Interactive home battery storage modeling tool for residential prosumers. Simulates critical essential load backup hours during grid outages, models 24-hour solar + storage dispatch curves, calculates solar self-consumption maximization (from ~35% to >85%), and evaluates avoided expensive diesel generator running costs.
Governing Formulas & Standards
Standards Basis: IEC 62619 / UL 1973 / IS 16046 (LFP Battery Safety)
\text{Autonomy Hours} = \frac{E_{usable} (\text{kWh})}{P_{essential} (\text{kW})}
Calculates continuous backup hours where usable energy is rated capacity multiplied by Depth of Discharge (90% for LFP).
Worked Engineering Example: 10 kWh LFP Home Battery Backup for 850W Essential Load
- Continuous Outage Autonomy: Hours = 9.0 kWh / 0.85 kW → 10.6 Continuous Hours
- Solar Self-Consumption Enhancement: Increases from 38% (solar only) to 88% with 10 kWh battery → +50% Solar Stored & Self-Used
Final Solution: Blackout Autonomy: 10.6 Hours on Essential Load | Self-Consumption: 88% | 10-Yr Wealth: +₹2.1 Lakhs
Frequently Asked Questions
- Can a home battery run air conditioners during a power outage?
- Yes, modern 5–10 kW hybrid inverters can start and run 1.0–1.5 ton inverter ACs, though running heavy AC loads drains battery capacity significantly faster (e.g. 1.5 kW draw gives ~5–6 hours from a 10 kWh battery).
Interactive calculation engine and real-time CAD solver available online at https://amithvijayan.in/tools/residential-battery-backup.