```html Battery Runtime Calculator | Sustainable Oasis Online
Sustainable Oasis ONLINE

SUSTAINABLE OASIS TOOLS

Battery Runtime Calculator

Estimate how long a battery bank can support a continuous electrical load after accounting for usable battery capacity and inverter losses.

This tool creates a planning estimate. Real runtime should later be compared with measured SO-EMS data.

INPUTS

Describe the battery and load.

kWh
Enter the nominal energy capacity of the battery bank.
watts
Example: lighting, refrigeration and electronics totaling 500 W.
factor
0.80 means 80% of nominal battery energy is treated as usable.
factor
0.90 represents an estimated 90% conversion efficiency.
Formula: Battery kWh × Usable Fraction × Inverter Efficiency ÷ Load = Estimated Runtime
BATTERY STORAGE Runtime Forecast
ESTIMATED
Usable Energy — kWh available
Runtime — hours
Autonomy — days
Battery Metric Value Unit Status
Nominal Battery Total stated capacity
— kWh
kWh storage
INPUT nominal
Usable Battery Energy After usable fraction and inverter loss
— kWh
kWh usable
EST. calculated
Estimated Runtime At the selected continuous load
— hours
— days
EST. planning

Data status: ESTIMATED

Compare with real battery discharge testing.

CONTROL ROOM

Send usable storage to the Control Room

The estimated usable battery energy can be sent to:

storage.energyStoredKWh

It remains classified as ESTIMATED until validated by measurement.

BATTERY INTELLIGENCE

Capacity is not the same as usable energy.

Battery autonomy depends on nominal capacity, allowable depth of discharge, conversion losses and the actual electrical load.

01

Capacity

Start with the nominal stored energy of the battery bank.

02

Usable Energy

Apply the selected usable fraction and expected inverter losses.

03

Load

Runtime depends directly on how much power the Oasis is consuming.

04

Measure

Compare the prediction with SO-EMS discharge and recovery measurements.

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