EV charger installation phase allocation calculator

Calculate total demand per phase and maximum phase demand with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use total demand per phase and maximum phase demand to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Measured phase base loads (kW)
2,3,1
Single-phase port assignments JSON [[phase1–3,power kW],...]
[[1,7],[2,7],[3,7],[1,3]]
Total demand per phase (kW)
[12,10,8]
Maximum phase demand (kW)
12
Max-minus-min phase imbalance (kW)
4

Try another scenario

Measured phase base loads (kW)
3.0,3.0,1.0
Single-phase port assignments JSON [[phase1–3,power kW],...]
[[1,7],[2,7],[3,7],[1,3]]
Total demand per phase (kW)
[13,10,8]
Maximum phase demand (kW)
13
Max-minus-min phase imbalance (kW)
5
Calculation method

Calculation method

Total demand per phase (kW)

Add each supplied single-phase charging-port demand to selected measured phase base load.

Maximum phase demand (kW)

Add each supplied single-phase charging-port demand to selected measured phase base load.

Max-minus-min phase imbalance (kW)

Add each supplied single-phase charging-port demand to selected measured phase base load.

Symbols and units
a
Measured phase base loads (kW)
b
Single-phase port assignments JSON [[phase1–3,power kW],...]

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Demand allocation only; no cable, breaker, neutral, earthing or installation certification. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. Demand allocation only; no cable, breaker, neutral, earthing or installation certification.
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