Examples
Examples
Try the starting example
- Measured available alternator output at scenario speed (A)
- 90
- System voltage (V)
- 14
- Concurrent electrical load powers (W)
- 280,140,210
- Additional battery charging current allocation (A)
- 10
- Concurrent load current (A)
- 45
- Current surplus or deficit (A)
- 35
- Net power surplus or deficit (W)
- 490
Try another scenario
- Measured available alternator output at scenario speed (A)
- 90
- System voltage (V)
- 14
- Concurrent electrical load powers (W)
- 280,280,420
- Additional battery charging current allocation (A)
- 10
- Concurrent load current (A)
- 70
- Current surplus or deficit (A)
- 10
- Net power surplus or deficit (W)
- 140
Calculation method
Calculation method
Concurrent load current (A)
sum(loadPowers)/voltage.
Current surplus or deficit (A)
availableOutput-loadCurrent-batteryChargeAllocation.
Net power surplus or deficit (W)
netCurrent*voltage.
Symbols and units
- a
- Measured available alternator output at scenario speed (A)
- b
- System voltage (V)
- c
- Concurrent electrical load powers (W)
- d
- Additional battery charging current allocation (A)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Calculation steps and notation
sum(list) adds all entries in the list.
Assumptions & limits
Assumptions & limits
- Steady DC power arithmetic at one supplied voltage and measured alternator condition. Negative is deficit; no wiring, fuse, thermal or battery charging recommendation. Supported limits: Output and allocation>=0; voltage>0; 1..100 nonnegative load powers.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.