Battery Bank Size Planner

Undersized battery banks mean dead power at night. Oversized banks waste money and space. This calculator tells you exactly how many batteries you need for your off-grid or solar setup. Enter daily load in watt-hours, system voltage (12V, 24V, 48V), depth of discharge percentage, autonomy days, and individual battery specs. Calculates required amp-hours, batteries in series and parallel, total battery count, and total bank capacity. WHAT IT CALCULATES: - Required total amp-hours - Batteries in series (voltage matching) - Batteries in parallel (capacity matching) - Total battery count - Total bank capacity vs required KEY FEATURES: - Supports any battery chemistry (lithium, AGM, flooded lead-acid) - Depth of discharge adjustment - Autonomy day planning - Works completely offline - No account or login required Perfect for solar installers, RV owners, cabin builders, and marine electricians.