Solar System & Battery Sizing for 12,000 kWh/Month in Geneva, Switzerland
Complete photovoltaic engineering breakdown for a 12,000 kWh/month (400.0 kWh/day) electricity profile in Geneva, Switzerland (3.8 Peak Sun Hours/day).
Technical Specification Table — 12,000 kWh/Month Solar System (Geneva, Switzerland)
| Monthly / Daily Electricity Consumption | 12,000 kWh/month (400.0 kWh/day) |
| Location Peak Sun Hours (PSH) | 3.8 hours/day (Geneva, Switzerland) |
| Required PV System Size (80% Performance Ratio) | 132.0 kWp DC |
| Number of Solar Panels (440W N-Type Bifacial) | 300 panels |
| Roof Area Required | 615.0 m² (6,620 sq ft) |
| Recommended Hybrid Inverter Rating | 117.9 kW AC |
| Recommended LiFePO4 Battery Storage (85% DoD) | 305.9 kWh Nominal (260.0 kWh Usable) |
| Estimated Annual Output | 146,467 kWh/year (~12,206 kWh/month) |
| Estimated System Turnkey Cost (Before Tax Credits) | CHF 323,400 |
| Annual Electricity Bill Savings (@ CHF 0.3/kWh) | CHF 43,940/year (CHF 3,662/month) |
Frequently Asked Questions
How many solar panels are needed for 12,000 kWh per month in Geneva, Switzerland?
With an average of 3.8 Peak Sun Hours per day in Geneva, Switzerland and an 80% system performance ratio, a monthly usage of 12,000 kWh (400.0 kWh/day) requires a 132.0 kWp solar array, which equals 300 standard 440W N-Type solar panels occupying 615.0 m² (6620 sq ft) of roof space.
What size solar battery bank do I need for 12,000 kWh/month?
To cover evening and overnight loads (65% of daily consumption at 85% LiFePO4 depth of discharge), a 305.9 kWh nominal (260.0 kWh usable) LiFePO4 battery bank paired with a 117.9 kW hybrid inverter is recommended.
How much money will a 132.0 kW solar system save in Geneva, Switzerland?
Generating approximately 146,467 kWh per year at an average local tariff of CHF 0.3/kWh, the system saves CHF 43,940 per year (CHF 3,662/month) with an estimated payback period of 7.4 years.