Solar PV
- Roof, garage and carport systems, flat and pitched roofs
- Single and three-phase inverters, backup and emergency power functions
- Off-grid systems without a grid connection
Solar PV with battery storage, heat pumps with KfW grant paperwork, EV charging – design, electrical work, grid registration and grant handling from one source.

A PV system, a heat pump and an EV charger are quickly sold individually. Together they only work if meter cabinet, load management, battery and controls are matched. As a registered electrical contractor we design the complete system – and build it ourselves instead of calling in a separate electrician.
For heat pumps we are listed as a specialist contractor with the German energy agency dena and handle the KfW grant (programme 458) with the confirmation before application and after completion. Grid operator registration, market master data register, commissioning notice: all included.
Many quotes for PV or heat pumps stop at the house connection. Whether the system is allowed on the grid is decided by the meter cabinet: space for additional meters, controllability under section 14a of the German Energy Act, protection, surge protection. We survey that before the quote, not after.
Electricity use, heating load, roof areas, meter cabinet – we record everything in one visit.
PV output, battery size, heat pump, EV charger as one matched system with a payback calculation.
Grid operator, KfW, market master data register – we file the applications before building starts.
Mounting, electrical work, commissioning, training, proofs for the grant.
A selection. Private customers are listed without names; contact persons for project references on request.
PV on garage and carport with battery, EV charger and video intercom as one package.
Air-to-water heat pump with KfW 458 grant handling, EV charger and three-phase inverter.
Solar surplus control for heating element and battery.
Off-grid PV system with hybrid inverter and lithium battery.
For typical households with 4–10 kWp a battery raises self-consumption from about 30 to 60–70 percent. Whether it pays off depends on the electricity price and consumption profile – we calculate it with your figures.
We issue the confirmation before application (BzA), you apply in the KfW portal, after installation we deliver the confirmation after completion (BnD). Important: apply before placing the order, or order with a condition precedent.
We do – as a registered contractor with the grid operator, plus the market master data register. You receive the confirmations in your system folder.
Yes, with surplus charging via an energy management system. We match wall box, inverter and battery for that.
Reply within one business day – with an honest assessment. English-speaking contact.