Calculator cluster
Inverters and charge controllers
MPPT vs PWM yield, inverter continuous and surge watts, idle drain and generator charging.
inverters
Generator Sizing for Battery Charging
Size a backup generator for a battery charger from DC charge current, battery voltage and charger efficiency.
inverters
Inverter Idle Draw Battery Drain
See how many watt-hours and amp-hours a switched-on inverter wastes overnight with no load.
inverters
Inverter Sizing Calculator
Size a pure sine inverter from continuous watts, motor surge and inverter efficiency with 25% headroom.
inverters
MPPT Charge Controller Sizer
Size an MPPT charge controller from array watts and battery voltage, with 20% current headroom and Voc margin.
inverters
PWM vs MPPT Efficiency & Yield Comparison
Compare daily watt-hours from a PWM charge controller versus MPPT when panel Vmp is above battery voltage.
Other clusters
- Battery storageSize house batteries, convert amp-hours to watt-hours, estimate C-rate limits, and plan LiFePO4 or trolling-motor banks.
- Solar panelsArray sizing, tilt and azimuth, series vs parallel wiring, temperature loss, cabin loads and roof space.
- Wiring and electrical safetyDC wire gauge, voltage drop, inline fuses, combiner-box fusing and grounding conductors.
- Appliance-specificRV air conditioning, Starlink, CPAP, well pumps, 12 V fridges, pellet stoves and e-bike charging.