Sterling Power HARDY H3500 User manual

Sterling Power Products
Portable Power Pack
Handbook
Part No:
H3500
H3500PLUS
www.sterling-power.com
www.sterling-power-usa.com
Warranty (2 years return to factory)
Copyright © 2024
Sterling Power
All Rights Reserved
RoHS
compliant
HARDY | 3500
HARDY | 3500Plus

Table of Contents | Dimension Drawing
Welcome
Legal Guidelines / Warranty Statement
Safety Guidelines
Annotation of what’s what.
More of what’s what and what’s included in the Hardy Kit
How to charge Hardy
How to use Hardy power
The screen and settings
The APP
Introduction
02
03
Safety and Legal
04
05
Product Information
06
07
08
09
10
11
Dimensions drawing
(not to scale)
INTRODUCTION TABLE OF CONTENTS
CONTENTS PAGE 02
STERLING
POWER
Dimensions 420mm x 265mm x 395mm
Weight 31kg | 40kg

INTRODUCTION WELCOME
STERLING
POWER
Welcome to the Sterling Power Products Owners Handbook for the HARDY. The portable power supply.
Please take your time to read and fully understand the contents of this Handbook. These guidelines are
developed with your safety and the products performance in mind and failure to follow or understand these
guidelines may lead to voiding the product warranty or even leading to damage or injury for you or your setup.
If you are unsure of any step or guideline then please consider reaching out to Sterling via our web contact form
or our phone service and we shall offer our support.
Thank you for joining the Sterling family and we hope to serve your travels well.
The Hardy is a portable power supply designed to store energy for use in both commercial and recreational
environments. The Hardy is equipped with a large lithium battery, a large inverter and several means of charging
the battery up. There are 2 models. The Hardy and the Hardy+. There specifications are identical, other than the
size of the battery.
This manual must be read throughout before installing this electronic device. Do not lose these instructions -
keep them safe. The most up to date instructions can be found on sterling-power.com. Please refer to the latest
instruction manual before contacting Sterling. At Sterling, we endeavour to include all of the product information
that we can think of into the manual.
Installation of the electronic device must be carried out by qualified and trained personnel only. The personnel
must be familiar with the locally accepted guidelines and safety measures.
Your safety is Sterling’s top priority. Please follow all precautions to keep yourself safe. If you believe your unit
requires repair then please contact Sterling or your distributor. Do not attempt to service the unit yourself.
Welcome
HARDY
Product Code Understanding
Using this Handbook
Safety
Specifications
INTRODUCTION 03
H3500
Battery capacity 12.8V | 150Ah | 1920Wh
Battery chemistry LiFePO4
BMS current rating 300A
AC inverter power 3500W | 230VAC 50hz
Quiescent current 3x AC outlets (3500W max)
DC Outlets 3x USB-C | 3x USB-A
3x 12V Cigarette ~150W
2x 50A input / outputs
1x 175A input / outputs
1x 15W wireless charger
AC charger 100V-250VAC 50-60Hz
40A at 14.6V 600W
DC DC MPPT 700W | up to 90VDC input
DC DC charger 30A charge 8-33VDC input
Humidity 10-90%
Operating Temp -10 to 50DegC
H3500P
12.8V | 300Ah | 3840Wh

