Technaxx TX-270 User manual

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Model: TX-270; Article No. 5117; 10/2023
Technaxx® * User Manual
Flexible Solar Balcony Power Plant 600W WiFi
TX-270
Before using the appliance for the first time, please read the instructions for use and
safety information carefully.
This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capacities, or by persons lacking in experience or
knowledge, unless they are supervised or instructed on the use of this device by a
person responsible for their safety. Children should be supervised to ensure they do
not play with this device.
Keep this user manual for future reference or product sharing carefully. Do the same
with the original accessories for this product. In case of warranty, please contact the
dealer or the store where you bought this product.
Enjoy your product. * Share your experience and opinion on one of the well-
known internet portals.

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Model: TX-270; Article No. 5117; 10/2023
Table of Contents
Important notes at the start ................3
Explanation of the pictograms used 3
Note ...............................................4
Safety instructions..........................4
Intended use ..................................5
Assembly, installation and electrical
connection .........................................6
Caution measures during installation
.......................................................6
Qualified personnel ........................6
Disclaimer ......................................6
Features ............................................7
Product details...................................7
Package content:............................7
Product overview............................7
PV Micro Inverter 800W HMS-800W-
2T...................................................7
Preparation ........................................8
Requirements for the operation of a
photovoltaic system........................8
Connecting the micro inverter ............9
Connect the solar panels (DC
connection)...................................10
Cable guide..................................10
Connecting the micro inverter to the
AC grid (AC connection)............... 11
Mounting ..........................................11
General hints ................................11
Balcony.........................................11
Fence............................................11
Others...........................................11
First commissioning..........................12
LED status........................................12
Troubleshooting................................13
WiFi configuration.............................14
Get the App...................................14
Webpage ......................................15
Technical specifications....................16
Inverter 800W HMS-800W-2T.......16
Appendix ..........................................17
Determining the line reserve .........17
Load capacity of copper lines........18
Determination of the line reserve ..19
Support ............................................20
Care and maintenance .....................20
Warranty...........................................20
Solar panel ...................................20
Inverter .........................................20
Declaration of Conformity.................20
Disposal ...........................................20

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Model: TX-270; Article No. 5117; 10/2023
Important notes at the start
Explanation of the pictograms used
Read the user manual.
Warning
Caution, risk of electric shock.
Caution, hot surface
Specifications subject to change without notice - please make sure you are using the
latest manual available on the manufacturer's website.
ATTENTION!
According to the German Federal Network Agency, installations exceeding
600W may only be carried out by electrical contractors. In addition, a
corresponding report must be made to the network operator! Therefore,
contact a specialist electrical company if your installation exceeds 600W!

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Model: TX-270; Article No. 5117; 10/2023
Note
⚫ Only use the product for purposes due to its intended function ⚫ Do not damage
the product. Following cases may damage the product: Incorrect voltage, accidents
(including liquid or moisture), misuse or abuse of the product, faulty or improper
installation, mains supply problems including power spikes or lightning damage,
infestation by insects, tampering or modification of the product by persons other than
authorized service personnel, exposure to abnormally corrosive materials, insertion of
foreign objects into the unit, used with accessories not preapproved. ⚫ Refer to and
heed all warnings, precautions and safety instructions in the user manual.
Safety instructions
⚫ Read the user manual carefully. They contain important information on the use,
safety and maintenance of the device. Keep the user manual in a safe place and pass
them on to subsequent users if necessary.
⚫ Before installing or using the Solar Balcony Power Plant, please read all instructions
and warnings in the technical documentation, on the microinverter and on the solar
modules.
⚫ The device may only be used for its intended purpose in accordance with this user
manual.
⚫ Observe the safety instructions during use.
⚫ Before commissioning, check the device and its connecting cable as well as
accessories for damage. Do not use the device if it shows visible damage.
⚫ Operate the device only from household power sources. Check whether the mains
voltage specified on the type plate corresponds to that of your mains supply.
⚫ Perform all electrical installations in accordance with local regulations (including
VDE).
⚫ When installing and operating the plug-in photovoltaic system, observe the national
legal regulations and the connection conditions of the grid operator.
In particular, DIN VDE V 0100-551-1 (VDE V 0100-551-1), VDE AR-N 4105:2018-11,
DIN VDE 0100-712, DIN VDE 0100-410 and DIN VDE V 0628-1 (VDE V 0628-1).
⚫ Note the information on determining the line reserve at the end of these operating
instructions.
⚫ Note that the housing of the micro inverter is a heat sink and can reach a
temperature of 80 degrees Celsius. To reduce the risk of burns, do not touch the
housing of the micro inverter.
⚫ Do not squeeze the power cord, do not pull it over sharp edges or hot surfaces; do
not use the power cord for carrying.
⚫ If the power cord of this device is damaged, it must be replaced by the manufacturer
or its customer service or a similarly qualified person in order to avoid hazards.
⚫ The appliance is intended for household or similar use only. It must not be used for
commercial purposes!
⚫ Make sure that the device is well secured during operation and cannot be tripped
over by cables.
⚫ Never use the device after a malfunction, e.g. if the device has been dropped into
water or damaged in any other way.

