Solar System & Battery Sizing for 325 kWh/Month in Colorado, USA
Complete photovoltaic engineering breakdown for a 325 kWh/month (10.8 kWh/day) electricity profile in Colorado, USA (5.5 Peak Sun Hours/day).
Technical Specification Table — 325 kWh/Month Solar System (Colorado, USA)
| Monthly / Daily Electricity Consumption | 325 kWh/month (10.8 kWh/day) |
| Location Peak Sun Hours (PSH) | 5.5 hours/day (Colorado, USA) |
| Required PV System Size (80% Performance Ratio) | 2.64 kWp DC |
| Number of Solar Panels (440W N-Type Bifacial) | 6 panels |
| Roof Area Required | 12.3 m² (132 sq ft) |
| Recommended Hybrid Inverter Rating | 3.0 kW AC |
| Recommended LiFePO4 Battery Storage (85% DoD) | 8.2 kWh Nominal (7.0 kWh Usable) |
| Estimated Annual Output | 4,240 kWh/year (~353 kWh/month) |
| Estimated System Turnkey Cost (Before Tax Credits) | $6,996 |
| Annual Electricity Bill Savings (@ $0.16/kWh) | $655/year ($55/month) |
Frequently Asked Questions
How many solar panels are needed for 325 kWh per month in Colorado, USA?
With an average of 5.5 Peak Sun Hours per day in Colorado, USA and an 80% system performance ratio, a monthly usage of 325 kWh (10.8 kWh/day) requires a 2.64 kWp solar array, which equals 6 standard 440W N-Type solar panels occupying 12.3 m² (132 sq ft) of roof space.
What size solar battery bank do I need for 325 kWh/month?
To cover evening and overnight loads (65% of daily consumption at 85% LiFePO4 depth of discharge), a 8.2 kWh nominal (7.0 kWh usable) LiFePO4 battery bank paired with a 3.0 kW hybrid inverter is recommended.
How much money will a 2.64 kW solar system save in Colorado, USA?
Generating approximately 4,240 kWh per year at an average local tariff of $0.16/kWh, the system saves $655 per year ($55/month) with an estimated payback period of 10.7 years.