Guides
Choose, use, understand.
How storage works, which one to choose, and what the rules say about where it may be connected.
Deep dive
Using
How many hours will the fridge last, and the other sums you do by hand
A fridge doesn't draw the watts on its nameplate, and multiplying watts by hours is the mistake that's out by a factor …
Deep dive
Understanding
How much does every kWh passing through the battery cost
Price divided by capacity tells you what it costs to buy, not what it costs to use. The sum that brings together price,…
Deep dive
Understanding
How long does a battery storage system really last, and what runs out first
Six thousand cycles on the box and two years on the warranty certificate are two promises that never meet. Which number…