Solar System & Battery Sizing for 800 kWh/Month in Stavanger, Norway
Complete photovoltaic engineering breakdown for a 800 kWh/month (26.7 kWh/day) electricity profile in Stavanger, Norway (2.9 Peak Sun Hours/day).
Technical Specification Table — 800 kWh/Month Solar System (Stavanger, Norway)
| Monthly / Daily Electricity Consumption | 800 kWh/month (26.7 kWh/day) |
| Location Peak Sun Hours (PSH) | 2.9 hours/day (Stavanger, Norway) |
| Required PV System Size (80% Performance Ratio) | 11.88 kWp DC |
| Number of Solar Panels (440W N-Type Bifacial) | 27 panels |
| Roof Area Required | 55.3 m² (595 sq ft) |
| Recommended Hybrid Inverter Rating | 10.6 kW AC |
| Recommended LiFePO4 Battery Storage (85% DoD) | 20.4 kWh Nominal (17.3 kWh Usable) |
| Estimated Annual Output | 10,060 kWh/year (~838 kWh/month) |
| Estimated System Turnkey Cost (Before Tax Credits) | kr 180,576 |
| Annual Electricity Bill Savings (@ kr 1.4/kWh) | kr 14,084/year (kr 1,174/month) |
Frequently Asked Questions
How many solar panels are needed for 800 kWh per month in Stavanger, Norway?
With an average of 2.9 Peak Sun Hours per day in Stavanger, Norway and an 80% system performance ratio, a monthly usage of 800 kWh (26.7 kWh/day) requires a 11.88 kWp solar array, which equals 27 standard 440W N-Type solar panels occupying 55.3 m² (595 sq ft) of roof space.
What size solar battery bank do I need for 800 kWh/month?
To cover evening and overnight loads (65% of daily consumption at 85% LiFePO4 depth of discharge), a 20.4 kWh nominal (17.3 kWh usable) LiFePO4 battery bank paired with a 10.6 kW hybrid inverter is recommended.
How much money will a 11.88 kW solar system save in Stavanger, Norway?
Generating approximately 10,060 kWh per year at an average local tariff of kr 1.4/kWh, the system saves kr 14,084 per year (kr 1,174/month) with an estimated payback period of 12.8 years.