Storage & solarFlagship
Solar & Battery Quote Checker
Received an installer quote? Independently model expected solar generation, compare claimed savings and payback, compare a second quote and test alternative battery sizes.
Open toolDecision library
Home energy decision tools
Start with the expensive decision you are trying to make. Each tool exposes its assumptions so you can review claims, test alternative assumptions and run a conservative case.
Storage & solarNew
Plug-in Solar Payback Calculator
Model a balcony, wall or garden plug-in solar kit using postcode-specific PVGIS generation, inverter clipping and the electricity your home can use at the same time.
Open toolStorage & solar
Home Battery Payback Calculator
Use your installed price, usable capacity and real tariff spread to estimate whether a home battery can recover its cost through energy shifting.
Open toolHeating
Heat Pump vs Gas Break-Even
Compare the cost of useful heat from a heat pump and a gas boiler using your own energy prices, seasonal COP and boiler efficiency.
Open toolStorage & solar
Solar + Battery vs Solar Only
Estimate the extra financial value of adding battery storage to a solar system instead of assuming every stored solar kWh is worth the full import price.
Open toolTariffs & EV
EV Tariff Whole-Home Calculator
Compare an EV tariff with your current electricity plan while including the rest of the home, not just the attractive overnight charging rate.
Open toolAppliances
Heat-Pump Dryer Payback
Estimate whether the lower electricity use of a heat-pump tumble dryer is enough to recover a higher purchase price for your household.
Open toolAppliances
Air Fryer vs Oven Cost
Compare the cost of a complete cooking job using appliance power, preheat time and cooking duration rather than wattage alone.
Open toolStorage & solar
Solar Self-Consumption Value
Measure the financial value of using more solar electricity in the home once the export payment you give up is properly accounted for.
Open toolStorage & solar
Battery Size Optimiser
Compare a smaller and larger home battery by focusing on the value of the extra capacity, not simply assuming bigger is better.
Open toolTariffs & EV
Cheap-Rate Appliance Scheduler
Estimate what you can actually save by shifting flexible appliance use into cheaper electricity periods.
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Use your real figures
Enter current tariff rates, product quotes and household usage rather than relying on generic national averages.
Test the assumptions
Generation, self-consumption, export value and equipment sizing can materially change payback. We show the inputs behind the result.
Compare the decision
Use a conservative case as well as a central estimate. The cheapest headline quote is not always the best-value configuration.
Planning tools, not a sales funnel
HomeEnergyCalcs.co.uk is designed around the financial question behind an upgrade. We do not sell solar systems, batteries, tariffs or appliances and we do not require an account.
Transparent inputsYou can see and change the figures driving each result.
Independent dataThe solar quote checker uses European Commission PVGIS generation modelling through our Cloudflare API.
Privacy-consciousQuote prices, installer names and claimed savings remain in your browser during the MVP quote check.
Worked examples
See the assumptions before you calculate
Explore low/base/high scenarios for batteries, solar self-consumption, heat pumps, EV tariffs and appliance energy costs. Every page links back to the editable calculator.
More decision references