WATTSTUNDE® WS140SF SunFolder+ 140Wp solar bag for Mercedes-Benz Marco Polo / Horizon / Activity
- More off-grid freedom: 140 Wp of solar power for your batteries.
- Park in the shade: A 5-metre cable lets your panel catch sunlight.
- Easy to stow: Folds down to 560 x 440 x 22.5 mm.
- Quick connection: Anderson connectors link your solar panel to the charge controller.
Item no. 36464
The WATTSTUNDE® WS140SF SunFolder+ 140 Wp folding solar panel adds solar charging to a suitably matched battery system in your Mercedes-Benz Marco Polo, Horizon or Activity. You can orient the panel towards the sun independently of the vehicle, giving you more flexibility when choosing where to park.
More freedom to position the panel
The 5 m connection cable with Anderson connectors gives you room to position the panel away from the vehicle. You can set up the SunFolder outdoors or place it behind the windscreen while the vehicle is parked. Glass and shade can reduce output, so choose an unshaded position wherever possible.
Fold it away and plan your storage space
Folded, the panel measures 560 x 440 x 22.5 mm and weighs 4.05 kg, making it easy to assess the storage space needed on board. Unfolded, it measures 560 x 1325 x 7.5 mm.
Solar output in a compact format
The SunPower Back-Contact cells with over 24% cell efficiency provide solar output in a compact format. A bypass diode is integrated.
The stated maximum daily yield in summer is 840 Wh. Actual output depends on factors including solar irradiance, orientation and shading. The 140 Wp rating does not represent continuously available power.
Use outdoors in dry conditions
The robust Cordura fabric is designed for portable outdoor use. Protect the panel from rain, dew and moisture. Do not leave it outside overnight.
Check your charging connection before first use
A suitable solar charge controller is required to charge a battery. The 12 V module must match the controller's input specifications and your battery system. Pay particular attention to the 26.2 V open-circuit voltage and 6.65 A short-circuit current. An Anderson connector alone does not establish electrical compatibility with your installation.
Once a matching controller-side connection has been prepared, it can remain in place. To use the panel, unfold it, orient it towards the sun and join the Anderson connectors. Follow your charge controller's connection instructions. Whether additional adapters are needed depends on your existing wiring.
Technical data
| Module type | 12V module |
| Rated power (Pmpp) | 140 Wp |
| Max. daily yield (summer) | 840 Wh/d |
| Voltage (Umpp) | 22.3 V |
| Current (Impp) | 6.28 A |
| Open-circuit voltage (Uoc) | 26.2 V |
| Short-circuit current (Isc) | 6.65 A |
| Bypass diode | integrated |
| Cell efficiency | >24 % |
| Dimensions (folded) | 560 x 440 x 22.5 mm |
| Dimensions (unfolded) | 560 x 1325 x 7.5 mm |
| Connection cable | 5 metres |
| Weight | 4.05 kg |
What is the WATTSTUNDE® WS140SF SunFolder+ folding solar panel?
It is a folding 12 V solar module with a rated output of 140 Wp for portable charging of a suitably matched battery system. It features SunPower Back-Contact cells with over 24% cell efficiency, an integrated bypass diode and robust Cordura fabric.
How is the solar panel connected?
The 5 m connection cable uses Anderson connectors. A suitable solar charge controller is required for battery charging. A properly prepared connection can remain attached to the controller, allowing you to connect the panel via the Anderson connectors when needed. Follow the controller's connection instructions.
How can you check compatibility with your Marco Polo, Horizon or Activity?
Compatibility depends on the existing battery system, the solar charge controller's input specifications and the connections. Check the module specifications, particularly its 140 Wp rated output, 26.2 V open-circuit voltage and 6.65 A short-circuit current, alongside your battery's requirements. The vehicle model or an existing Anderson connector alone does not establish compatibility. An adapter may be needed depending on the wiring.
How much energy can the solar panel generate?
The rated output is 140 Wp. The stated maximum daily yield in summer is 840 Wh. Actual yield depends on sunlight, orientation and shading, and may be lower. A 140 Wp rating does not mean that 140 watts are continuously available.
Where can you position the solar panel?
In dry conditions, you can position the panel outdoors facing the sun within reach of the 5 m connection cable. It can also be placed behind the windscreen while the vehicle is parked. Glass and shading can reduce energy output.
What are the solar panel's dimensions and weight?
It measures 560 x 440 x 22.5 mm when folded and 560 x 1325 x 7.5 mm when unfolded. It weighs 4.05 kg.
What precautions are needed for rain, dew and overnight storage?
Despite its robust Cordura fabric, the panel must be protected from rain, dew and moisture. Do not leave it outdoors overnight, and keep sensitive electrical areas dry.
The order creation for optional installation service is done manually, in this case please do not order online.
| Brand | Wattstunde |
| Item No. | 36464 |
| Content | 1 piece |
| Condition | New |
| Weight | 4050 g |
| Customs tariff number | 85414300 |
| Manufacturer | WATTSTUNDE GmbH Bessemerstraße 3 21339 Lüneburg Germany vertrieb@wattstunde.de |
