Energy & solar calculators

4 free calculators · instant · nothing you enter is uploaded

Energy decisions pay back over years, so the arithmetic is about annual figures rather than monthly impressions. These calculators estimate how many solar panels a given electricity use needs and what they generate, price the running cost of an appliance from its rating and your tariff, size an air-conditioning unit from a room, and estimate the insulation a space needs. Results are planning estimates: an installer's own survey will refine them.