Solar System & Battery Sizing for 1,225 kWh/Month in Geneva, Switzerland
Complete photovoltaic engineering breakdown for a 1,225 kWh/month (40.8 kWh/day) electricity profile in Geneva, Switzerland (3.8 Peak Sun Hours/day).
Technical Specification Table — 1,225 kWh/Month Solar System (Geneva, Switzerland)
| Monthly / Daily Electricity Consumption | 1,225 kWh/month (40.8 kWh/day) |
| Location Peak Sun Hours (PSH) | 3.8 hours/day (Geneva, Switzerland) |
| Required PV System Size (80% Performance Ratio) | 13.64 kWp DC |
| Number of Solar Panels (440W N-Type Bifacial) | 31 panels |
| Roof Area Required | 63.5 m² (684 sq ft) |
| Recommended Hybrid Inverter Rating | 12.2 kW AC |
| Recommended LiFePO4 Battery Storage (85% DoD) | 31.2 kWh Nominal (26.5 kWh Usable) |
| Estimated Annual Output | 15,135 kWh/year (~1,261 kWh/month) |
| Estimated System Turnkey Cost (Before Tax Credits) | CHF 33,418 |
| Annual Electricity Bill Savings (@ CHF 0.3/kWh) | CHF 4,540/year (CHF 378/month) |
Frequently Asked Questions
How many solar panels are needed for 1,225 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 1,225 kWh (40.8 kWh/day) requires a 13.64 kWp solar array, which equals 31 standard 440W N-Type solar panels occupying 63.5 m² (684 sq ft) of roof space.
What size solar battery bank do I need for 1,225 kWh/month?
To cover evening and overnight loads (65% of daily consumption at 85% LiFePO4 depth of discharge), a 31.2 kWh nominal (26.5 kWh usable) LiFePO4 battery bank paired with a 12.2 kW hybrid inverter is recommended.
How much money will a 13.64 kW solar system save in Geneva, Switzerland?
Generating approximately 15,135 kWh per year at an average local tariff of CHF 0.3/kWh, the system saves CHF 4,540 per year (CHF 378/month) with an estimated payback period of 7.4 years.