About Solar PV System Sizing & Battery Storage Calculator
Engineering-grade solar photovoltaic (PV) and energy storage sizing studio. Computes recommended solar array size in kWp based on monthly electricity consumption (kWh) and regional Peak Sun Hours (PSH). Calculates required number of solar panels, roof area (m² and sq ft), lithium LiFePO4 vs lead-acid battery bank capacity (kWh and Ah), annual kWh yield, and CO2 environmental offset.
Key Capabilities & Features
- Peak Sun Hours (PSH) solar insolation modeling with 78% realistic system derating factor
- Solar array capacity (kWp) and panel count sizing for 375W to 550W modern modules
- Required roof space calculation in both metric (m²) and imperial (sq ft)
- Battery storage bank sizing in kWh and Amp-Hours (Ah) for 12V, 24V, and 48V systems
- Annual green carbon footprint reduction (metric tons of CO2 and equivalent trees planted)
How to Use Solar PV System Sizing & Battery Storage Calculator
Input Monthly Energy Usage
Enter your average monthly electricity consumption from your utility bill in kWh.
Select Location Insolation
Choose your regional Peak Sun Hours (PSH) from UK/Northern Europe to sunny deserts.
Review Solar & Battery Spec
Inspect recommended kWp array rating, panel count, roof area, and battery storage capacity.
Privacy & In-Browser Execution Guarantee
100% client-side engineering math. Your location parameters and home energy bills are never sent to external servers.
Frequently Asked Questions
What is Peak Sun Hours (PSH)?
Peak Sun Hours is not the number of hours the sun is in the sky. It is the equivalent number of hours per day when solar solar irradiance reaches an intensity of 1,000 W/m², used as the standard benchmark for photovoltaic generation.
Why is LiFePO4 battery depth-of-discharge (DoD) superior?
Lithium Iron Phosphate (LiFePO4) batteries can safely discharge up to 90% of their rated capacity without accelerating cell degradation. In contrast, traditional Lead-Acid batteries should not be discharged beyond 50% DoD to avoid severe cycle life reduction.