Ratio io5 User manual

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io5Installation Guide

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Thank you for
choosing the io5
Ratio EV Charging
Unit 1 Target Park
Shawbank Road
Lakeside
Redditch
Worcestershire
United Kingdom
B98 8YN
[phone]
[e-mail]
[e-mail]
[e-mail]
ratioev.uk

Preface | 3
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About this document
Preface
This manual contains technical descriptions and instructions for the following product:
Category of product Charger for Electric Vehicles
Product name io5
Art. No. 388xx
Hardware version io5
Serial number:
Bluetooth Password:
Write down the serial number of your product in the table above for future reference.
This manual contains all instructions and safety information for installation, commissioning,
use and maintenance of the product.
This manual is intended for:
• the qualified electrician who installs the product;
• the end-user who uses the charger;
• the product owner who maintains the product.
Copyright
The content of this manual is protected by copyright and other intellectual property laws.
The content of this manual may only be copied, modified, reproduce or translated with
express written permission from the manufacturer. This manual may only be published,
transmitted, displayed or made available to a third party with express written permission from
the manufacturer.
Disclaimer of liability
Ratio EV Charging cannot be held responsible for personal injury, damage to the product
or property damage caused by incorrect use, foreseeable misuse or failure to follow the
instructions in this manual. This also applies to unauthorized modifications of the product and
the use of non-approved spare parts, tools or accessories.
Ratio EV Charging reserves the right to modify this manual without notification beforehand.
Category of product Charger for Electric VehiclesCategory of product Charger for Electric Vehicles

Table of contents | 4
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Table of contents
1. Safety 5
1.1. Symbols and labels 5
1.1.1. Safety warnings 5
1.1.2. Fuel Identifier 5
1.1.3. Notices 6
1.2. Intended use 6
1.3. Reasonably foreseeable misuse 6
1.4. Qualification of personnel 7
1.5. Personal Protective Equipment 7
1.6. Safety Precautions 7
2. Product description 9
2.1. Charger Components 10
2.2. Sensor Box components (Optional for Smart charger) 11
3. Technical data 12
3.1. Product Labelling/Marking 13
4. Transport and Storage 13
4.1. Transport 13
4.2. Storage 13
5. Installation 13
5.1. Preparation 13
5.1.1. Check the contents 14
5.1.2. Required tools 15
5.1.3. Required wiring and electrical protection 15
5.2. Install the power cable in the distribution board 16
5.3. Install the Sensor Box in the consumer unit 16
5.4. Charger Installation/Mounting 19
5.5. Connect the power cable to the charger 20
5.6. Ethernet cable installation 24
5.7. Data cable installation 25
5.8 Install a data cable between two chargers for Power Sharing 27
5.8.1. In the Main Controller 27
5.8.2. In the Sub charger 28
5.9. Final installation checks 30
5.10. Finish the installation 31
6. Commissioning 32
6.1. The unique password of the charger 32
6.2. Download the Ratio EV Charging App 32
6.3. Initial configuration of the charger 32
6.4. Overview of the Ratio EV Charging App 34
6.5. Connect the charger to the Ratio EV Charging App 34
6.6. Testing solar charging functionality 35
6.7. Updating the charger 35
7. Using the io5 36
7.1. Start charging 36
7.2. During charging 37
7.2.1. Charging paused 37
7.3. Stop charging 37
8. Settings 37
9. Maintenance 39
10. Troubleshooting 40
11. Service 42
12. Data protection 42
13. Warranty 42
14. Disposal 42
15. EC Declaration of Conformity 43
1.2. Intended use 61.2. Intended use 6
4. Transport and Storage 134. Transport and Storage 13
5.3. Install the Sensor Box in the consumer unit 165.3. Install the Sensor Box in the consumer unit 16
5.9. Final installation checks 305.9. Final installation checks 30
6.5. Connect the charger to the Ratio EV Charging App 346.5. Connect the charger to the Ratio EV Charging App 34
1.4. Qualification of personnel 71.4. Qualification of personnel 7
4.2. Storage 134.2. Storage 13
5.5. Connect the power cable to the charger 205.5. Connect the power cable to the charger 20
6.7. Updating the charger 356.7. Updating the charger 35
7.2.1. Charging paused 377.2.1. Charging paused 37
10. Troubleshooting 4010. Troubleshooting 40
14. Disposal 4214. Disposal 42
1.1.1. Safety warnings 51.1.1. Safety warnings 5
1.1.2. Fuel Identifier 51.1.2. Fuel Identifier 5
3. Technical data 123. Technical data 12
5.1.3. Required wiring and electrical protection 155.1.3. Required wiring and electrical protection 15
5.8.1. In the Main Controller 275.8.1. In the Main Controller 27
6.3. Initial configuration of the charger 326.3. Initial configuration of the charger 32
1.1.3. Notices 61.1.3. Notices 6
3.1. Product Labelling/Marking 133.1. Product Labelling/Marking 13
5.2. Install the power cable in the distribution board 165.2. Install the power cable in the distribution board 16
5.8.2. In the Sub charger 285.8.2. In the Sub charger 28
6.4. Overview of the Ratio EV Charging App 346.4. Overview of the Ratio EV Charging App 34
1.3. Reasonably foreseeable misuse 61.3. Reasonably foreseeable misuse 6
4.1. Transport 134.1. Transport 13
5.4. Charger Installation/Mounting 195.4. Charger Installation/Mounting 19
5.10. Finish the installation 315.10. Finish the installation 31
6.6. Testing solar charging functionality 356.6. Testing solar charging functionality 35
7.2. During charging 377.2. During charging 37
9. Maintenance 399. Maintenance 39
11. Service 4211. Service 42
1.5. Personal Protective Equipment 71.5. Personal Protective Equipment 7
5. Installation 135. Installation 13
5.6. Ethernet cable installation 245.6. Ethernet cable installation 24
7. Using the io5 367. Using the io5 36
7.3. Stop charging 377.3. Stop charging 37
12. Data protection 4212. Data protection 42
15. EC Declaration of Conformity 4315. EC Declaration of Conformity 43
13. Warranty 4213. Warranty 42
1.6. Safety Precautions 71.6. Safety Precautions 7
5.1. Preparation 135.1. Preparation 13
5.7. Data cable installation 255.7. Data cable installation 25
6. Commissioning 326. Commissioning 32
7.1. Start charging 367.1. Start charging 36
8. Settings 378. Settings 37
1. Safety 51. Safety 5
2. Product description 92. Product description 9
2.1. Charger Components 102.1. Charger Components 10
5.1.1. Check the contents 145.1.1. Check the contents 14
5.8 Install a data cable between two chargers for Power Sharing 275.8 Install a data cable between two chargers for Power Sharing 27
6.1. The unique password of the charger 326.1. The unique password of the charger 32
1.1. Symbols and labels 51.1. Symbols and labels 5
2.2. Sensor Box components (Optional for Smart charger) 112.2. Sensor Box components (Optional for Smart charger) 11
5.1.2. Required tools 155.1.2. Required tools 15
6.2. Download the Ratio EV Charging App 326.2. Download the Ratio EV Charging App 32

