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Solar Inverter Ratio and Load Calculator

Compare PV DC/AC nameplate ratio, simultaneous AC watts and VA, timed peak ratings and the actual battery-voltage and current envelope.

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Inputs that matter
PV array nameplate DC power (kW), Chosen DC-to-AC nameplate ratio, Candidate inverter AC nameplate power (kW), Sources and assumptions, and 18 more
Output to expect
PV nameplate DC/AC ratio, Inverter load and battery envelope
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details

How it works

PV nameplate DC/AC ratio

Translate a chosen nameplate DC/AC ratio into AC inverter capacity and compare an actual candidate. This ratio alone cannot predict clipping or annual generation.

Required AC nameplate kW = PV nameplate DC kW / chosen DC-to-AC ratio; candidate DC/AC ratio = PV DC kW / candidate AC kW.

Inverter load and battery envelope

Compare total simultaneous AC demand in watts and volt-amperes against documented continuous and timed peak ratings. Check the actual battery-voltage envelope and corresponding DC supply demand independently.

Required DC current = (total AC real watts / conversion efficiency + additional idle watts) / minimum loaded battery voltage. W, VA and duration constraints are checked separately.

Updated: September 2026

Example Scenarios

Try this example to see the calculation, then enter actual documented values and preserve the measurement conditions. A failed or unresolved comparison is part of the record.

→ 5 kW AC at the chosen ratio

Try this example to see the calculation, then enter actual documented values and preserve the measurement conditions. A failed or unresolved comparison is part of the record.

→ Numerical constraints met; compatibility unconfirmed

FAQ

Translate a chosen nameplate DC/AC ratio into AC inverter capacity and compare an actual candidate. This ratio alone cannot predict clipping or annual generation. Compare total simultaneous AC demand in watts and volt-amperes against documented continuous and timed peak ratings. Check the actual battery-voltage envelope and corresponding DC supply demand independently.

Use the exact equipment data, measurement point, operating conditions and units described in the selected mode. Record source documents, dates and unresolved conditions in Sources and assumptions. Built-in examples illustrate arithmetic; they are not manufacturer ratings or approved designs.

Use Save planning case for an explicit local history entry. Copy MD keeps current inputs and notes; Download CSV exports the result breakdown. Export portable copies before clearing storage and save a separate case after changing equipment, conditions or measurements.

About Solar Inverter Ratio and Load Calculator

Translate a chosen nameplate DC/AC ratio into AC inverter capacity and compare an actual candidate. This ratio alone cannot predict clipping or annual generation. Compare total simultaneous AC demand in watts and volt-amperes against documented continuous and timed peak ratings. Check the actual battery-voltage envelope and corresponding DC supply demand independently.