SAFETY AND LEGAL
Your 100 % satisfaction is our goal. We realise that every customer and circumstance is unique. If you have a
problem, question, or comment please do not hesitate to contact us. We welcome you to contact us even after
the warranty and return time has passed.
Each product manufactured by Sterling Power comes with at least a 2 year limited factory warranty. Certain
Products have a warranty period of time greater than 2 years. Each product is guaranteed against defects in
material or workmanship from the date of purchase. At our discretion, we will repair or replace free of charge any
defects in material or workmanship that fall within the warranty period of the Sterling Power product. The
following conditions do apply:
- The original receipt or proof of purchase must be submitted to claim warranty. If proof cannot be located a
warranty is calculated from the date of manufacture.
- Our warranty covers manufacture and material defects. Damages caused by abuse, neglect, accident,
alterations and improper use are not covered under our warranty.
- Warranty is null and void if damage occurs due to negligent repairs.
- Customer is responsible for inbound shipping costs of the product to Sterling Power either in the USA or
England.
- Sterling Power will ship the repaired or warranty replacement product back to the purchaser at their cost.
If your order was damaged in transit or arrives with an error, please contact us ASAP so we may take care of the
matter promptly and at no expense to you. This only applies for shipping which was undertaken by our company
and does not apply for shipping organised by yourself. Please do not throw out any shipping or packaging
materials. All returns for any reason will require a proof of purchase with the purchase date. The proof of
purchase must be sent with the returned shipment. If you have no proof of purchase call the vendor who supplied
you and acquire the appropriate documentation.
To make a claim under warranty, call our customer care check telephone numbers on www.sterling-power.com
or www.sterling-power-usa.com. We will make the best effort to repair or replace the product, if found to be
defective within the terms of the warranty. Sterling Power will ship the repaired or warranty replacement product
back to the purchaser, if purchased from us.
Please review the documentation included with your purchase. Our warranty only covers orders purchased from
Sterling Power. We cannot accept warranty claims from any other Sterling Power distributor. Purchase or other
acceptance of the product shall be on the condition and agreement that Sterling Power USA LLC and Sterling
Power LTD shall not be liable for incidental or consequential damages of any kind. Some states may not allow
the exclusion or limitation of consequential damages, so, the above limitations may not apply to you.
Additionally, Sterling Power USA and Sterling Power LTD neither assumes nor authorizes any person for any
obligation or liability in connection with the sale of this product. This warranty is made in lieu of all other
obligations or liabilities. This warranty provides you specific legal rights and you may also have other rights,
which vary from state to state. This warranty is in lieu of all other, expressed or implied.
Copyright © 2024 Sterling Power. All rights reserved.
Reproduction, transfer, distribution or storage of part or all of the contents of this document is strictly prohibited. If
you wish to use all of this document, or excerpts from it, Sterling Power must be contacted.
Sterling Power can not accept liability for:
Ÿconsequential damage due to use of this device
Ÿpossible errors in the manuals and the results thereof
Please do not modify the device unless you have been instructed to do so by Sterling Power directly. Product
modification shall be done at Sterling when needed. Warranty shall be voided if personal attempts are made to
modify the device without Sterling’s approval.
Warranty and Terms
Copyright and Plagiarism
Liability
Device Modification
LEGAL GUIDELINES
SAFETY AND LEGAL 04
STERLING
POWER

SAFETY AND LEGAL
Hardy is versatile and does not have one specific use. Its uses are multifaceted. We do implore the user to keep
within the specs of the Hardy.
Ensure that the mains supply and battery leads are disconnected before transporting or moving the unit. No
liability can be accepted for damage in transit once equipment has been unpackaged. Store the product in a dry
environment, between –20°C to 60°C.
Refer to the battery manufacturer's manual for information on transportation, stowage, charge rates, recharging
and battery disposal for your battery care.
The device must be switched off during maintenance and all cables removed from the direct feed to or from the
unit. It must also be protected against unexpected switching off. Remove battery connections and ensure unit is
off. If repair is required, only use original parts. Unauthorised attempts to repair Sterling units will lead to the
warranty being voided. Only someone with adequate understanding of electronics and the unit itself should
attempt a repair.
Ensure your connections are good and clean and aim to protect your unit from humidity and water ingress.
Electrical appliances can be heavy. Please do not lift heavy units unassisted.
Ensure that your product is correct for your intent. 12V battery. Incorrect use can lead to damage.
Orientation is not critical to unit function, however may affect water ingress rating.
Install device in a well ventilated space for cooling purposes.
Do not expose the unit to snow, rain, water, spray, condensation, pollution etc, unless it is a waterproof unit. If it is
a waterproof unit, only expose it to situations it is correctly rated for.
Do not cover or obstruct the ventilation.
Device connects to common negative. Common negatives must be earthed.
In case of fire, use fire extinguisher equipment suitable for electrical fires.
Avoid all possibilities of reverse polarity or short circuiting.
Check cabling and connections frequently and ensure the connections are sufficient.
Always protect DC cabling with the appropriate fusing.
Ensure the unit is adequately and safely mounted to prevent displacement and damage.
Always use a professional to install electrical products.
Ensure the product is correctly set up for your battery.
Keep out of reach of children
CROSS VOLTAGE THRESHOLD BATTERY TO BATTERY CHARGERS MUST BE INSTALLED WITH CARE
A COMMON NEGATIVE IS PARAMOUNT TO OPERATION, HOWEVER, BE INCREDIBLY CAREFUL NOT TO
SHORT CIRCUIT OR REVERSE POLARITY ANY EQUIPMENT OR CABLE.
All electrical appliances carry the risk of electrical shock. This equipment is designed to be used in combination
with a permanent energy source (the battery). Always isolate the DC before performing any maintenance or
inspection.
Do NOT remove the panelling to inspect the internals unless expressly told to by Sterling. This is not a product
designed to be user-serviced.
Do NOT use the device in situations where there is danger of gas / dust / vapour explosions, or around potentially
flammable produce.
Product Guidelines
Transport and Storage
General Maintenance
Safety Precautions
Cross Voltage Chargers
READ THIS
WARNING :
SAFETY GUIDELINES
SAFETY AND LEGAL 05
STERLING
POWER

