Verify phase and surge.
Confirm single or three phase, voltage, frequency, motor starting current, surge duration and temperature derating.
Interactive planning tool
Estimate inverter, battery and solar-panel size.
Turn a real load profile, backup target and local solar resource into a transparent first-pass system estimate. Every formula and assumption remains visible for review.
Last reviewed: 21 August 2026 · Planning calculations, not a final engineering design
01 / PROJECT INPUTS
Enter a planning load profile.
Use measured load and local solar data whenever possible. Defaults reproduce the worked example in the SAVYEN sizing guide.
Calculation method
Power, energy and solar yield answer different questions.
The calculator deliberately keeps the three sizing steps separate. This prevents daily energy, inverter power and battery runtime from being treated as the same rating.
- Inverter planning power
- max(simultaneous load × 1.25, starting event)
- Nominal battery energy
- backup kW × hours ÷ usable fraction ÷ efficiency
- PV-array baseline
- daily kWh ÷ peak sun hours ÷ system yield
- Panel quantity
- ceil(PV watts ÷ selected module watts)
Before ordering
Use the result to start engineering—not finish it.
Verify current and communication.
Confirm battery voltage, BMS discharge current, CAN/RS485 protocol, firmware, settings, reserve and parallel rules.
Verify every PV string.
Confirm cold-condition voltage, MPPT range, input current, module temperature, shading, orientation and poor-season production.
NEED A CONFIRMED DESIGN?
Send the calculation with your real load list.
We will verify compatible inverter, battery, PV and protection options for the destination country.
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