Solar PV system
Visual inspection of modules, inverter and cabling, plausibility of yields and visible damage.
SOLAR PV & ENERGY CHECK FOR HOMEOWNERS
How ready is your house for the future?
“First understand, then decide.” – Your house 🏡
Solar panels, heat pump, energy performance certificate, heating, roof: homeowners currently face many questions and many new rules. For the solar PV & energy check, I personally inspect your house in Düsseldorf as a graduate engineer and certified expert for solar PV systems, and tell you clearly where it stands and what makes sense next.
What I check
Feed-in & contracts
Feed-in tariff and when it ends, grid operator, entry in the Market Master Data Register (Marktstammdatenregister), storage and maintenance contract.
Energy performance certificate (EPC)
Is a certificate available and still valid? What energy efficiency class does the house have, and is it a demand-based or consumption-based EPC?
Heating & heat pump
Age and type of heating, what the new Building Modernisation Act (Gebäudemodernisierungsgesetz) means for your house and whether a heat pump is suitable: flow temperature, radiators, space for the outdoor unit and how it works together with your solar PV system.
Roof & solar obligation
Is a major roof renovation due? Then, since 1 January 2026, NRW generally requires solar PV when the roof covering is completely renewed (exceptions are possible). I check what is feasible on your roof.
Value & sale
Which of these affects the market value, and which measure pays off first? This is where I combine technical knowledge with market expertise.
PART OF THE CHECK
Is a heat pump right for your house?
What I look at
- Flow temperature: How warm does the heating water need to be on cold days? The lower it is, the more efficient the heat pump.
- Radiators and insulation: Are the existing radiators sufficient, or do some need to be larger? Underfloor heating is not strictly necessary.
- The right type: air-to-water, ground source or groundwater, depending on the plot, space and budget.
- Solar PV and heat pump together: how much electricity from your own roof the heat pump can use.
- Value and sale: what a conversion means for the market value and for buyers.
Funding: owner-occupiers can currently receive grants of up to 70% via the KfW, or up to 80% on a low income; cuts have been announced from February 2027. You can find a detailed comparison of all types including costs under Heat pumps comparedCalculators.
How the check works
- Short conversation: by phone or online appointment. We clarify what matters to you.
- On-site visit: I inspect the house, system and documents on site.
- Traffic-light result: a short written overview of what is in order, what is due soon and what is urgent.
- Follow-up conversation: your questions and, if you wish, an assessment of the market value.
Who is this for?
- You have a solar PV system and want to know whether everything is in order.
- The feed-in tariff for your system is about to expire.
- Your roof or heating will soon need replacing.
- You are considering selling, letting or handing the property over to your children.
- You have inherited a property and want to know what lies ahead.
These documents help at the appointment
- Commissioning report and data sheets for the solar PV system, statements from the grid operator
- Registration confirmation from the Market Master Data Register (Marktstammdatenregister)
- Energy performance certificate, if available
- Chimney sweep’s report and heating maintenance records
- Invoices for modernisation work (roof, windows, insulation, heating)
Something missing? No problem. I note anything that is not available in the result, and we work out together how you can obtain it. You can find all documents for a later sale in the House sale checklist (PDF).
Frequently asked questions
Is the check an energy consultation?
No. The solar PV & energy check is an expert inventory of the current condition. For a subsidised energy consultation, such as an individual renovation roadmap, accredited energy efficiency experts are responsible. If you wish, I can point you in the right direction.
Do I have to sell afterwards?
No. Many owners simply want to know where their house stands. If you consider selling later, the check already gives you a good basis.
What does the check cost?
That depends on the property and scope, for example whether there is a solar PV system. You will receive the price in advance, before I visit you.
How long does the on-site visit take?
For a one- or two-family house, usually one to two hours, depending on the system and documents.
Do you also check the system’s electrics?
I assess the system as a certified expert and identify irregularities. An electrical inspection and measurement according to VDE is carried out by a qualified electrical contractor. If this is necessary, I will tell you.
The solar PV & energy check is an expert inventory of the current condition. It does not replace a subsidised energy consultation, an electrical inspection according to VDE, or legal or tax advice. Legal requirements change; the situation on the day of the appointment applies.