Safety | 5
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Please make sure the instructions have been fully read and understood before commencing
the installation or use of the product. Failure to follow the instructions from this manual can put
people, surroundings, the environment and product at risk. Store this manual securely for future
reference.
Always comply with the information, such as labels and the nameplate, attached directly to
the product and keep the information in a legible condition.
Always comply with any applicable laws and regulations that have not been accounted for in
this manual for example IET regulations.
1.1.1. Safety warnings
This manual contains safety warnings that may result in injury if ignored. Each safety
warning is indicated with a safety identifier. The identifier corresponds with the level of risk of
the described hazardous situation, see the table below.
Safety warnings at the start of a section apply to the entire section.
Safety warnings that refer to a particular sentence or procedure step are embedded in the
running text.
Medium Could result in death or serious injury
Low Could result in minor or moderate injury
1.1. Symbols and labels
Safety Risk of injury Result when instruction is ignored or not followed
Identifier correctly
1. Safety
1.1.2. Fuel Identifier
The Fuel Identifier is there to inform the user the fuel type used (electricity) by this charger and
to instruct which end of the cable is to be plugged into the socket or vehicle inlet.
For Socket versions of io5 - The Fuel Identifier symbol is located at the front of the charger
by the socket. The socket on the io5 receives the Plug end of charging cables which should be
indicated with a smaller similar graphical illustration. This will be either silver or white in colour.
For Tethered versions of io5 - The Fuel Identifier label on this version will be located on the
vehicle connector.

Safety | 6
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The Ratio io5 Charger is both a non-restricted and restricted charger intended to charge electric
vehicles using power from solar panels and household power grid. The product can
be operated indoors and outdoors.
The product must only be operated within its performance limits and under the permitted
ambient conditions, as stated in the technical specifications in chapter 3.
The product can be mounted flush to a wall or to a separately available pole.
Safe use of the product is only guaranteed if it is used as intended.
The following is considered foreseeable misuse:
• Use in an environment that varies from or exceeds the given environmental conditions.
• Use that varies from or exceeds the given operating conditions.
• Failure to comply with the instructions in this manual.
• Failure to eliminate faults, malfunctions or defects of the product that impose safety risks.
1.2. Intended use
1.3. Reasonably foreseeable misuse
1.1.3. Notices
Messages that are not hazard-related are indicated with the safety identifier NOTICE. These
messages do not have a safety alert symbol.
Could result in damage to the product when instruction is ignored or not
followed correctly.
Note Additional information or emphasis on an instruction.
Signal word Meaning
Charging cable - Charging cables will have a small white/silver Fuel Identifier on the plug side to
indicate this is compatible with the socket, and a black Fuel Identifier on the vehicle connector
to specify this end is to be plugged into the vehicle inlet.
or
Untethered Tethered Charging Cable
or
or
Plug
(for Socket)
Vehicle
Connector
C
C
(for Socket)

Safety | 7
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Wear the appropriate Personal Protective Equipment (PPE) according to the
manual of any tools used during installation of the charger.
Wear insulating gloves when installing wires and touching electrical components to avoid
damaging the product by static discharge.
Only authorised electricians are allowed to perform installation and maintenance of the
product. They must meet the below stated criteria:
• are of legal age.
• are familiar and abide by the safety instructions and sections of this manual related to
installation and maintenance of the product.
• are familiar with and abide by the applicable local, national and international laws and
regulations.
• are able to recognise the possible dangers of the product and take the necessary
measures to protect persons and property.
• have received adequate training in the safe installation and maintenance of this product.
• hold the relevant qualifications.
• Failure to carry out the inspections and maintenance operations as described in this
manual.
• Unauthorised removal or modification of parts or safety devices of the product.
• Use of spare parts or accessories that have not been approved by the manufacturer.
• Operation in a flammable and/or explosive environment.
• Operation in closed-off or poorly ventilated rooms.
Despite the safe design and construction of the product and the prescribed protective
measures, the product possesses residual risks. This manual provides safety messages to
indicate these risks. The formatting and appearance of safety messages that are dedicated to
a particular section or sentence is explained in chapter 1.1.
Read all the safety warnings and instructions before using the product. Failure to follow the
warnings and the instructions may result in electric shock, fire and/or serious injury.
1.5. Personal Protective Equipment
1.6. Safety precautions
1.4. Qualification of personnel
Wear the appropriate Personal Protective Equipment (PPE) according to the
• Do not put fingers into the electric vehicle connector.
• Do not use this product if the flexible power cord or EV cable are frayed, have broken
insulation, or show any other signs of damage.

