Solar Autonomy Calculator

How Solar Autonomy works

The calculation starts with days = usable energy ÷ daily load. Solar Autonomy uses Usable battery energy, Daily load to report Autonomy duration.

With the loaded values, autonomy duration evaluates to 3.00 days. Change only the quantity being investigated. Use Solar Irradiance Power Calculator as the follow-up for array power.

Inputs for Solar Autonomy

Usable battery energy and Daily load belong to Solar Autonomy. Keep source units with usable battery energy.

Treat the preset entries as an arithmetic example. Supply measurements or ratings from the actual circuit. For energy after shading, use Solar Shading Loss Calculator.

Usable battery energy

Example entry: 18 kWh.

Daily load

Example entry: 6 kWh.

Reading the Solar Autonomy result

This output represents Solar Autonomy.

Finish the selection with standard sizes, operating limits, and transient review.

Measurement and units

Use site-specific irradiance, temperature, shading, equipment limits, and measured system losses. Check prefixes on usable battery energy. Available voltage margin belongs in the separate MPPT Voltage Window worksheet.

Scenario differences are meaningful only with consistent units and observation points.

Limits of this calculation

Solar input during the outage is excluded. If the next question concerns seasonal tilt estimate, open Solar Panel Tilt Calculator.

The arithmetic is intentionally narrower than a complete circuit model. Unentered effects remain outside Solar Autonomy.

Questions about Solar Autonomy