UK Energy Bill Calculator for EV, Solar and Battery Planning

Use this calculator to estimate your real household energy costs in the UK before changing tariff or buying new technology. Enter your standing charges, unit rates, and annual usage to see a realistic monthly and annual bill. You can then test off-peak rates, gas assumptions, and different consumption patterns to understand where your spend actually goes.

Unlike basic quote tools, this model lets you layer in electric vehicle charging, solar generation, and home battery behavior on top of your tariff setup. That makes it easier to compare options such as staying on a single-rate tariff, moving to Economy 7 style off-peak pricing, or changing how much demand you shift overnight. Use scenarios to compare outcomes side by side.

Start with your current bill data, then adjust one variable at a time to identify the strongest savings levers for your home. If you are planning a retrofit, supplier switch, or EV purchase, this page gives you a practical cost baseline you can revisit whenever prices or usage change.