Safety | 8
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• Ensure the supply cable of the product is positioned so it will not be stepped on,
tripped over, or otherwise subjected to damage or stress.
• There are no user serviceable parts inside. Refer to the Customer Support section in this
manual for service information. Do not attempt to repair or service the product yourself.
• Do not operate this product if it or the supply cable or housing is visibly damaged. Isolate the
supply in the electrical cabinet and contact your Service Representative for service
immediately. Refer to the Customer Support section in the manual for information on the
Service Representative in your area.
• Only use this product to charge electric vehicles equipped with a conductive charge
port. See the vehicle owner’s handbook to determine the vehicle is equipped with a
conductive charge port.
• Use of any adaptors is not allowed with this product.
• Only use certified Type 2 charging cables with this product.
• Cord extension sets are not allowed to be used.
• Do not drop the product and avoid impacts.
• Do not store the product in an environment that exceeds the ambient conditions stated
in this manual.
• Do not expose the internal components of the product to moisture.
• Do not immerse the product in water or any other liquid.
• Do not use the product if the enclosure or EV connector are broken, cracked, open, or
show any other indication of damage.
• The electrical installation must be isolated during the entire installation period.
• Improper connection of equipment-grounding conductor can result in a risk of electric
shock. Check with a qualified electrician or serviceman if you doubt whether the product
is properly grounded.
• Do not use this product if it not functioning according to the instructions in this manual.
Seek advice from Ratio, your vendor, or a qualified electrician or service agent.
• Do not attempt to remove the charging plug while a charging session is active.
• Children should not be allowed to use this product. Do not allow children to play near the
product. Children should be supervised when using this device around them.
• The installation must be conducted by a qualified electrician in line with local and national
legislation and IET regulation.
• Open PEN fault protection is incorporated into single phase io5 charger variants.
• For three-phase io5 charger variants open PEN fault protection is not integral to the charger. A
third party open PEN device or an earth electrode should be installed as per IET regulations.

Product description | 9
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2. Product description
The io5 is a Mode 3 charger for charging electric vehicles (EVs) which complies with the
IEC61851 series of standards.
The io5 is equipped with several features to optimise power consumption and charging
performance.
Dynamic Load balancing
The product uses a Sensor Box with Current Transformer(s) (CT) to measure the live power
consumption of the power grid per phase and uses that information to manage the power
output to the EV. When more electrical appliances are used, the power output to the EV is
reduced to avoid overloading the local power grid.
Power Sharing
If more than one charger has been purchased, they can be interconnected with a data
cable and use the integrated Power Sharing feature to equally distribute the available power
across the charge points using the data from the Sensor Box.
The Sensor Box uses up to three CT clamps, one for each phase of the main grid, to measure
the current flow of the main grid. The Sensor Box is also compatible with solar panel
installations and can measure the direction of the current.
One charger is connected to the Sensor Box with a data cable. This charger acts as the Main
Controller (MAIN), and manages the power for up to three Sub Chargers (SUB1, SUB2 and
SUB3).
It is also possible to use Power Sharing without the Sensor Box. The charger will function
without Dynamic Load Balancing, but the chargers must still be connected to each other with a
data cable and set in Basic mode.
Note: Pure Solar mode is not compatible with Power Sharing.
Over the air (OTA) updates
The io5 charger is equipped with the technology to receive over the air updates, enabling your
charger to receive the available updates over the internet.
Ratio EV Charging App
The charger can be controlled with the Ratio EV Charging App.
The App is available in the Google Play store and Apple store.
Multiple users and multiple cars
Different users and multiple cars can be added to view the charging sessions of each
individual online. A maximum of five users or cars can be created.

Product description | 10
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Charge modes
The charger has four available charge modes:
Basic The charger charges the EV using a set maximum current in Amps
(Maximum charging current). - no Load Balancing
Smart The charger only charges the EV when the available current is above
the minimum set current in Amps (Minimum charging current) and
below the maximum current that is still available on the main grid. *
SmartSolar The charger only charges the EV when the available current is above
the minimum set current in Amps (SmartSolar minimal charging current)
and below the maximum current that is still available on the main grid.
If the charger is charging the EV and there is still net current
generation, the charger uses this surplus of energy to charge the car in
addition to the minimum set current. *
PureSolar The charger only charges the EV when there is a net current generation
(e.g. from solar panels), that is above the minimum set current in Amps
(PureSolar minimal charging current). *
* Charging at a maximum current while protecting the building from over current loading
with Dynamic Load Balancing. While charging at home or commercial facility, the charging
current adapts to the maximum allowed consumption in the building.
Note: PureSolar mode is not compatible with Power Sharing. If you set the charge mode
to PureSolar, Power Sharing will be disabled.
Power LED
4 Fault LED
5Charge LED
1 Front cover bezel
2 Charge socket (not on
tethered versions)
2.1. Charger Components
10 Ratio io5 Charger Manual
Charge modes
The charger has four available charge modes:
Basic The charger charges the EV using a set maximum power in Amps
(Maximum charging current). - no Load Balancing
Smart The charger only charges the EV when the available power is above
the minimum set power in Amps (Minimum charging current) and
below the maximum power that is still available on the main grid. *
SmartSolar The charger only charges the EV when the available power is above
the minimum set power in Amps (SmartSolar minimal charging
current) and below the maximum power that is still available on the
main grid. If the charger is charging the EV and there is still net
power generation, the charger uses this surplus of energy to charge
the car in addition to the minimum set power. *
PureSolar The charger only charges the EV when there is a net power
generation (e.g. from solar panels), that is above the minimum set
power in Amps (PureSolar minimal charging current). *
* Charging at a maximum current while protecting the building from overcurrent loading
with Dynamic Load Balancing. While charging at home or an office building the charging
current adapts to the maximum allowed consumption in the building.
Note: PureSolar mode is not compatible with Power Sharing . If you set the charge mode to
PureSolar, Power Sharing will be disabled.
2 . 1 . Charger components
Power
Fault
Charge
1
2
3
4
5
1 Front cover ring
2 Charge socket
3 P o w e r L E D
4 Fault LED
5 Charge LED

