Calculator cluster
Wiring and electrical safety
DC wire gauge, voltage drop, inline fuses, combiner-box fusing and grounding conductors.
wiring
DC Inline Fuse & Circuit Breaker Sizer
Size a DC fuse or breaker at 125% of continuous current, then check it against copper cable ampacity.
wiring
DC Voltage Drop Calculator
Calculate copper DC voltage drop in volts and percent for a chosen AWG, current and one-way cable length.
wiring
12V/24V/48V DC Wire Gauge (AWG) Calculator
Pick a copper AWG size for 12V, 24V or 48V DC runs from current, one-way length and a 3% voltage-drop budget.
wiring
Grounding Rod & Wire Sizer
Estimate copper GEC size for a ground rod or other electrode and EGC size from the DC overcurrent device.
wiring
Solar Combiner Box Fuse Sizer
Size PV string and combiner fuses at 1.56 × Isc and see when three or more parallel strings need fusing.
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.
- Inverters and charge controllersMPPT vs PWM yield, inverter continuous and surge watts, idle drain and generator charging.
- Appliance-specificRV air conditioning, Starlink, CPAP, well pumps, 12 V fridges, pellet stoves and e-bike charging.