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Model: TX-270; Article No. 5117; 10/2023
⚫ The manufacturer assumes no responsibility in the event of incorrect use resulting
from failure to follow the instructions for use.
⚫ Modification or alteration of the product will affect the product safety. Caution: Risk
of injury!
⚫ All modifications and repairs to the device or accessories may only be carried out
by the manufacturer or persons expressly authorized by the manufacturer for this
purpose.
⚫ Make sure that the product is operated from a power source that is easily accessible
so that you can quickly disconnect the device from the mains in case of an emergency.
⚫ Never open the product without authorization. Never carry out repairs yourself!
⚫ Handle the product with care. It can be damaged by shocks, impacts or falling from
even a low height.
⚫ Keep the product away from extreme heat.
⚫ Never immerse the product in water or other liquids.
⚫ Technical changes and errors excepted!
Warning!
⚫ Do not tamper with or manipulate the micro inverter or other parts of
the equipment under any circumstances.
⚫ Risk of damage due to improper modifications!
⚫ Keep all contacts dry and clean!
Caution Risk of electric shock!
⚫ When operating this device, certain parts of the device are under
dangerous voltage, which can lead to serious physical injuries or death.
Therefore, follow the following instructions to minimize the risk of injury.
⚫ Disconnect the plug connection only in a de-energized state!
⚫ Before carrying out visual inspections and maintenance work, check that the power
supply is switched off and secured against being switched on again.
Caution, hot surface!
⚫ The surface of the micro inverter can become very hot. Touching the
surface can cause burns.
⚫ Mount the micro inverter in such a way that accidental contact is not
possible.
⚫ Do not touch hot surfaces. When working on the micro inverter, wait until the surface
has cooled down sufficiently.
Intended use
The micro inverter may only be operated with a fixed connection to the public power
supply. The micro inverter is not intended for mobile use. Modifications to the micro
inverter are generally prohibited. For changes in the environment, you must always
consult a qualified electrician. Assembly, installation and electrical connection.

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Model: TX-270; Article No. 5117; 10/2023
Assembly, installation and electrical connection
Warning!
⚫ All work including transport, installation, commissioning and
maintenance must be carried out by qualified and trained personnel.
⚫ The electrical connection to the central building services may only be
carried out by a licensed electrician.
⚫ Do not connect the micro inverter to the operator grid until you have fully
implemented the installation process and have received confirmation / approval from
the electricity network operator.
⚫ If you mount the micro inverters at a great height, avoid possible fall risks.
⚫ Do not insert electrically conductive parts into the plugs and sockets! Tools must be
dry.
Caution measures during installation
⚫ Installation must be performed with the unit disconnected from the grid and with the
solar panels shaded and/or insulated.
⚫ Install the micro inverter and all DC connections in a suitable location, for example
under the solar panel, to avoid direct UV/sunlight exposure, rain exposure, snow
accumulation, etc. In any case, sufficient air circulation for cooling must be ensured.
⚫ Install the micro inverter in such a way that at least 2cm distance to the nearest
surface is maintained. Otherwise, the micro inverter may overheat.
⚫ Do not install in locations where gases or flammable materials may be present.
Qualified personnel
An adequately informed person or a person supervised by a person with electrical
engineering skills and knowledge so that he or she recognizes the risks and avoids
the hazards caused by electricity. For safety reasons, in this manual 'Qualified
Personnel' means that this person is familiar with safety requirements, cooling
systems and EMC and that this person is authorized to power, ground and attach
equipment, systems and circuits according to existing safety procedures. The micro
inverter, accessories and connected systems may only be commissioned and
operated by qualified personnel.
Disclaimer
⚫ In no event shall Technaxx Deutschland be liable/responsible for any direct, indirect
punitive, incidental, special consequential danger, to property or life, improper
storage, whatsoever arising out of or connected with the use or misuse of their
products. ⚫ Error messages may appear depending on the environment it is used in.