Product description | 11
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2.2. Sensor Box components (Optional for Smart charger)
Note: The io5 does not include the CT clamps and Sensor Box needed for
Dynamic Load Balancing and PV charging. To upgrade your io5 to support
Dynamic Load Balancing, a Sensor Box kit will need to be purchased. This package
contains a Sensor Box, CT clamps, Mains input cable and an adhesive strip for mounting.
Follow the instructions in chapter 5.3. of this manual to install a Sensor Box in your io5.
1Phase 1 (L1) CT clamp input
2Phase 2 (L2) CT clamp input
3Phase 3 (L3) CT clamp input
4Mains input *
5P1 meter input (inactive)
6Status LED
7 Input/Output **
8Data cable connector
9CT clamp (3 x for 3-phase installation, 1 x for 1-phase installation)
10 Plug
* The mains input does not supply power to the Sensor Box. It is used to determine the direction
of the measured current. The provided mains input cable must be installed on
phase 1 (L1) of the main power grid and is orientation sensitive.
** Not for Ethernet connection.
11www.ratio-electric.com
2 . 2 . Sensorbox components (Optional for Smart charger)
Note: The Ratio Smart charger does not include the CT clamps and Sensorbox needed for
Dynamic Load Balancing and PV charging. To upgrade your Ratio Smart charger to support
Dynamic Load Balancing, purchase Ratio Sense. This package contains a Ratio Sensorbox
and CT clamps. Follow the instructions in chapter 5 . 3 . of this manual to install Ratio Sense in
your Ratio Smart charger.
9
3 4 65 7 81 2
1 Phase 1 (L1) CT clamp input
2 Phase 2 (L2) CT clamp input
3 Phase 3 (L3) CT clamp input
4 Mains input*
5 P1 meter input (inactive)
6 Status LED
7 Input/Output **
8 Data cable connector
9 CT clamp (3× for 3-phase installation)
* The mains input does not supply power to the Sensorbox. It is used to determine the
direction of the measured current. The provided mains input cable must be installed on phase
1 (L1) of the main power grid and is orientation sensitive.
** Not for Ethernet connection.
11www.ratio-electric.com
2 . 2 . Sensorbox components (Optional for Smart charger)
Note: The Ratio Smart charger does not include the CT clamps and Sensorbox needed for
Dynamic Load Balancing and PV charging. To upgrade your Ratio Smart charger to support
Dynamic Load Balancing, purchase Ratio Sense. This package contains a Ratio Sensorbox
and CT clamps. Follow the instructions in chapter 5 . 3 . of this manual to install Ratio Sense in
your Ratio Smart charger.
9
3 4 65 7 81 2
1 Phase 1 (L1) CT clamp input
2 Phase 2 (L2) CT clamp input
3 Phase 3 (L3) CT clamp input
4 Mains input*
5 P1 meter input (inactive)
6 Status LED
7 Input/Output **
8 Data cable connector
9 CT clamp (3× for 3-phase installation)
* The mains input does not supply power to the Sensorbox. It is used to determine the
direction of the measured current. The provided mains input cable must be installed on phase
1 (L1) of the main power grid and is orientation sensitive.
** Not for Ethernet connection.
Note: It is advised to check the voltage of the Sensor Box via the Ratio app. This should
supply a positive figure in the U1 box within the “Measured Values” in the Ratio app.
10

Technical data | 12
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Product name io5
Art. no. 388xx
Charging System IEC61851, Mode 3
Cable version car connector IEC 62196, Type 2
Outlet version IEC 62196, Type 2 Outlet
Power input Single-phase or three-phase, 230V-400V AC, 16A-32A
Max Power output output 7,4 kW / 230V AC, 22 kW / 400V AC
Frequency 50 Hz
Protection against electric shock Class I
Residual current detection DC 6mA
Dimensions 400mm × 250mm × 105mm
Housing PC/ABS-V0
Weight 4kg (incl. cable)
IP Protection rating IP54
Ambient temperature -25°C to +40°C
Markings CE & UKCA
Ventilation Not supported
Required protection device type Type A
Supported connectivity protocols Bluetooth® wireless technology
Wi-Fi
Ethernet
3. Technical data

