Solar Battery Sizer NEC 706

Battery Bank Sizing for Off-Grid & Hybrid Solar Systems (NEC 706)

# What it does
Calculates required battery capacity (kWh and Ah), number of batteries, usable energy, and estimated cost for off-grid and hybrid PV systems.

# Features
- Daily consumption (kWh) and days of autonomy
- Battery chemistries: LFP, AGM, flooded lead-acid, NMC
- System voltage: 12V / 24V / 48V
- Depth of discharge (DoD) per chemistry
- Round-trip efficiency factor
- Temperature derating
- Required capacity in kWh and Ah
- NEC Article 706 references

# Made for
Solar installers, off-grid system designers, energy storage integrators, electrical contractors, NABCEP exam candidates.

# Optional Pro Upgrade — $2.99 one-time
The following features require a separate one-time in-app purchase. They are not required to use the calculator:
- Calculation history (saved & searchable)
- PDF report export with NEC references
- Dark theme
- Ad-free experience