Guides
Decision guides on balcony solar and battery storage in Germany – each with its assumptions stated openly, and each ending in a calculation rather than a generality.
Balcony solar in Germany
What a Balkonkraftwerk is, how it saves money, when a battery is worth considering, and the four things that decide the answer for your household.
United Kingdom
A separate territory, not a translation. These pages are about British rules and British products; the calculators on this site are German and say so.
Plug-in solar in the UK
What changed on 27 August 2026, which rules apply where, and the primary sources for each — with the date they were read.
The GB plug-in solar register
Every device on the ENA Type Test Register, the status the register records for it, and why Northern Ireland is a separate question.
What a UKSOL kit costs
Prices read off the manufacturer's store and its official reseller, why the same kit appears twice, and why we will not quote you a saving yet.
Status: this section is being built up. Only what can be substantiated gets published here.
Other sections
- Calculators
- Comparisons
- Methodology – how stromFit calculates