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Model: TX-270; Article No. 5117; 10/2023
Features
⚫ Mount on balcony, fence and more
⚫ Easy installation: plug in, start, save energy
⚫ Flexible solar modules (without glass - EVA material)
⚫ Lightweight panels and compact microinverter
⚫ Suitable for feeding electricity into the 230V household grid
⚫ Maximum inverter feed-in power of 800W
⚫ Ideal for covering the base load of your home during the day
⚫ Power tracking possible via app and web view
⚫ VDE compliant
Product details
Package content:
1x 800W PV microinverter
6x flexible solar module 105W (630W)
60x cable tie
36x steel band
2x MC4 Y-Splitter
4x 2m MC4 extension cable
2x 3m MC4 extension cable
1x AC connection cable
1x user manual
Product overview
PV Micro Inverter 800W HMS-800W-2T
1
AC connection to power socket (BC05)
4
Antenna (WiFi)
2
Mounting hole
5
DC connection solar panel (MC4)
3
Ground connection
6
Indicator LED

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Model: TX-270; Article No. 5117; 10/2023
Preparation
Requirements for the operation of a photovoltaic system
⚫ Permission from the owner or owners' association if you are not the owner yourself
⚫ Wieland socket (recommendation), permanent connection or Schuko socket
⚫ RCD in the fuse box (standard nowadays)
⚫ Socket, better protected outdoors
⚫ Electricity meter with backstop or bidirectional meter
ATTENTION!
The following requirements must be met in order to operate a photovoltaic
system.
⚫You must register your photovoltaic system with your responsible grid operator.
⚫In addition, a report must be submitted to the responsible authority (Market Master
Data Register (MaStR)).
⚫You must have ensured that an appropriate and sufficiently dimensioned feed-in
socket is already available.
⚫ Meter replacement required: A bi-directional meter must be present or depending
on what your electricity provider specifies. Simple electricity meters are often not
sufficient.
⚫If necessary, the consent of the landlord is required.
⚫ If you are unsure, pleasehave the local conditionschecked, if necessary, or contact
your network operator for information.

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Model: TX-270; Article No. 5117; 10/2023
Connecting the micro inverter
It may only be necessary to connect the solar modules (DC) to each other and to the
micro inverter. On the AC side, only the connection with the enclosed connection
cable must be made. A Wieland plug connection is recommended here according to
VDE. A Schuko plug connection with a Schuko socket is also possible.
CAUTION!
Observe all local regulations and restrictions during installation.
CAUTION!
The external protective grounding conductor is connected to the protective
grounding conductor terminal of the micro inverter via AC connection. When
connecting, connect the AC terminal first to ensure grounding of the micro
inverter. Then connect the DC terminals. When disconnecting, disconnect the
AC first by opening the branch circuit breaker but keeping the protective
grounding conductor in the branch circuit breaker connected to the micro
inverter. Then disconnect the DC inputs.
CAUTION!
Do not, under any circumstances, connect the DC input if the AC connection
is not connected.
CAUTION!
Install disconnect devices on the AC side of the micro inverter.
CAUTION!
It is strongly recommended to installsurge protectors in the appropriate meter
box.
CAUTION!
You should not use an AC residual current device to protect the
corresponding circuit to the micro inverter, even if it is an outdoor circuit. None
of the small residual current devices (5~30 mA) are designed for regeneration
and will be damaged if regeneration occurs. The same is true for AC arc fault
circuit breakers. They are not evaluated for regenerative power and could be
damaged if regenerated with the output of a solar micro inverter.

