Plain-English guides and videos on solar and batteries for homes, offices and small businesses.https://aprengineering.co.uk/https://aprengineering.co.uk/guides/buying-a-house-with-solar-panels/https://aprengineering.co.uk/guides/buying-a-house-with-solar-panels/Panels on the roof of a house you are buying are either an asset worth a few thousand pounds, a system that has quietly stopped working, or someone else's property under a lease. Five questions and a handful of documents tell you which.Mon, 12 Oct 2026 00:00:00 GMThttps://aprengineering.co.uk/guides/does-a-home-battery-make-sense/https://aprengineering.co.uk/guides/does-a-home-battery-make-sense/A battery can be the best part of a solar system or the most expensive mistake in it, and the quote will not tell you which. Four numbers from your own bills and the quote decide it, and you can work them out in an evening.Mon, 12 Oct 2026 00:00:00 GMThttps://aprengineering.co.uk/guides/solar-for-business-before-anyone-quotes/https://aprengineering.co.uk/guides/solar-for-business-before-anyone-quotes/On a business roof the quotes are bigger, the roof is often older, and the grid connection can decide the whole project. Settle these five things first and the installers quote against the same facts, which is the only way to compare them.Mon, 12 Oct 2026 00:00:00 GMThttps://aprengineering.co.uk/guides/two-meter-readings/https://aprengineering.co.uk/guides/two-meter-readings/Your monitoring app shows that the system is on. It does not show whether it is producing what it should. Two readings from the generation meter, a year apart, answer that question, and this is how to take them and what to compare them with.Mon, 12 Oct 2026 00:00:00 GMThttps://aprengineering.co.uk/guides/solar-on-a-new-build/https://aprengineering.co.uk/guides/solar-on-a-new-build/New homes increasingly come with solar, and the developer's contractor will offer you a menu. The options are priced for the developer's convenience, not your usage. Here is how to tell which one, if any, is right for the house you are buying.Mon, 12 Oct 2026 00:00:00 GMThttps://aprengineering.co.uk/guides/fit-owners-adding-a-battery/https://aprengineering.co.uk/guides/fit-owners-adding-a-battery/If your solar was installed between 2010 and 2019 you are probably being offered a battery. It can be a good idea. Here is what it does and does not do to your FiT payments, and the four questions to ask before you sign.Sat, 10 Oct 2026 00:00:00 GMThttps://aprengineering.co.uk/guides/free-solar-and-roof-leases/https://aprengineering.co.uk/guides/free-solar-and-roof-leases/Somebody wants to put panels on your roof at no cost to you. The panels are free; the roof is not. Here is what these agreements usually contain, what they decide for the next twenty-five years, and what to read before signing.Sat, 10 Oct 2026 00:00:00 GMThttps://aprengineering.co.uk/guides/why-a-solar-system-underperforms/https://aprengineering.co.uk/guides/why-a-solar-system-underperforms/Most systems lose a little output every year without anyone noticing. Here are the six usual causes, in the order they are worth checking, and a ten-minute test you can do from your own meter readings.Sat, 10 Oct 2026 00:00:00 GMThttps://aprengineering.co.uk/guides/how-to-read-a-solar-quote/https://aprengineering.co.uk/guides/how-to-read-a-solar-quote/Most solar quotes are three pages of kit and one page of promises. These five numbers tell you whether the system is right for you, and most quotes get at least one of them wrong.Fri, 09 Oct 2026 00:00:00 GMT