Energy Utilisation
Push Your Installer for a Bigger Battery and More Panels
- Installers size for annual average. Typical UK household sits at 7.4 kWh/day, pointing the formula at an 8 to 10 kWh battery.
- Winter usage is +27% higher and solar drops to 29.6% of summer yield. Average sizing leaves a gap.
- Extra capacity at install earns £59 to 72/year per kWh on a time-of-use tariff, with 4 to 6 year marginal payback.
- Retrofit costs 30 to 50% more than the same kWh added at install.