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Model: TX-270; Article No. 5117; 10/2023
Connect the solar panels (DC connection)
Connect the solar panels DC cables to each other on one side and the cable tree to
the DC input side of the micro inverter as shown in the cable guide.
Cable guide
Panel shematic connection to the micro inverter. (not scaled)
Important! To achieve a proper function solar power system, connect the plugs in the
order shown.
The 800W Micro Inverter has two pairs of MC4 connectors. These two connectors are
for two solar panels connected in series on one side and 4 panels mixed connected
on the other side. Two panels connected in series as one set and both sets connected
in parallel.
To connect the panels, we recommend the following steps:
•Check the length of your balcony or fence and consider the direction of installation.
•Plug the Y-shaped cable into the most convenient side of where the 4 panels should
be placed according to the micro inverter.
•Put each 2 panels together at one side. You now have 3 sets.
•Place the sets in position and secure them temporarily.
•Attach the extension cables as required to the best fitting solution.
•Connect the panels to the extensions and the micro inverter.
•Fix the panels using the accessories supplied. (cable tie or metal band)
•Connect the Betteri socket cable to the micro inverter and plug it into the mains.
Connect the DC connection cables of the micro inverter to the matching counterpart
of the (extension cable / y-splitter) solar panel. Plug the pair of connectors together
until you hear a "click" sound. The connectors of some solar panels have the polarity
(+, -) printed on them, which is valid for the panels. The DC cable of the micro inverter
with the plus marking (+) is connected to the - pole of the panel, the negative marked
cable (-) to the + pole. Make sure that the polarity is correct.
Note: When plugging in the DC cables, if the AC cable is already plugged in, the micro

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Model: TX-270; Article No. 5117; 10/2023
inverter LED should immediately flash green and start synchronizing with the grid
within 2 minutes. If the AC cable is not plugged in, the red LED will flash continuously
and repeat this until the AC cable is plugged in (see chapter LED Status).
Connecting the micro inverter to the AC grid (AC connection)
A maximum 1x 600W may be connected to an EU / 50Hz / 230V installation
with 16A automatic circuit breaker.
The connection to the mains is made with a suitable power cable. Only use 3-core
cables that are also approved for outdoor installation and have a conductor cross-
section adapted to the amperage (preferably 1.5mm² or 4mm²).
Fasten the connection cables to the mounting rail using UV-stable cable ties in such
a way that the cables are protected from rain and sun and, in particular, the plug
connections cannot lie in a puddle of water. To connect the micro inverter and the
connection cable, the pre-assembled AC plug-in system in combination with an AC
cable and assembled BC05 IP68 connection socket or the AC string input/output can
be used, depending on the delivery variant. To mount a Wieland connector, the pre-
assembled BC05 IP68 connector system must be removed.
Note: Other plug connections / systems may be possible, provided they are suitable
for outdoor use and the current levels involved.
Mounting
Observe the following instructions for the corresponding installation.
General hints
⚫ Before you start mounting, check the solar module, the inverter and all cables for
visual damage.
⚫ Do not stand on the module or the cables. To prevent grease stains on the module,
avoid contact with your hands on the glass surface and ideally wear work gloves.
⚫ Place the solar module face down on a clean, flat, soft surface.
⚫ Write down the model and serial number of the components [inverter, solar
module(s)] and keep the numbers. In the event of a defect, we will need the numbers
for unique identification.
Balcony
⚫ The solar modules can be mounted onto balconies with rails and handrails only.
The balcony mounting material is attached as accessory:
- 60x cable ties in black for every hole in the panels
- 36x metal bands for every corner of the panels and the middle fixation
Fence
⚫ Follow the mounting according balcony mounting – refer to the status give. Use the
accessories provided to attach the system to the fence.
Others
⚫ For installation in places other than a balcony or fence, you can use screws or glue
the back of the unit to a flat surface.

