INTERACTIVE / STORAGE PLANNER
Start with the load.
Explore the storage.
Build an illustrative energy scenario with transparent assumptions. All calculations happen in your browser; your inputs are not submitted.
This is energy arithmetic, not a system design or a quote. It excludes auxiliary loads, degradation, temperature effects, redundancy, charging power limits and grid studies. Required inverter power is not sized by the nominal energy calculation.
The formulas
- Delivered AC energy (MWh) = average load (MW) × duration (hours).
- Nominal DC capacity (MWh) = delivered AC energy ÷ usable capacity fraction ÷ discharge path efficiency.
- AC charging energy per cycle (MWh) = delivered AC energy ÷ round-trip efficiency.
- Annual delivered AC energy (MWh) = delivered AC energy per cycle × annual cycles.
The round-trip assumption includes charging and discharge losses. Do not divide charging energy by discharge efficiency a second time. All default inputs are illustrative, not supplier specifications.