Transport and storage | 13
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3.1. Product Labelling/Marking
4. Transport and Storage
The product is marked in accordance with the applicable legislative requirements. The
product labelling/marking is located on the bottom of the housing, above the cable inlets.
1Manufacturer
2Contact details
3Product number
4IP rating
5Ambient temperature range
6Product name
7Production date
8Rated input power & frequency
9Barcode serial number
10 Product serial number
11 Connectivity serial number
(visible in App)
4.1. Transport
Transport the product in the original packaging, or suitable replacement packaging that
provides adequate protection from vibrations, impacts, moisture, dust, and debris.
Ensure to not drop the product and prevent it from impacts.
Excessive vibrations could loosen connections and cause product malfunction.
4.2. Storage
Store the product in the original packaging or a suitable replacement packaging to protect
the product from moisture, dust, and debris.
Do not store anything on top of the product.
1
2
36
9
4710
5811
Prod- SNr : XXXXXXX
Conn-SNr : XXXXXXXXXXXXXX
Ratio EV Charging
Target Park, Shawbank Road
Redditch, B98 8YN, UK
PNr: io5xxx 2 x 22kW
IP54 -25ºC + 40ºC 09/2023
230/3x230/400VAC 32A 50Hz
Ratio EV Charging
Target Park, Shawbank Road
Redditch, B98 8YN, UK
PNr: io7xxx 2 x 22kW
IP54 -25ºC + 40ºC 09/2023
230/3x230/400VAC 32A 50Hz
5. Installation
5.1. Preparation
• The installation must be done by a qualified electrician in accordance with local and national
legislation and IET regulations.
• The electrical installation must be isolated during the entire installation period.
• Since this charging unit uses circuits that reference to ground, no insulation resistance testing
should be conducted on the unit after connecting to the supply network.

Technical data | 14
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1. Open the box and remove the contents.
2. Place all parts on an empty surface to avoid losing any parts.
3. Check if all parts are present and undamaged using the overview below. In case of any
parts missing or damaged, please contact your local dealer or Ratio EV Charging.
5.1.1. Check the contents
1 Charger
2Frame
3Sensor Box with connector*
4 Locknut for cable gland
5M25 cable gland (x2)
6a Single hole insert
for data cables
6b Double hole insert
for data cable
7 Drilling template
8Current transformers*
(x3 for three-phase installation)
9 Mains input cable for Sensor Box*
10 Rubber grommet for data cable
11 Screw caps (x4)
12 RJ10 connector (x4)
13 Adhesive strip*
14 Fuel Identifier Label
* These parts are not included with the io5 charger.
*
* * * *
14 Ratio io5 Charger Manual
5 . Installation
5 . 1 . P r e p a r a t i o n
6WARNING
• The installation must be done by a qualified and licensed electrician according the local
legislation.
• The electrical installation must be free of power during the entire installation period.
• Since this charger uses circuits that reference to ground, no megging must be done after
connecting to power.
5 . 1 . 1 . C h e c k t h e c o n t e n t s
1 . Open the box and remove the contents.
2 . Place all parts on an empty surface to avoid losing any parts.
3 . Check if all parts are present and undamaged using the overview below. In case of any
parts missing or damaged, please contact your local dealer or Ratio Electric B.V.
Ø25 mm
Level
321 4 5
wq8 9
76
re
1 C h a r g e r
2 Front cover ring
3 Sensorbox with connector
4 Locknut for cabale gland
5 M25 cable gland (2×)
6 Foam insert for data cables
7 Drilling template
8 Current transformers
(3× for 3-phase installation)
9 Mains input cable for Sensorbox
q Rubber grommet for data cable
w Screw caps (4×)
e RJ10 connector (4×)
r Adhesive strip
Note: The Ratio Smart charger does not include the CT clamps and Sensorbox needed for
Dynamic Load Balancing and PV charging. To upgrade your Ratio Smart charger to support
Dynamic Load Balancing, purchase Ratio Sense. This package contains a Ratio Sensorbox
and CT clamps. Follow the instructions in chapter 5 . 3 . of this manual to install Ratio Sense in
your Ratio Smart charger.
14 Ratio io5 Charger Manual
5 . Installation
5 . 1 . P r e p a r a t i o n
6 WARNING
• The installation must be done by a qualified and licensed electrician according the local
legislation.
• The electrical installation must be free of power during the entire installation period.
• Since this charger uses circuits that reference to ground, no megging must be done after
connecting to power.
5 . 1 . 1 . C h e c k t h e c o n t e n t s
1 . Open the box and remove the contents.
2 . Place all parts on an empty surface to avoid losing any parts.
3 . Check if all parts are present and undamaged using the overview below. In case of any
parts missing or damaged, please contact your local dealer or Ratio Electric B.V.
Ø25 mm
Level
321 4 5
wq8 9
76
re
1 C h a r g e r
2 Front cover ring
3 Sensorbox with connector
4 Locknut for cabale gland
5 M25 cable gland (2×)
6 Foam insert for data cables
7 Drilling template
8 Current transformers
(3× for 3-phase installation)
9 Mains input cable for Sensorbox
q Rubber grommet for data cable
w Screw caps (4×)
e RJ10 connector (4×)
r Adhesive strip
Note: The Ratio Smart charger does not include the CT clamps and Sensorbox needed for
Dynamic Load Balancing and PV charging. To upgrade your Ratio Smart charger to support
Dynamic Load Balancing, purchase Ratio Sense. This package contains a Ratio Sensorbox
and CT clamps. Follow the instructions in chapter 5 . 3 . of this manual to install Ratio Sense in
your Ratio Smart charger.
14

