Development and OEM manufacturing of solar modules as well as system components for autonomous energy supply
WATTSTUNDE GmbH
Bessemerstraße 3, 21339 Lüneburg · GermanyNew on Amplifa
About WATTSTUNDE
WATTSTUNDE GmbH was founded in 2014 and stands for solar technology in the field of autonomous energy supply. The company from Lüneburg develops and distributes components for mobile and stationary energy systems under the SOLA, TARA and NOVA product lines: solar modules (framed, semi-flexible and foldable), LiFePO4 and AGM batteries, MPPT charge controllers and pure sine wave inverters. For B2B customers, WATTSTUNDE as a manufacturer and specialist wholesaler offers OEM custom-made solar modules in which dimensions, junction box and module shape are defined project-specifically – for example round, square or with custom glass solutions. In addition, the company provides system planning and sizing of autonomous systems, system assembly with bill of materials and quotation, as well as project support for caravanning, marine, commercial vehicles and off-grid island systems. The products are developed in Lüneburg ('Engineered in Northern Germany'), with the solar modules partly manufactured according to an ISO-9001-certified process. The curated B2B portfolio also includes products from partners such as EcoFlow (Authorized Reseller), Victron Energy, Solara, Super B and Votronic; deliveries are also made internationally.
- Site
- Lüneburg
- Processes
- Solar module custom manufacturing (OEM production, Customized Solutions), Sizing & planning of autonomous solar systems (island systems, mobile applications), System assembly & project support (component selection, bill of materials, quotation), System planning and sizing of solar systems, OEM custom manufacturing of solar modules (Customized Solutions), Specialist wholesale for solar components, B2B shop for business customers, Support and project support
- Materials
- LiFePO4 (Lithium Iron Phosphate), AGM (Absorbent Glass Mat, lead-fleece), Monocrystalline solar cells (PERC Mono), N-Type Back Contact solar cells (ASBC), SunPower Maxeon solar cells, Shingled solar cells (PERC), Aluminium (hollow-chamber profile frame, anodized), Tempered/anti-reflective glass with lotus effect
- Certificates
- ISO 9001 (module manufacturing according to certified process), CE / RoHS / UN 38.3 (TARA Sync), ECE R10.6 (inverter)
- Founded
- 2014
- Industries
- Caravanning/Camping, Marine/Boatbuilding, Commercial Vehicles, Off-Grid/Island Systems, Home/Balcony Power Plants, Appliance and Vehicle Manufacturing (OEM)
- 01
System planning and sizing
- 02
OEM custom solar module manufacturing / component configuration
- 03
System assembly (bill of materials, quotation)
- 04
Delivery (also international)
- 05
Project support and assistance
Materials & Cell Technologies
LiFePO4 (Lithium Iron Phosphate)
Cell chemistry of the NOVA Base² and Core² battery series with integrated BMS and up to four interconnected battery packs.
AGM (Absorbent Glass Mat, lead-fleece)
Maintenance-free, cycle-resistant battery technology of the NOVA Lead series for caravans, boats and solar systems.
Monocrystalline PERC solar cells
Used in SOLA Frame Mono (approx. 20 %) and SOLA Flex Mono (>22 % efficiency) for mobile and stationary modules.
N-Type Back Contact solar cells (ASBC)
Anti-shading technology of the SOLA Frame Shadow series with cell-integrated bypass function against partial shading.
SunPower Maxeon solar cells (Back Contact)
High-performance cells with over 24 % efficiency in the SOLA Frame and Flex Daylight module series.
Shingled solar cells (PERC)
Parallel structure of overlapping cell strips in the SOLA Frame Black series to reduce hotspot effects.
Aluminium (hollow-chamber profile frame, anodized)
Stable, corrosion-resistant module frame with optimized 30-mm frame height.
Tempered/anti-reflective glass with lotus effect
Tempered, highly transmissive cover glass of the frame modules against weathering and soiling.
ETFE surface coating
Protects flexible modules from UV radiation, moisture and salt water – also suitable for maritime applications.
Cordura fabric
Robust protective fabric of the foldable SOLA Ease solar bag (IP53).
Locations
Lüneburg
DEHeadquarters, development, product design, sales office, warehouse
Products & Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Solar module custom manufacturing (OEM production, Customized Solutions)Engineering | – | – | – | – | Aluminium (frame), Glass (tempered/anti-reflective ESG glass), ETFE coating, Cordura fabric, Silicon solar cells (mono PERC, N-Type Back Contact) |
| Sizing & planning of autonomous solar systems (island systems, mobile applications)Engineering | – | – | – | – | – |
| System assembly & project support (component selection, bill of materials, quotation)Engineering | – | – | – | – | – |
Additional services
Reference customers
Quality
The SOLA Frame Mono and Black modules are manufactured according to an ISO 9001 certified process; the products carry certifications such as CE, RoHS, UN 38.3 (TARA Sync) and ECE R10.6 (vehicle use). Manufacturer warranties range from 5 years (NOVA Base²) and 7 years (NOVA Core²) to 10 years product and 25 years performance warranty for the frame module series.
| Evidence | Lüneburg |
|---|---|
| ISO 9001 (module manufacturing according to certified process) | |
| CE / RoHS / UN 38.3 (TARA Sync) | |
| ECE R10.6 (inverter) |
Company History
- 2014
Foundation; since 2014, WATTSTUNDE has stood for high-quality solar technology in the field of autonomous energy supply.
- 2026
Presentation of the NOVA 2 battery series and the SOLA Frame Shadow module series (among others at the Abenteuer & Allrad show in Bad Kissingen).