Coming Soon
Battery Bank Wire Calculator
Calculate series and parallel configurations for voltage and amp-hour scaling.
PlannedTools
Battery calculators built for quick decisions
Accurately calculate battery sizing, appliance runtimes, and off-grid power requirements. Choose a dedicated utility below to plan your system.
Battery Run Time Calculator
Estimate how long a battery can support a load in watts or amps with conservative reserve factors for lead-acid and lithium setups.
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Inverter & Efficiency Loss Calculator
Estimate real-world AC wattage draws accounting for continuous loads and DC inverter overhead.
PlannedTechnical Standards
Off-grid power and capacity calculation methods
01 / Depth of Discharge (DoD) Reserves
Standard estimates rely on ideal laboratory conditions. Real-world calculations must factor in strict chemistry discharge limits to ensure field reliability:
- Lithium (LiFePO4): Safely utilizes up to 92% of its total capacity, requiring only a minimal 8% safety reserve.
- Lead-Acid (AGM/Gel): Restricted to a 50% depth of discharge to protect internal plates and preserve battery life.
02 / Real-World Inverter & Efficiency Loss
Power conversion isn't perfect. To get an accurate field estimate, calculations must account for standard system overhead:
- Inverter Loss: Converting DC to AC power converts roughly 10% to 15% of your energy into heat.
- System Scaling: Formulas convert between capacity and load using basic Ohm's Law (A = W / V), assuming standard operating temperatures.
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