Battery Sizing Guides

Getting the right battery size is the most critical decision in any solar energy system. Too small and you run out of power during outages; too large and you waste thousands of dollars on capacity you'll never use. This section walks through the engineering methodology behind battery sizing — daily load calculations, autonomy requirements, depth of discharge buffers, and seasonal adjustments for winter efficiency loss. Use these guides alongside our calculator to validate your inputs and understand the assumptions behind your results.