Transport and storage | 15
[phone] / [e-mail] / www.ratioev.uk
5.1.2. Required tools
Size 3 flat-head
Screwdriver
T15 Torx
Spirit level
4 x 35 mm
Screws
4 x Rawl plugs
(if applicable)
RJ10 Crimping
tool
5.1.3. Required wiring and electrical protection
Data cable Shielded UTP cable or 4 x 0.25 mm2 cable
15www.ratio-electric.com
5 . 1 . 2 . R e q u i r e d t o o l s
Spirit level Size 3 flathead TX10 Torx Voltage tester
T10
Hammer RJ10 Crimping tool Screws 5×35 mm
(4×)
Appropriate wall
plugs (4×) (if
applicable)
5 . 1 . 3 . Required wiring and electrical protection
16 A 32 A
Wiring cross section 1-phase* 3 × 2,50 mm
2 , solid wire* 3 × 6,00 mm 2 , solid wire*
Wiring cross section 3-phase* 5 × 2,50 mm
2 , solid wire* 5 × 6,00 mm 2 , solid wire*
Mains Circuit Breaker (MCB) 20 A, B/C-characteristic 40 A, B/C-characteristic
Residual Current Device (RCD) 30 mA, Type A
Data cable Shielded UTP cable or 4×0,25 mm
2 cable
* max 25 m cable length
15www.ratio-electric.com
5 . 1 . 2 . R e q u i r e d t o o l s
Spirit level Size 3 flathead TX10 Torx Voltage tester
T10
Hammer RJ10 Crimping tool Screws 5×35 mm
(4×)
Appropriate wall
plugs (4×) (if
applicable)
5 . 1 . 3 . Required wiring and electrical protection
16 A 32 A
Wiring cross section 1-phase* 3 × 2,50 mm
2 , solid wire* 3 × 6,00 mm 2 , solid wire*
Wiring cross section 3-phase* 5 × 2,50 mm
2 , solid wire* 5 × 6,00 mm 2 , solid wire*
Mains Circuit Breaker (MCB) 20 A, B/C-characteristic 40 A, B/C-characteristic
Residual Current Device (RCD) 30 mA, Type A
Data cable Shielded UTP cable or 4×0,25 mm
2 cable
* max 25 m cable length
15www.ratio-electric.com
5 . 1 . 2 . R e q u i r e d t o o l s
Spirit level Size 3 flathead TX10 Torx Voltage tester
T10
Hammer RJ10 Crimping tool Screws 5×35 mm
(4×)
Appropriate wall
plugs (4×) (if
applicable)
5 . 1 . 3 . Required wiring and electrical protection
16 A 32 A
Wiring cross section 1-phase* 3 × 2,50 mm
2 , solid wire* 3 × 6,00 mm 2 , solid wire*
Wiring cross section 3-phase* 5 × 2,50 mm
2 , solid wire* 5 × 6,00 mm 2 , solid wire*
Mains Circuit Breaker (MCB) 20 A, B/C-characteristic 40 A, B/C-characteristic
Residual Current Device (RCD) 30 mA, Type A
Data cable Shielded UTP cable or 4×0,25 mm
2 cable
* max 25 m cable length
15www.ratio-electric.com
5 . 1 . 2 . R e q u i r e d t o o l s
Spirit level Size 3 flathead TX10 Torx Voltage tester
T10
Hammer RJ10 Crimping tool Screws 5×35 mm
(4×)
Appropriate wall
plugs (4×) (if
applicable)
5 . 1 . 3 . Required wiring and electrical protection
16 A 32 A
Wiring cross section 1-phase* 3 × 2,50 mm
2 , solid wire* 3 × 6,00 mm 2 , solid wire*
Wiring cross section 3-phase* 5 × 2,50 mm
2 , solid wire* 5 × 6,00 mm 2 , solid wire*
Mains Circuit Breaker (MCB) 20 A, B/C-characteristic 40 A, B/C-characteristic
Residual Current Device (RCD) 30 mA, Type A
Data cable Shielded UTP cable or 4×0,25 mm
2 cable
* max 25 m cable length
15www.ratio-electric.com
5 . 1 . 2 . R e q u i r e d t o o l s
Spirit level Size 3 flathead TX10 Torx Voltage tester
T10
Hammer RJ10 Crimping tool Screws 5×35 mm
(4×)
Appropriate wall
plugs (4×) (if
applicable)
5 . 1 . 3 . Required wiring and electrical protection
16 A 32 A
Wiring cross section 1-phase* 3 × 2,50 mm
2 , solid wire* 3 × 6,00 mm 2 , solid wire*
Wiring cross section 3-phase* 5 × 2,50 mm
2 , solid wire* 5 × 6,00 mm 2 , solid wire*
Mains Circuit Breaker (MCB) 20 A, B/C-characteristic 40 A, B/C-characteristic
Residual Current Device (RCD) 30 mA, Type A
Data cable Shielded UTP cable or 4×0,25 mm
2 cable
* max 25 m cable length
1 - For cable lengths up to 25m. For longer cable lengths refer to IET regulations.
2- Ensure RCD is compliant with BS EN 61008-1 and switches all poles (including neutral).
3- Ensure RCBO is compliant with BS EN 61009-1 and switches all poles (including neutral).
Select Protection Option 1 or 2 from the above table.
Protection Option 1
Miniature Circuit
Breaker (MCB)
20A B/C-Curve
20A B/C-Curve
40A B/C-Curve
40A B/C-Curve
Residual Current
Device (RCD) 2
Type A, DP
Type A, 3P+N
Type A, DP
Type A, 3P+N
Version
16A / 1 Phase
16A / 3 Phase
32A / 1 Phase
32A / 3 Phase
Wiring 1
3 G 2.50mm2
5 G 2.50mm2
3 G 6.00mm2
5 G 6.00mm2
Protection Option 2
RCBO 3 - Residual current
Breaker with Over-current
20A B/C Curve,
Type A, DP
20A B/C Curve,
Type A, 3P+N
40A B/C Curve,
Type A, DP
40A B/C Curve,
Type A, 3P+N
* The above tools are not included with the charger.
15www.ratio-electric.com
5 . 1 . 2 . R e q u i r e d t o o l s
Spirit level Size 3 flathead TX10 Torx Voltage tester
T10
Hammer RJ10 Crimping tool Screws 5×35 mm
(4×)
Appropriate wall
plugs (4×) (if
applicable)
5 . 1 . 3 . Required wiring and electrical protection
16 A 32 A
Wiring cross section 1-phase* 3 × 2,50 mm
2 , solid wire* 3 × 6,00 mm 2 , solid wire*
Wiring cross section 3-phase* 5 × 2,50 mm
2 , solid wire* 5 × 6,00 mm 2 , solid wire*
Mains Circuit Breaker (MCB) 20 A, B/C-characteristic 40 A, B/C-characteristic
Residual Current Device (RCD) 30 mA, Type A
Data cable Shielded UTP cable or 4×0,25 mm
2 cable
* max 25 m cable length