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Model: TX-270; Article No. 5117; 10/2023
First commissioning
After mechanical and electrical installation of the solar power system, you can put the
system into operation. There should be enough sunshine for this. The solar panels
need to produce at least a start voltage of 22V.
Initial state:
1. The micro inverter is connected to the solar panels
2. The microinverter is connected to the house mains via Wieland plug
(recommended) or Euro plug.
3. The cables are fixed protected from rain and sunlight
4. The feed line is connected to the mains via a circuit breaker
Proceed as follows:
1. Turn on the circuit breaker and any other switches that may be present.
2. Switch on the main AC switch.
3. The unit LED should begin flashing green after you turn on the AC circuit breaker.
See chapter LED status for more information.
4. The micro inverter starts feeding (grid synchronization) within 2 minutes if there is
sufficient solar radiation. The status LED indicates the basic function. You can check
the feed-in power with a suitable power socket energy meter* (*needs to be water
proof for outside use!).
5. If you have installed a feed-in meter, you can also use it to check the current feed-
in power or energy.
Note: When AC power is applied but the micro inverter is not started, approximately
0.2W of power can be measured for each micro inverter using a power meter. This
power is reactive power, not consumption from the utility grid.
LED status
The LED of each micro inverter provides information about the current status. All micro
inverters draw their supply voltage from the DC connector/solar panels.
Status during power up
The green LED will flash fast a few times. Then switch-on process usually takes up to
2 minutes. Following LED status can occur:
Flashing fast red (1s):
No AC connection
→ no grid feed
Flashing slow green (3s):
AC connection &
DC connection voltage lower 22V
→ no grid feed
Flashing fast green (1s):
AC connection &
DC connection voltage over 22V
→ grid feed
No LED Flashing/LED off:
No DC connection/solar panels
connected
→ no grid feed

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Model: TX-270; Article No. 5117; 10/2023
Status after the switch-on process
A fast green flashing LED indicates normal status and an active feed into the grid. If
the LED remains flashing red after 3minutes, this indicates an error with solar panel
voltage that is too low (below 22V) or a missing AC voltage.
The micro inverter can only start feeding (again) after the cause of the error has been
eliminated. The reason for this error could be a faulty solar panel connection / AC
connection or the connected grid exceeds / falls below the voltage / frequency range
of the micro inverter. If the LED shows no function or remains OFF, the most common
cause is that there is no connection to the solar panel or the solar panel voltage is far
below the start voltage.
Troubleshooting
Maintenance work and troubleshooting on the micro inverter may only be carried out
by qualified personnel. Modifications to the micro inverter are generally prohibited.
The micro inverter is potted, the electronics cannot be repaired. The HMS-800W-2T
micro inverter draws its supply voltage from the DC side. To restart the micro inverter,
the solar panels must be disconnected from the micro inverter. The start-up process
usually takes place within 2 minutes. For troubleshooting purposes, perform the
following steps in the order listed:
1. Check that all AC fuses are turned ON.
2. Check all connection cables for external damage.
3. Check all AC side connections for damage or connection errors.
4. Measure at the connection points. The applied mains voltage must not exceed or
fall below the AC voltage range of 180-275V.
5. Restart the micro inverter by disconnecting and reconnecting the DC power / solar
panels. A normal start-up process should be indicated by a green LED (see LED
status).
CAUTION!
Never disconnect the DC cables while the micro inverter is generating power.
6. Measure the voltage of the solar panel to the micro inverter with a suitable multi-
meter. The required starting voltage of the micro inverter is above DC22V.
7. Check the MC4 connectors of the micro inverter and solar panel(s). Damaged DC
connections must be replaced.
8. If necessary, check with your grid operator whether the grid frequency matches the
frequency range of the micro inverter.
CAUTION!
Do not attempt to repair the micro inverter.
If the above steps do not solve the problem, contact our support or an
electrician.
The AC connection on the micro inverter cannot be replaced/repaired. If the
cable has been damaged, the device should be disposed of.

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Model: TX-270; Article No. 5117; 10/2023
Unless otherwise specified, maintenance work must be carried out with the
equipment disconnected from the mains (mains switch open) and the solar
panels covered, or insulated.
Do not use rags or corrosive products for cleaning that could corrode parts
of the equipment or cause electrostatic charges.
Avoid temporary repairs. All repairs should be made only with original spare
parts.
Each micro inverter should be protected by a circuit breaker, but central
disconnect protection is not required unless specified by national standards,
or by the responsible network operator.
WiFi configuration
1. The micro inverter of the solar table should be already installed and connected with
the house grid. Plugged into a power socket.
2. The maximum communication distance between micro inverter and router is 20m
in open space. Walls, roofs, or other obstacles in between will affect the signal and
reduce the communication distance in actual installations.
Get the App
To download the App S-Miles Installer from the App-Store or the Google Play Store
search for “S-Miles Installer” or scan the QR-code below.
[iOS 13.0 or above; Android 10.0 or above (10-2023)]
APP icon
iOS
Android
1. To register click on “No Account”, check for “DIY” and click on “register”. Fill out the
registration form with the required information. Then tap the register button.
2. To connect the micro inverter to the WiFi router, connect your Smartphone with the
AP (WiFi=DTUBI-xxxxxxxx) of the micro inverter. Use the WiFi password on the back
of the inverter.
Go to O&M page (bottom middle icon ). Click on Network configuration and the APP
connects with DTU.

