Frequently asked questions

A roof facing south, east or west with little shade is almost always suitable. A flat roof works too. During the roof scan we also look at the state of your tiles and the roof structure.

Yes, although earning it back takes longer: in our worked example about eight years. The more power you use yourself during the day, the faster it goes. That's why we calculate with your usage, not an average.

Nothing. We visit, measure everything and email a layout with a calculation within five working days. Whether you go ahead after that is up to you.

For an ordinary house one day, with two or three fitters. By evening the inverter is running.

Usually not. A roof ladder, anchor points and fall protection are enough. For a high or steep roof we put up a mobile tower, and that's already in the quote.

Briefly in the morning, for the fuse box, and around four, when we explain the app. In between you're free to go out.

After a year we compare your yield with the calculation. If you're more than ten per cent below, we find out why. Free of charge.

25-year product and performance warranty on the panels, 10 to 12 years on the inverter, 10 years on a home battery and 10 years on our own fitting work.

With a pitch above 20 degrees, rain washes most of it away. On flat roofs, under trees or with lots of birds, cleaning every one or two years pays off.

Then the salderen (net metering) scheme ends. You can no longer offset the power you feed back against the power you use. You get a feed-in payment, and that's lower than the electricity price.

Not always. A battery mainly pays off with high evening use, with a heat pump or if you drive electric. We do the sums with your own usage.

Yes. With a hybrid inverter a battery can be added later, and often there's room for more panels if your usage goes up.