EquiVolt Savings Calculator

EquiVolt Savings Calculator

See how much you could save with home battery storage

Household usage

Based on Ofgem typical UK household figures

EquiVolt system

EquiVolt+ actively manages charging cycles to maximise savings and battery longevity.

p / kWh

Your flat-rate or peak-rate unit price

p / kWh

Typically 6–12p/kWh on a time-of-use tariff

Off-peak window

Length of the off-peak tariff window.

Estimated annual saving
£—
Including EquiVolt+ subscription cost
Estimated saving over 10 years —
Monthly saving (average) —
Daily energy shifted (average) —
Estimated payback period —
System cost (inc. installation) £2,999
Your daily usage is low relative to the 30 kWh battery — the system won't complete a full charge cycle on most days. You may get better value from the 15 kWh system. Get in touch to discuss the right configuration for your household.
Based on your current usage, the estimated payback period is over 10 years. A higher daily usage — or switching to a lower off-peak tariff — would improve this significantly. Get in touch to talk through your options.
Monthly electricity cost — with vs. without EquiVolt
Cumulative savings vs system cost

Estimates are illustrative. The baseline (without battery) assumes all usage at your current flat or peak rate unless you select that you already have a time-of-use tariff. The with-battery figure assumes usage during the off-peak window is billed at the off-peak rate, with 90% of peak-window usage shifted to battery overnight charging (85% round-trip efficiency). Monthly figures apply seasonal demand factors for your heating type; months where peak-window usage exceeds battery capacity carry the excess at the peak rate. Annual saving is the sum of monthly savings less any subscription cost. The 10-year estimate assumes constant tariff rates.

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