WHAT’S WHAT
STERLING
POWER
PRODUCT INFORMATION
DIAGRAM SHOWING WHAT EVERYTHING IS 06
FRONT
SIDE
A
BC
D
E
F
GH
I
J

HIGH POWER PORTABLE POWER PACK BREAKDOWN
STERLING
POWER
Summary
A
USB + USB-C PORTS
B
POWER SWITCH
C
DISPLAY SCREEN
D
AC ON/OFF SWITCH
E
3500W INVERTER SOCKETS
F
175A DC CONNECTION
G
2x 50A DC CONNECTIONS
H
30A DC/DC CHARGER
I
18-90VOC 700W SOLAR REG
MOUNTING BRACKETS - J
UNPICTURED
Included Accessories
230V Charger (Prewired)
Floor mounting brackets
Pre-wired Solar Socket (MC-4)
Spare 50A sockets
Ignition feed cabling
Pre wired Engel socket
175A Socket (Jump Leads)
Anderson Dust/safety covers
HARDY
IN MORE DETAIL 07
The Hardy has an incredible collection of features- it really is an entire vehicle power system in one box. To help
you understand its use we’ve broken it down into a few of its main parts and features- so you can be as confident
as we are that it’s the perfect item for you.
The top row of three contacts includes 3x USB and USB-C/PD charge/power ports with easily accessible
ON/OFF switches besides them. This can be used to power LED lighting, phone chargers and a wide array of
other USB powered items. The bottom row incorporates 2x 12V DC cigarette sockets and 1x Engel socket,
allowing an even bigger range of items to be powered.
A large, obvious and simple to understand power switch for the Hardy. Turn it on when you need it, turn it off when
you’re done.
The screen gives you all the information that could be of use to you; remaining capacity, overall state of charge,
actual power in motion (both in Watts and Amps). Consider this your onboard battery monitor.
A simple and obvious button-switch to turn ON/OFF your AC sockets at leisure. The LED backing of the switch
makes it obvious whether the plugs should be live or not.
The 2x230VAC sockets on the Hardy can power more than you would expect. The Hardy has an integrated
pure sine 3500W inverter. Each individual plug is rated to a normal 13A/3KW fuse, but with a 3.5KW
continuous rating and a 5KW peak, it’ll run more than you think. Final model will have an RCD installed.
This is the primary DC contact line using a 175A rated Anderson style connector and fused to 175A. Through
here you can easily power a large range of DC appliances, connect higher powered DC chargers (like our
Bb12120) or even consider connecting another battery bank (if it’s of equivalent charge) to extend your battery
capacity.
These two smaller grey Anderson style sockets are similar to (F) but rated to 50A each, instead of 175A. The
same rules apply, though. If you have a <50A charger available, or 50A DC appliances that you want to power,
plug them right in.
The blue Anderson style socket is for the in-built DC/DC charger. When paired with a D+ ignition feed it will draw
up to 30A from this blue socket connection, normally connected to an alternator circuit so you can charge while
you drive.
The yellow Anderson style socket is for our solar regulator. With a VOC range of 18V-90VDC and a 700W upper
limit on how much can be harvested, you’ve got a better system than most off-the-shelf regulators already built
in. All you need to do is connect your PV circuit (either from the roof panels, or by considering our CSP range of
deployable solar panels) and let the sun do the work for you.
Mounting bracket connections points - on both sides. Brackets are provided.
On the top of the Hardy unit, there is a 15W Wireless/Induction phone charger, making it a perfect place for your
phone.
14.6V 230VAC mains charger (40A)
Includes 4x Hex screws to connect to Hardy body and 4x wood screws for floor/base connection.
Yellow 50A Anderson Socket with Mc4 connector fitted cable
Spare Anderson sockets (1x Yellow, 1x Blue, 2x Grey - Includes terminals)
A simple plug and ring terminal for the Ignition contact on the Hardy
As described
175A Anderson Socket with large Jump Leads for a DC connection
Spare covers for the Anderson sockets if unused- to protect against dust or corrosion.

