Techknow Ireland

Another big name has joined the home battery race. Jackery, which also makes portable power stations, now has the SolarVault 3 range. It's well reviewed in Germany, but whether it's good value depends on where, and when, you look, and there's no Irish price yet. A home battery does a simple job. It stores electricity, from solar panels or from the grid on a cheap rate, and hands it back when you need it. Many of the newer ones are all-in-one boxes: battery, inverter (the bit