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Model: TX-270; Article No. 5117; 10/2023
Configure the WiFi of your micro inverter.
3. Back on the main page, press on “+” to create a new plant. Follow the instruction
in the APP to create a plant. Follow the APP to fill in the required information.
Note: It takes up to 30 minutes until the first values are shown in the APP.
If you need further assistance, read the detailed TX-247 manual on
our homepage: https://www.technaxx.de/products/ and search
for 'TX-247'.
Webpage
You can view the inverter’s operating details on the computer web page by accessing
the S-Miles Cloud (Hoymiles Monitoring Platform) at https://world.hoymiles.com.
Therefor use your login which you created via S-Miles Installer App registration.
•Enter account = Login account, username created by app.
•Enter password = Password created for app login.
Note: You will need to be connected to the Hoymiles DTU WiFi access point by APP
for first registration and configuration.

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Model: TX-270; Article No. 5117; 10/2023
Technical specifications
For the technical specifications of the solar module, please refer to the enclosed data
sheet.
Inverter 800W HMS-800W-2T
DC-input
Recommended panel power (W)
320-540 (per panel)
Max. number of panels
2
Panel connection
MC4
MPPT voltage range (V)
16-60
Starting voltage (V)
22
Operating voltage range (V)
22-60
Max. input voltage (V)
60
Max. input current (A)
2x 14
Max. input short-circuit current (A)
2x 25
AC-output
Rated output power (VA)
800
Rated output current (A)
3.63 at 220V
3.48 at 230V
3.33 at 240V
Rated output voltage/range (V)
220/180-275
230/180-275
240/180-275
Rated frequency/rated frequency range
(Hz)
45-55 (under 50Hz @ 220 V & 230 V)
Power factor
>0.99 standard
0.8 leading......0.8 delayed
Output current harmonic distortion
≤3%
Efficiency, safety and protection
CEC weighted efficiency
96.70%
MPPT rated efficiency
99.80%
Nightly power consumption (mW)
<50
Mechanical data
Ambient temperature range (°C)
-40~+65
Storage temperature range (°C)
-40~+85
Dimensions (WxHxD) mm
261×180×35,1
Weight (kg)
3.2
Protection class
outdoor (IP67)
Cooling
Natural circulating air - no fans
AC output cable length (cm)
50

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Model: TX-270; Article No. 5117; 10/2023
Characteristics
Communication
Built-in Wi-Fi
Frequency band
2.4GHz
Radiated transmission power max.
69.2mW
Topology
Galvanically Isolated HF Transformer
Monitoring
Micro Toolkit or S-Miles Cloud
Compliance
VDE-AR-N 4105: 2018, EN 50549-1: 2019, VFR 2019, IEC/EN
62109-1/-2, IEC/EN 61000-6-1/-2/-3/-4, IEC/EN 61000-3-2/-3
App “S-Miles
Installer”
iOS 13.0 or above; Android 10.0 or above / EN, DE, FR, ES, IT,
NL, CZ, PL, PO (10-2023)
Appendix
Determining the line reserve
The PI Photovoltaic Institute Berlin in cooperation with the German Society for Solar
Energy (DGS), the University of Applied Sciences (HTW) Berlin have worked out in a
study that it is possible to feed in up to 2.6 amps (approx. 630 W, equivalent to 2 solar
modules) with plug-in solar devices in every household with circuit breakers without
any safety concerns, without having to make any changes to the house electrics.
However, there may be a deviation from the applicable standard for line loading. We
have described how to comply with the requirements of the standard and how to test
the line in this appendix. If mini solar systems feed into the existing final circuit, the
current load on individual cable sections may exceed the designed standard size. To
prevent overloading of the cables in the household, they are protected by a line circuit
breaker (LSS). This switches off automatically as soon as an overload occurs. As a
rule, several sockets and consumers are protected by a common line protection. Due
to the additional power of the mini solar system, the currents from the utility grid and
the mini solar system can now add up. However, the currents are not detected by the
line circuit breaker, so theoretically an overload can occur. You can use the following
formula to determine whether the existing line with your circuit breaker is sufficiently
dimensioned:
Iz indicates the current carrying capacity of the line, which should be greater than the
sum of the rated current of the protective device (circuit breaker in amperes) and the
generating equipment (power in amperes). Both Iz and Ig can be found in the following
table for the example application below.
Iz = In + Ig
Iz Permissible current carrying capacity of the line
In Rated current of the protective device (circuit breaker)
Ig rated current of the power generation system