Installation | 16
[phone] / [e-mail] / www.ratioev.uk
1. The electrical installation must be isolated during the entire installation period. Do not use
the io5 until the installation has been completed.
2. Lay down a power cable and data cable between the distribution board and the installation
location of the charger.
3. It is advised to connect the charger to your internet network with an Ethernet cable
instead of using Wi-Fi. Therefore, install an Ethernet cable between your internet
modem and the charger.
4. For circuit protection devices please refer to section 5.1.3.
5. Connect the power cable wires to the dedicated protection devices in the distribution board.
1. Mount the Sensor Box to a free location in the meter cupboard.
2. Plug the mains input cable into the Sensor Box.
3. Plug the other end of the mains input cable into a power outlet connected to the same
phase as L1 of the charger.
If not applicable, please refer to section 5.4.
For polarity information, please refer to section 2.2.
5.2. Install the power cable in the distribution board
5.3. Install the Sensor Box in the consumer unit
16 Ratio io5 Charger Manual
5 . 2 . Install the power cable in the consumer unit
1 . Switch off the Main Circuit Breaker (MCB) in the consumer unit to cut power to the main
grid.
2 . Lay down a power cable and data cable between the consumer unit and the installation
location of the charger.
3 . It is advised to connect the charger to your internet network with an Ethernet cable
instead of using Wi-Fi. Therefor, lay down an Ethernet cable between your internet
modem and the charger.
4 . Install a dedicated 30 mA, Type A Residual Current Device (RCD), or use an available 30
mA, Type RCD.
5 . Strip the wires of the power cable.
6 . Connect the power cable wires to the dedicated RCD in the consumer unit.
5 . 3 . Install the Sensorbox in the consumer unit
1 . Mount the Sensorbox to a free location in the consumer unit.
1
(L)
(N)
MAINS
2
3
2 . Plug the mains input cable into the Sensorbox.
3 . Plug the other end of the mains input cable into a power outlet connected to the same
phase as L1 of the charger.
Note: The mains input is orientation sensitive. If the mains plug is inserted upside down, the
measurements of the Sensorbox will be inaccurate. Check the markings on the Sensorbox
for the correct orientation, check the correct position of L and N.
Note: The mains input is polarity sensitive. If the mains plug is inserted upside down, the
measurements of the Sensor Box will be inaccurate. Check the markings on the Sensor Box
for the correct polarity, check the correct position of L and N.

Installation | 17
[phone] / [e-mail] / www.ratioev.uk
4. Check on which phase of the main power grid the power outlet is connected.
5. Place a current transformer around the same phase wire of the main power grid, between
the main fuse and the consumer unit.
6. Insert the 3.5mm jack of the current transformer to the L1 input on the Sensor Box.
17www.ratio-electric.com
1
(L)
(N)
MAINS
2
3
1
(L)
(N)
MAINS
2
3
(N)
1
(L)
(N)
MAINS
2
3
(N)
4 . Check on which phase of the main power grid the power outlet is connected.
5 . Place a current transformer around the same phase wire of the main power grid, between
the main fuse and the consumer unit.
6 . Insert the 3,5 mm jack of the current transformer to the L1 input on the Sensorbox.
Note : For correct functioning of the Sensorbox, you must install this current transformer
around the same phase as the power supply (L).
Note: Make sure the arrow on the current transformer points towards the entry point of
the main power grid. See the image below for more information on the correct mounting
location of the CT clamps.
CT
Clamp
Sensor
Box
Solar
Panels
1
2
3
Data to
Charging Station
Distribution
box
Main
Fuse
Net L1
L2
L3
N
L1 L2 L3
TVS
KK
L
L
KL
N
User
User
User
User
Note: For correct functioning of the Sensor Box, you must install this current transformer
around the same phase as the power supply (L).
Note: Make sure the arrow on the current transformer points towards the entry point of
the main power grid. See the image below for more information on the correct mounting
location of the CT clamps.
Note: For single-phase installations only install CT clamp 1 and connect to L1 position on
Sensor Box.
17www.ratio-electric.com
1
(L)
(N)
MAINS
2
3
1
(L)
(N)
MAINS
2
3
(N)
1
(L)
(N)
MAINS
2
3
(N)
4 . Check on which phase of the main power grid the power outlet is connected.
5 . Place a current transformer around the same phase wire of the main power grid, between
the main fuse and the consumer unit.
6 . Insert the 3,5 mm jack of the current transformer to the L1 input on the Sensorbox.
Note : For correct functioning of the Sensorbox, you must install this current transformer
around the same phase as the power supply (L).
Note: Make sure the arrow on the current transformer points towards the entry point of
the main power grid. See the image below for more information on the correct mounting
location of the CT clamps.
CT
Clamp
Sensor
Box
Solar
Panels
1
2
3
Data to
Charging Station
Distribution
box
Main
Fuse
Net L1
L2
L3
N
L1 L2 L3
TVS
KK
L
L
KL
N
User
User
User
User

