Battery recharge stage time calculator

Choose one energy basis for the SOC scale

Capacity here means the energy represented by the full 0–100% SOC range used in the scenario. If a displayed SOC scale already excludes inaccessible reserves, do not reduce that capacity a second time without matching the definitions.

The stored increment is capacity times the difference in SOC fractions. It is not automatically charger input energy because conversion losses and concurrent loads require additional input.

The vfd pump speed energy calculator adds compare entered pump speed schedules using affinity-law flow, head and hydraulic power, with explicit efficiency changes and a same-hours reference.

Apply efficiency before subtracting battery-side load

Charger input power multiplied by efficiency is usable output at the battery side. The active load is then subtracted from that output, leaving net power that increases stored energy.

A traversed stage with zero or negative net power cannot reach the next SOC boundary in this model. The tool rejects it rather than producing a negative or infinite recharge time.

A taper is represented by explicit segments

Each row ends at a higher SOC and supplies a constant input-power assumption for that interval. A slower final row can illustrate taper without pretending to derive a battery-specific charge curve.

The energy table and SOC graph retain those segment boundaries. Check that input energy equals stored energy plus modeled load energy plus conversion loss; real equipment behavior can depart from every entered segment.

Use the result with the next measurement

The appliance stepped tariff bill calculator prices modeled electrical input energy. Use charger input kWh rather than only stored kWh when estimating the electricity purchased for a recharge.

Piecewise constant-power scenario, not a real charging curve or safe controller setting. Capacity, efficiency, taper segments and load are entered. No BMS, temperature, aging or balancing model.