Solar System & Battery Sizing for 675 kWh/Month in New Jersey, USA
Complete photovoltaic engineering breakdown for a 675 kWh/month (22.5 kWh/day) electricity profile in New Jersey, USA (4.4 Peak Sun Hours/day).
Technical Specification Table — 675 kWh/Month Solar System (New Jersey, USA)
| Monthly / Daily Electricity Consumption | 675 kWh/month (22.5 kWh/day) |
| Location Peak Sun Hours (PSH) | 4.4 hours/day (New Jersey, USA) |
| Required PV System Size (80% Performance Ratio) | 6.6 kWp DC |
| Number of Solar Panels (440W N-Type Bifacial) | 15 panels |
| Roof Area Required | 30.7 m² (330 sq ft) |
| Recommended Hybrid Inverter Rating | 5.9 kW AC |
| Recommended LiFePO4 Battery Storage (85% DoD) | 17.2 kWh Nominal (14.6 kWh Usable) |
| Estimated Annual Output | 8,480 kWh/year (~707 kWh/month) |
| Estimated System Turnkey Cost (Before Tax Credits) | $18,150 |
| Annual Electricity Bill Savings (@ $0.2/kWh) | $1,696/year ($141/month) |
Frequently Asked Questions
How many solar panels are needed for 675 kWh per month in New Jersey, USA?
With an average of 4.4 Peak Sun Hours per day in New Jersey, USA and an 80% system performance ratio, a monthly usage of 675 kWh (22.5 kWh/day) requires a 6.6 kWp solar array, which equals 15 standard 440W N-Type solar panels occupying 30.7 m² (330 sq ft) of roof space.
What size solar battery bank do I need for 675 kWh/month?
To cover evening and overnight loads (65% of daily consumption at 85% LiFePO4 depth of discharge), a 17.2 kWh nominal (14.6 kWh usable) LiFePO4 battery bank paired with a 5.9 kW hybrid inverter is recommended.
How much money will a 6.6 kW solar system save in New Jersey, USA?
Generating approximately 8,480 kWh per year at an average local tariff of $0.2/kWh, the system saves $1,696 per year ($141/month) with an estimated payback period of 10.7 years.