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Have a question about an electrical sizing formula, spotted an edge case in our calculations, or want to suggest an off-grid feature? Reach out directly.
Emails go directly to Gourav, the developer and creator of SolarBatterySizing.com. You will receive a direct, personal response.
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Found a mathematical discrepancy or browser layout glitch? Let us know.
Standards & Formula Suggestion
Suggestions for NEC 2026, CEC, or IEC 60364-5-52 conductor formulas.
General Inquiry & Feedback
Feature requests, tool ideas, or general feedback on your off-grid system sizing.
Important Scope & Privacy Notes
• Independent Tool Suite: SolarBatterySizing.com is an independent educational engineering resource. We do not sell batteries, solar panels, inverters, or hardware, nor do we operate an electrical installation contractor business.
• Privacy: Your email address and correspondence will only be used to respond to your specific inquiry. We do not maintain marketing lists, newsletter blasts, or share contact details with third-party vendors.
• Safety Verification: While we strive for absolute mathematical precision based on NEC/IEC standards, calculations are for preliminary sizing and planning. Always verify final installations with a licensed electrical contractor before energizing physical equipment.
Explore Our Free Electrical Engineering Tools
Ensure your entire off-grid power architecture is safe and properly balanced using our companion engineering calculators.
Master Solar & Battery Sizer→
Complete off-grid system sizing: appliances to battery bank, inverter, and solar array.
Battery Run Time Calculator→
Calculate operating hours and days for 12V, 24V, or 48V batteries under continuous loads.
Solar Charge Time Calculator→
Determine peak sun hours and days required to charge batteries with solar panels.
Solar Panel Sizer & Output→
Calculate total solar array kW, panel count, and roof area needed for daily energy needs.
Solar Wire Gauge & Fuse Sizer→
NEC 3% voltage drop AWG and IEC mm² cable sizing with fuse rating recommendations.
Watts to Amps Calculator→
Instant 2-way DC & AC single-phase converter with wire gauge and fuse recommendations.
Ah to kWh Battery Converter→
Convert Amp-Hours to kWh and Wh across 12V, 24V, and 48V battery systems with DoD.