Battery Calculator

Yearly Energy Consumption (kWh)

Don't know your usage?

Calculate it here

What is your primary goal?

Backup Power (for Outages) Daily Cost-Saving

Calculates for a worst-case scenario using **100%** of your daily energy use.

Calculates the size needed to cover only your nightly energy use on consecutive cloudy days. Assumes some solar during the day. This option is also ideal for charging your battery with cheap, off-peak grid electricity to use during more expensive peak hours.

Days of Backup

How many consecutive days with **no sun** do you want to be prepared for?

How many consecutive **cloudy days** should your nightly energy use be covered for?

Typical Nightly Energy Use (%)

The percentage of your daily electricity consumption that happens after sunset.

Battery Depth of Discharge (%)

The maximum usable capacity (Depth of Discharge). Modern LFP batteries offer 90-98%, much higher than lead-acid batteries (~50%).

Recommended Battery Size

kWh

Based on an average daily use of 0 kWh.