Installation | 18
[phone] / [e-mail] / www.ratioev.uk
18 Ratio io5 Charger Manual
1
(L)
(N)
MAINS
2
3
7 . Place the remaining current transformers around the other phase wires of the main power
grid, also between the main fuse and the consumer unit/solar panel connections.
8 . Insert the 3,5 mm jacks of the current transformers to the L2 and L3 input on the
Sensorbox.
1
(L)
(N)
MAINS
2
3
40 mm
9 . Strip the wires of the data cable (not included).
10 . Insert four wires of the data cable into the RJ10 connector.
11 . Secure the wires to the RJ10 connector. Use a RJ10 crimping tool.
12 . Write down the colours and order of the inserted wires of the data cable.
8. Insert the 3.5mm jacks of the current transformers to the L2 and L3 input on the
Sensor Box.
9. Strip the wires of the data cable (not included).
10. Insert four wires of the data cable into the RJ10 connector.
7. Place the remaining current transformers around the other phase wires of the main
power grid, and also between the main fuse and the consumer unit/solar panel
connections. Ensure the arrow within the CT clamp is pointing towards the main fuse.
11. Secure the wires to the RJ10 connector. Use a RJ10 crimping tool.
12. Write down the colours and order of the inserted wires of the data cable.
18 Ratio io5 Charger Manual
1
(L)
(N)
MAINS
2
3
7 . Place the remaining current transformers around the other phase wires of the main power
grid, also between the main fuse and the consumer unit/solar panel connections.
8 . Insert the 3,5 mm jacks of the current transformers to the L2 and L3 input on the
Sensorbox.
1
(L)
(N)
MAINS
2
3
40 mm
9 . Strip the wires of the data cable (not included).
10 . Insert four wires of the data cable into the RJ10 connector.
11 . Secure the wires to the RJ10 connector. Use a RJ10 crimping tool.
12 . Write down the colours and order of the inserted wires of the data cable.
40mm

Installation | 19
[phone] / [e-mail] / www.ratioev.uk
13. Insert the RJ10 connector into the Sensor Box.
1. Tape the provided drilling template to the wall at the installation location, with the
bottom of the template about 80-100cm above the ground.
2. Ensure the template is level. Use a spirit level.
Alternatively
1. Hold the charger against the wall at the installation location, with the bottom of the
charger about 80-100cm above the ground.
2. Ensure the charger is level. Use a spirit level.
19www.ratio-electric.com
1
(L)
(N)
MAINS
2
3
13 . Insert the RJ10 connector into the Sensorbox.
150 mm
225 mm
80-100 cm
1 . Tape the provided drilling template to the wall at the installation location, with the
bottom of the template about 80-100 cm above the ground.
2 . Ensure the template is level. Use a spirit level.
Alternatively
1 . Hold the charger against the wall at the installation location, with the bottom of the
charger about 80-100 cm above the ground.
2 . Ensure the charger is level. Use a spirit level.
19www.ratio-electric.com
1
(L)
(N)
MAINS
2
3
13 . Insert the RJ10 connector into the Sensorbox.
150 mm
225 mm
80-100 cm
1 . Tape the provided drilling template to the wall at the installation location, with the
bottom of the template about 80-100 cm above the ground.
2 . Ensure the template is level. Use a spirit level.
Alternatively
1 . Hold the charger against the wall at the installation location, with the bottom of the
charger about 80-100 cm above the ground.
2 . Ensure the charger is level. Use a spirit level.
225mm
150mm
80-100cm
5.4. Charger Installation/Mounting

Installation | 20
[phone] / [e-mail] / www.ratioev.uk
3. Mark the locations of the holes in the charger housing on the wall.
4. Carefully remove the charger and lay it on a flat, stable and dry surface.
5. Drill the holes in the wall. Use an appropriate drill and drill bit.
6. Insert rawl plugs (not included) if applicable.
7. Align the charger with the holes in the wall and secure it with four 5 x 35mm screws (not
included).
1. Remove the five Torx screws from the housing lid. Use a size T15 screwdriver.
2. Move the housing lid to the side to access the inner circuitry of the product.
5.5. Connect the power cable to the charger
20 Ratio io5 Charger Manual
3 . Mark the locations of the holes in the charger housing on the wall.
4 . Carefully remove the charger and lay it on a flat, stable and dry surface.
5 . Drill the holes in the wall. Use an appropriate drill and drill bit.
6 . Insert wall plugs, if applicable.
7 . Align the charger with the holes in the wall and secure it with four 5×35 mm screws (not
included).
5 . 4 . Connect the power cable to the charger
TX10
1 . Remove the five Torx screws from the housing lid. Use a size TX10 screwdriver.
2 . Move the housing lid to the side to access the inner circuitry of the product.
20 Ratio io5 Charger Manual
3 . Mark the locations of the holes in the charger housing on the wall.
4 . Carefully remove the charger and lay it on a flat, stable and dry surface.
5 . Drill the holes in the wall. Use an appropriate drill and drill bit.
6 . Insert wall plugs, if applicable.
7 . Align the charger with the holes in the wall and secure it with four 5×35 mm screws (not
included).
5 . 4 . Connect the power cable to the charger
TX10
1 . Remove the five Torx screws from the housing lid. Use a size TX10 screwdriver.
2 . Move the housing lid to the side to access the inner circuitry of the product.
T15