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Model: TX-270; Article No. 5117; 10/2023
Load capacity of copper lines
Load capacity of copper cables and lines for fixed installation in buildings 1.5mm2
nominal cross-section; at ambient temperature 25°C, with 2 loaded cores*.
Installation method
On thermally
insulated
walls
In electrical
installation
pipes
On walls
In the air
Current carrying capacity Iz of
the conductors of the final
circuit in amperes
16,5
17,5
21
23
Maximum rated current Ig of the
power generation system with
16A circuit breaker
0,5
1,5
5
7
Maximum rated current Ig of the
power generation system with
13A circuit breaker
3,5
4,5
8
10
Photovoltaic system
one solar
module
two solar
modules
up to 3 ×
115W
from 4 ×
115W
max. current load in amperes
1.3
2.6
1.3
2.6
* The example from the table is based on two loaded copper lines with a nominal cross-section of 1.5mm2,
which reflects the line in a typical German household. In the case of a larger cross-section or a different cable
type, the permissible current-carrying capacity is different, so that this must be considered separately, in
accordance with DIN VDE 0298-4.

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Model: TX-270; Article No. 5117; 10/2023
Example before fuse replacement
Example after fuse replacement
(1)
Circuit breaker
(2)
electrical consumer
(3)
Mini solar system 600W
* max. permissible line load is 16.5A
Determination of the line reserve
If the cable is a copper cable with a core cross-section of 3×1.5mm2, then the cable
is designed for a continuous load of 16.5A (in thermally insulated walls at 25°C). The
free capacity is the difference of the line with 16.5A, minus the circuit breaker with
16A. The free capacity is therefore 0.5A in thermally insulated walls. If the solar power
exceeds the current of 0.5A, then the circuit breaker should be replaced with a smaller
one in order to comply with the requirements of the DIN VDE 2948-4 standard. By
exchanging the fuse for a smaller 13A fuse, 13A can now still be drawn from the power
grid, resulting in free capacity for the power line with the difference of 3.5A. The power
of the mini solar system could therefore be up to 805W. In the example (right half of
the picture), the power of the mini solar system is 2.6A/600W, which complies with the
permissible load.
Further safety instructions
⚫ Only connect the solar system to a permanently connected socket, never to a
multiple socket.
⚫ If you still have older screw fuses installed, it is mandatory to replace them from
16A to the next smaller fuse.

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Model: TX-270; Article No. 5117; 10/2023
Support
Service phone No. for technical support: 01805 012643 (14 cent/minute from German
fixed-line and 42 cent/minute from mobile networks). Free Email:
[e-mail]
The support hotline is available Mon-Fri from 9am to 1pm & 2pm to 5pm
Care and maintenance
Clean the device only with a dry or slightly damp, lint-free cloth.
Do not use abrasive cleaners to clean the device.
Warranty
Solar panel
25-year limited peak power warranty (80% power output)
12-year limited product warranty
Inverter
12-year limited product warranty
Declaration of Conformity
The EU Declaration of Conformity can be requested at the following
address: www.technaxx.de/ (in the lower bar "Declaration of Conformity").
Disposal
Disposal of the packaging. Sort packaging materials by type upon
disposal.
Dispose of cardboard and paperboard in the waste paper. Foils should be
submitted for recyclables collection.
Disposing of old equipment (Applies in the European Union and other
European countries with separate collection (collection of recyclable
materials) Old equipment must not be disposed of with household waste!
Every consumer is required by law to dispose of old devices that can no
longer be used separately from household waste, e.g. at a collection point
in his or her municipality or district. This ensures that the old devices are
properly recycled and that negative effects on the environment are
avoided. For this reason, electrical devices are marked with the symbol
shown here.