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.


AWG Sizing Calculator

AWG Reference (Resistance per 1000 ft)
AWG
Copper Ω/kft
Aluminum Ω/kft
Approx. Ampacity*
*Ampacity is a rough guide. Always check NEC or local code for AC branch circuits and manufacturer guidance for DC.

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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