Solar & Electrical Calculators
Solar & Electrical Calculators
Free NEC-based design tools for solar installers and electricians — sized right, first time.
Live
Voltage Drop Calculator
Check conductor voltage drop against the NEC 3% recommendation for DC and AC circuits, 14 AWG–4/0.
Open calculatorLive
Wire Sizing & Ampacity Calculator
Minimum conductor size per NEC 310.16 with ambient derating and the 125% continuous-load rule.
Open calculatorComing soon
PV String Sizing Calculator
Modules per string from Voc temperature correction, inverter MPPT window, and NEC 690.7 max system voltage.
In developmentComing soon
Battery Bank Sizing Calculator
Required Ah from daily load, days of autonomy, depth of discharge, and temperature derate.
In developmentComing soon
Solar ROI / Payback Calculator
Simple and discounted payback, 25-year net savings, and LCOE with ITC and degradation built in.
In development
Need equipment for the job?
Panels, inverters, racking, wire, and BOS — wholesale pricing for installers.
Request a quote
Panels, inverters, racking, wire, and BOS — wholesale pricing for installers.
Request a quote