Solar System & Battery Sizing for 3,600 kWh/Month in Arizona, USA
Complete photovoltaic engineering breakdown for a 3,600 kWh/month (120.0 kWh/day) electricity profile in Arizona, USA (6.4 Peak Sun Hours/day).
Technical Specification Table — 3,600 kWh/Month Solar System (Arizona, USA)
| Monthly / Daily Electricity Consumption | 3,600 kWh/month (120.0 kWh/day) |
| Location Peak Sun Hours (PSH) | 6.4 hours/day (Arizona, USA) |
| Required PV System Size (80% Performance Ratio) | 23.76 kWp DC |
| Number of Solar Panels (440W N-Type Bifacial) | 54 panels |
| Roof Area Required | 110.7 m² (1,192 sq ft) |
| Recommended Hybrid Inverter Rating | 21.2 kW AC |
| Recommended LiFePO4 Battery Storage (85% DoD) | 91.8 kWh Nominal (78.0 kWh Usable) |
| Estimated Annual Output | 44,403 kWh/year (~3,700 kWh/month) |
| Estimated System Turnkey Cost (Before Tax Credits) | $58,212 |
| Annual Electricity Bill Savings (@ $0.15/kWh) | $6,660/year ($555/month) |
Frequently Asked Questions
How many solar panels are needed for 3,600 kWh per month in Arizona, USA?
With an average of 6.4 Peak Sun Hours per day in Arizona, USA and an 80% system performance ratio, a monthly usage of 3,600 kWh (120.0 kWh/day) requires a 23.76 kWp solar array, which equals 54 standard 440W N-Type solar panels occupying 110.7 m² (1192 sq ft) of roof space.
What size solar battery bank do I need for 3,600 kWh/month?
To cover evening and overnight loads (65% of daily consumption at 85% LiFePO4 depth of discharge), a 91.8 kWh nominal (78.0 kWh usable) LiFePO4 battery bank paired with a 21.2 kW hybrid inverter is recommended.
How much money will a 23.76 kW solar system save in Arizona, USA?
Generating approximately 44,403 kWh per year at an average local tariff of $0.15/kWh, the system saves $6,660 per year ($555/month) with an estimated payback period of 8.7 years.