Calculators
Below are handy calculators. The AWG Sizing Calculator helps you select correct cabling. The Off-Grid Load & System Sizer calculator sums up your total Wh/day, estimating common loads, and you can refine duty and average hours of use. The Voltage Drop Calculator compares different Cable/wire sizes (AWG) to their voltage drops over a specfic Distance. The Solar Sizing Estimator uses ProjectSunroof data to estimate either residental or mobile solar fesibility, size and cost. Use these tools at your own risk.
*Ampacity is a rough guide. Always check NEC or local code for AC branch circuits and manufacturer guidance for DC.
AWG Sizing Calculator
AWG Reference (Resistance per 1000 ft)
AWG
Copper Ω/kft
Aluminum Ω/kft
Approx. Ampacity*
Off-Grid Load & System Sizer
Appliance | Watts | Hrs | Qty | Duty% | Wh/day | |
---|---|---|---|---|---|---|
Total | 0 |
Voltage Drop Calculator
K constant (Estimated method): 12.9 cmil-Ω/ft @ 75 °C.
Results
Voltage drop
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Drop percent
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Load end voltage
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Calculated current
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Solar Sizing Estimator
Results
Recommended size (DC)
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Est. annual production
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Panels (approx)
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Roof area needed
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Inverter (AC, cont.)
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Annual bill savings
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Net cost (after incentives)
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Simple payback
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Offset (%)
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