The calculators on this site size equipment — but sizing comes second. These pages answer the question that comes first: which option should you buy at all? Each comparison states where each option wins, sources and dates its claims, works its numbers from the same models the calculators use, and ends at the calculator that runs your own figures.
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Home backup power
Powerwall vs standby generator for home backup: runtime, installed cost, fuel, noise, and daily solar value compared with worked numbers from our sizing calculators. As of Oct 2026.
Read the comparisonSolar battery chemistry
LiFePO4 vs lead-acid for solar storage: usable capacity, cycle life, efficiency, weight, cold weather, and lifetime cost compared, with a worked sizing example. As of Oct 2026.
Read the comparisonInverter buying
Pure sine vs modified sine inverters: harmonic distortion, which loads care and which don't, motor and medical-device safety, and price — with the sizing math from our calculators. As of Oct 2026.
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