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Off-Grid System Sizing

Calculate Off-Grid System Sizing instantly with the exact formula and a worked example.

Off-Grid System Sizing

Daily consumptionkWh
Days of autonomydays
Allowed depth of discharge%
Inverter efficiency%
System voltageV
Single battery voltageV
Single battery capacityAh
Battery bank capacity
13.8889kWh
Lead-acid — 50% DoD, LiFePO4 — 80–90%Calculate Off-Grid System Sizing instantly with the exact formula and a worked example.
Capacity at system voltage
289.4Ah
Series × parallel
4 × 2
Total batteries
8pcs

More about: Off-Grid System Sizing

What it calculates

The “Off-Grid System Sizing” calculator computes Battery bank capacity in kWh from 7 parameters: daily consumption (kWh), days of autonomy (days), allowed depth of discharge (%), inverter efficiency (%), system voltage (V), single battery voltage (V), single battery capacity (Ah).

Estimates environmental impact and carbon footprint.

Example calculation

With parameters Daily consumption = 10 kWh, Days of autonomy = 1 days, Allowed depth of discharge = 80 %, Inverter efficiency = 90 %, System voltage = 48 V, Single battery voltage = 12 V, Single battery capacity = 200 Ah the result is 13.89 kWh (Lead-acid — 50% DoD, LiFePO4 — 80–90%).

How to use

  1. Enter daily consumption, days of autonomy, allowed depth of discharge, inverter efficiency, system voltage, single battery voltage and single battery capacity — each field above is adjustable with a slider.
  2. Battery bank capacity (kWh) is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is Off-Grid System Sizing calculated?
The Off-Grid System Sizing calculator computes Battery bank capacity (in kWh) from daily consumption, days of autonomy, allowed depth of discharge, inverter efficiency, system voltage, single battery voltage, single battery capacity. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Off-Grid System Sizing calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.

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