Tick what needs to run, tell us your backup hours, and the readout gives you inverter size, battery capacity and panel count — using the same sizing logic we apply on real installations. Works for homes, businesses and industrial sites.
How long the batteries must carry your average load on their own — a typical evening load-shedding block is 4–8 hours.
Harare averages about 5.5 peak sun hours a day. Lower it for misty highveld or shaded sites, raise it for Lowveld sun.
These figures are an engineered estimate, not a quote. Real sizing also weighs your roof orientation, cable runs, ZESA supply and how your loads overlap through the day — that's what our free site assessment (homes) or paid feasibility study (commercial) pins down. Motor loads marked M draw about three times their rated power for a moment at startup; the calculator sizes the inverter to survive the largest one starting while everything else runs.