CHARGING UP HARDY
STERLING
POWER
From 230VAC
(mains)
From Alternator / input battery
charging when driving along
From Solar panels
Other
Using the 3 provided grey
sockets allow for flexibility and
the ability to either add power
into the battery or withdraw
power. However, the current
must never exceed the rating of
the connectors.
PRODUCT INFORMATION
CHARGING UP HARDY 08
The Hardy comes with a 40A mains charger. Simply plug the charger into a 3 pin socket and the other end via the
50A Anderson socket into one of the 2x 50A sockets on the Hardy’s side. Ensure the red isolation switch is in the
‘on’ position. The charger should begin charging immediately.
To charge the Hardy up whilst driving along in either a vehicle or boat, simply connect the Hardy up to the starter
battery or leisure battery. Feed a 10mm2 cable via the Anderson style socket into the blue connector. The blue
connector leads to an internal 30A DC DC charger. The internal DC DC charger provides the correct charging
profile to the battery, so, you do not need to worry about any settings. Max voltage is 33V input. So, shall work
with 12V or 24V input batteries.
The only requirement is to feed a switchable signal to ignition terminal on the corner of the Hardy. For the 30A
charger to work, the signal must be a live voltage ~12V. With either 0V signal or no signal feed connected the 30A
DC DC charger will not work.
To charge the Hardy up from solar, simply connect the Hardy up to your panel. You do NOT require a solar
regulator as there is one built in. Ensure open circuit voltage is <100VDC. Shall operate best between 20V-
90VDC. Maximum harvest is 700W ~50A at 14V.
230VAC
14.6V 40A DC
Mains charger
+ +
-
-
50A connector | 50A fuse
input | output
50A connector | 50A fuse
input | output
+
-
switchable 12V (ignition or D+)
+
-
+ +
+
-
--
50A connector | 50A fuse
input | output
50A connector | 50A fuse
input | output
175A connector | 200A fuse
input | output
The grey sockets on the Hardy provide no
current limit. Therefore, anything going in or
out of these sockets must be within the
current rating of the connector. They are
fused, for protection. Only current limiting
chargers or suitable amperage loads are to
be connected to these grey connectors.

USING HARDY POWER
STERLING
POWER
Inverter
USB-C and USB-A
Cigarette 12V socket
+ Engels socket
15W Wireless Charging Pad
PRODUCT INFORMATION
DISCHARGING HARDY 09
The Hardy comes with a 3500W (max) pure sine wave inverter. Running at full power a H3500 would last 20-
30mins. A H3500P would last double this. There are 3x AC outlets on the side of Hardy to take the power. A
standard UK plug is 13A, therefore, you are limited to about ~3000W per socket. If AC is required, ensure the AC
on/off switch in enabled. There shall be a blue halo illuminate around the switch, if ‘on’.
There are 3x sets of USB ports on the side of the Hardy. There are 3x USB-C rated at 18W. There are also 3x
USB-A rated at 10W. Press the on button to engage.
There are 2x standard 12V cigarette style sockets - with 15A fuses.
There is 1x Engel socket - this is ideal for connecting fridges to, as it gives a firm connection.
Standard 12V Standard 12V Engel 12V
This 15W wireless induction phone charger is on the top of Hardy. Place phone in the centre. It should operate
automatically.
AC on / off
USBC/PD
USB 3
On/Off
USB-C
On/Off
USB-A
USBC/PD
USB 3
On/Off
USB-C
On/Off
USB-A
USBC/PD
USB 3
On/Off
USB-C
On/Off
USB-A

THE SCREEN
STERLING
POWER
Main screen home page
Settings | Menu screen
Generally, little to nothing needs
changing on this screen.
PRODUCT INFORMATION
70%
Time remaining
0000.41 min
-256.48
AMPS
12.7
BATT V
3251
WATTS
Depiction of battery
state of charge
State of Charge
%
Net power
in / out of battery
Battery voltage
Net current
in / out of battery
return to home
right in settings
up in settings
settings
MAX VOLT(V) MIN VOLT(V) FULL VOLT(V)
CAPACITY (Ah) ALARM (Ah) LCD ON (MIN)
14.8 11.0 14.4
150 10 001
Max Voltage
If this voltage is exceed, Hardy
shall beep. High voltage protection.
No need to change.
Full Voltage
When this voltage has been
reached the battery is full.
No need to change.
Min Voltage
If this voltage or lower is met, Hardy
shall beep. Low voltage protection
Alarm (Ah)
If the remaining capacity hits, or
goes below this value, Hardy shall beep. Low capacity warning.
Can be adjusted with up arrow and press settings button to confirm.
Capacity (Ah)
This value is set to what the Ah capacity
of the internal battery is.
No need to change.
LCD ON (MIN)
This is the length of time the screen stays on after use.
Adjust accordingly using up arrow, then press settings button.
return to home
right in settings
up in settings
settings
DISPLAY SCREEN + SETTINGS 10

THE APP
STERLING
POWER
Use the QR code to locate app
Or Type in Licitti in Play / App
Store
icon image
Once downloaded open the app
and locate the Hardy signal.
Ensure Hardy is turned on.
Once selected this screen should
appear on your phone / device.
The data simply mirrors from the
Hardy on to your phone
Adjusting settings
It is often easier to make
adjustments to the Hardy
settings via the phone app. If you
wish to make changes, please
ensure to make a note of what
the defaults were.
When you want to enable the
change, ensure you press
SYNCHRONIZE
PRODUCT INFORMATION
150Ah
PlayStore AppStore
App Download
DISPLAY SCREEN + SETTINGS 11