Configure the battery, not just the kWh.
Turn a load requirement into a first-pass battery configuration with usable capacity, a design reserve, pack quantity and an estimated series-parallel layout.
What battery configuration covers the load?
Start with the demand, runtime and usable window. The calculator then adds a planning reserve and rounds the answer into a practical series-parallel battery layout.
The voltage estimate is close to the requested DC bus. Confirm inverter, BMS, current and protection limits before final selection.
How the battery configuration is built
This calculator separates the load requirement from the physical configuration. First it works out the usable energy required by the load, then it applies the usable window, system losses and a planning reserve before assembling whole battery packs.
Use the result as a design brief
- Required usable energy
- The energy the load needs to receive during the requested runtime.
- Design nominal energy
- The nominal energy target after the usable battery window, losses and reserve are included.
- Series × parallel
- A first-pass configuration: series packs meet nominal voltage and parallel strings provide capacity.
- Indicative C-rate
- A quick power-to-energy signal. Confirm the actual pack current rating before final selection.
The result is a planning configuration, not an installation drawing. Final engineering must validate inverter DC voltage limits, BMS rules, current capability, temperature, protection and local electrical codes.
FAQ
What is the difference between this and a kWh estimate?
A kWh estimate answers the energy question. This tool goes one step further by applying a design reserve, rounding to complete packs and estimating an energy-level series-parallel configuration.
Why is the installed capacity higher than the minimum capacity?
A real system is assembled from whole battery packs and strings. The calculator rounds up for the requested design reserve and then rounds again to complete the required series-parallel layout.
Does the voltage result confirm inverter compatibility?
No. It is a first-pass nominal voltage estimate only. Confirm the inverter DC operating window, battery BMS limits, cable current, protection and site requirements before ordering equipment.
What design reserve should I use?
Use a small planning reserve when early-sizing a system. The final reserve should be set against battery aging, ambient temperature, duty cycle and the operating strategy for the site.
Share the configuration — we will check the assumptions
Hua Power can validate the voltage platform, reserve, battery current and product configuration before equipment is selected.