Planning, installation and maintenance of photovoltaic systems, battery storage, heat pumps and energy management systems
Sonnett Solar GmbH
Herdecke · DENew on Amplifa
About Sonnett Solar
Sonnett Solar GmbH is an owner-managed specialist company for renewable energy based in Herdecke. Since 1998, the company has been planning and realizing photovoltaic systems of every scale – from private rooftop installations and commercial systems on production halls and logistics centers to solar parks on conversion and agricultural land, including Agri-PV with bifacial modules and tracker systems. The service portfolio includes battery storage based on lithium-ion or LiFePO4 (AC-coupled, DC-coupled and hybrid), AC and DC charging stations from 11 to 300 kW, heat pumps (air-water, brine-water, water-water) as well as smart home and energy management systems based on KNX, Modbus, BACnet and Loxone. In addition to planning, installation and commissioning, the offering includes maintenance with thermography, I-V curve measurement and insulation testing, remote monitoring, and technical and commercial operational management; yield assessments and due-diligence reports are also available. To date, more than 2,000 projects have been implemented for private households, commercial customers, retail, agriculture and investors, primarily throughout Germany.
- Site
- Herdecke
- Processes
- Photovoltaic system planning and installation (residential systems), Commercial photovoltaic systems (rooftop systems), Ground-mounted photovoltaics / solar parks (incl. bifacial modules, tracker systems, Agri-PV), Charging station installation (AC wallboxes 11–22 kW, DC fast charging stations 50–300 kW), Heat pump installation (air-water, brine-water, water-water), Automation / energy management systems / smart home (KNX, Modbus, BACnet, Loxone), PV system maintenance (thermography, I-V curve measurement, insulation testing, DGUV V3), Heat pump maintenance (refrigerant check R290/R32, leak testing according to F-Gases Regulation)
- Materials
- Lithium iron phosphate (LiFePO4), Lithium-ion, Monocrystalline solar modules, Bifacial modules
- Certificates
- DGUV V3, F-Gases Regulation (leak testing), GEBEÄ/Heat pump system inspection
- Founded
- 1998
- Industries
- Private households, Commercial and industry, Logistics, Retail, Agriculture / Agri-PV, Investors
- 01
Consulting and potential analysis
- 02
Planning and profitability calculation
- 03
Project engineering, grid connection request and system registration
- 04
Installation and electrical installation
- 05
Commissioning and acceptance
- 06
Monitoring, remote surveillance and maintenance
- 07
Technical and commercial operational management
Technologies and Components
Lithium iron phosphate (LiFePO4)
Battery cell technology with high safety and long service life of up to 10,000 charging cycles.
Lithium-ion
Basis of home and commercial storage systems with high recyclability.
Monocrystalline solar modules
Modules with up to 500 Wp output, also available as full-black design for home systems.
Bifacial modules
For ground-mounted systems to utilize reflected light and achieve higher yields.
Locations
Herdecke
DEHeadquarters
- Thermography
- I-V curve measurement
- Insulation testing
- Monitoring systems with data loggers
- Energy management systems (KNX, Modbus, BACnet, Loxone)
Reference Projects
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Photovoltaic system planning and installation (residential systems)Installation | – | – | – | – | – |
| Commercial photovoltaic systems (rooftop systems)Installation | – | – | – | – | – |
| Ground-mounted photovoltaics / solar parks (incl. bifacial modules, tracker systems, Agri-PV)Installation | – | – | – | – | – |
| Installation | – | – | – | – | Lithium iron phosphate (LiFePO4), Lithium-ion |
| Charging station installation (AC wallboxes 11–22 kW, DC fast charging stations 50–300 kW)Installation | – | – | – | – | – |
| Heat pump installation (air-water, brine-water, water-water)Installation | – | – | – | – | – |
| Automation / energy management systems / smart home (KNX, Modbus, BACnet, Loxone)Installation | – | – | – | – | – |
| PV system maintenance (thermography, I-V curve measurement, insulation testing, DGUV V3)Testing | – | – | – | – | – |
| Heat pump maintenance (refrigerant check R290/R32, leak testing according to F-Gases Regulation)Testing | – | – | – | – | – |
| Monitoring, remote surveillance and technical/commercial operational managementTesting | – | – | – | – | – |
| Efficiency and due-diligence reports, yield assessmentsEngineering | – | – | – | – | – |
| Planning, project engineering, profitability analysis and system registrationEngineering | – | – | – | – | – |
| Solar thermal (offered since 2004)Installation | – | – | – | – | – |
Additional services
Quality
Quality assurance includes thermographic inspections with hotspot detection, I-V curve measurement, insulation testing and system inspections in accordance with DGUV V3. Regular on-site quality controls at the manufacturers' production facilities complement the testing program.
| Evidence | Herdecke |
|---|---|
| DGUV V3 | |
| F-Gases Regulation (leak testing) | |
| GEBEÄ/Heat pump system inspection |
Company History
- 1998
Foundation and first PV system
- 2000
Photovoltaics becomes a permanent part of the business
- 2004
Expansion to include solar thermal
- 2008
Energiequelle becomes Sonnett
- 2009
First solar park
- 2010
Large-scale project in Berlin
- 2011
Own PV mounting system
- 2014
Consistency in times of change
- 2016
Entry into battery storage
- 2023
The next generation
- 2025
Energy management, heat pump and smart home