Solar System & Battery Sizing for 1,275 kWh/Month in Geneva, Switzerland
Complete photovoltaic engineering breakdown for a 1,275 kWh/month (42.5 kWh/day) electricity profile in Geneva, Switzerland (3.8 Peak Sun Hours/day).
Technical Specification Table — 1,275 kWh/Month Solar System (Geneva, Switzerland)
| Monthly / Daily Electricity Consumption | 1,275 kWh/month (42.5 kWh/day) |
| Location Peak Sun Hours (PSH) | 3.8 hours/day (Geneva, Switzerland) |
| Required PV System Size (80% Performance Ratio) | 14.08 kWp DC |
| Number of Solar Panels (440W N-Type Bifacial) | 32 panels |
| Roof Area Required | 65.6 m² (706 sq ft) |
| Recommended Hybrid Inverter Rating | 12.6 kW AC |
| Recommended LiFePO4 Battery Storage (85% DoD) | 32.5 kWh Nominal (27.6 kWh Usable) |
| Estimated Annual Output | 15,623 kWh/year (~1,302 kWh/month) |
| Estimated System Turnkey Cost (Before Tax Credits) | CHF 34,496 |
| Annual Electricity Bill Savings (@ CHF 0.3/kWh) | CHF 4,687/year (CHF 391/month) |
Frequently Asked Questions
How many solar panels are needed for 1,275 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 1,275 kWh (42.5 kWh/day) requires a 14.08 kWp solar array, which equals 32 standard 440W N-Type solar panels occupying 65.6 m² (706 sq ft) of roof space.
What size solar battery bank do I need for 1,275 kWh/month?
To cover evening and overnight loads (65% of daily consumption at 85% LiFePO4 depth of discharge), a 32.5 kWh nominal (27.6 kWh usable) LiFePO4 battery bank paired with a 12.6 kW hybrid inverter is recommended.
How much money will a 14.08 kW solar system save in Geneva, Switzerland?
Generating approximately 15,623 kWh per year at an average local tariff of CHF 0.3/kWh, the system saves CHF 4,687 per year (CHF 391/month) with an estimated payback period of 7.4 years.