Solar System & Battery Sizing for 300 kWh/Month in Stockholm, Sweden
Complete photovoltaic engineering breakdown for a 300 kWh/month (10.0 kWh/day) electricity profile in Stockholm, Sweden (3.1 Peak Sun Hours/day).
Technical Specification Table — 300 kWh/Month Solar System (Stockholm, Sweden)
| Monthly / Daily Electricity Consumption | 300 kWh/month (10.0 kWh/day) |
| Location Peak Sun Hours (PSH) | 3.1 hours/day (Stockholm, Sweden) |
| Required PV System Size (80% Performance Ratio) | 4.4 kWp DC |
| Number of Solar Panels (440W N-Type Bifacial) | 10 panels |
| Roof Area Required | 20.5 m² (221 sq ft) |
| Recommended Hybrid Inverter Rating | 3.9 kW AC |
| Recommended LiFePO4 Battery Storage (85% DoD) | 7.6 kWh Nominal (6.5 kWh Usable) |
| Estimated Annual Output | 3,983 kWh/year (~332 kWh/month) |
| Estimated System Turnkey Cost (Before Tax Credits) | kr 63,800 |
| Annual Electricity Bill Savings (@ kr 1.85/kWh) | kr 6,993/year (kr 583/month) |
Frequently Asked Questions
How many solar panels are needed for 300 kWh per month in Stockholm, Sweden?
With an average of 3.1 Peak Sun Hours per day in Stockholm, Sweden and an 80% system performance ratio, a monthly usage of 300 kWh (10.0 kWh/day) requires a 4.4 kWp solar array, which equals 10 standard 440W N-Type solar panels occupying 20.5 m² (221 sq ft) of roof space.
What size solar battery bank do I need for 300 kWh/month?
To cover evening and overnight loads (65% of daily consumption at 85% LiFePO4 depth of discharge), a 7.6 kWh nominal (6.5 kWh usable) LiFePO4 battery bank paired with a 3.9 kW hybrid inverter is recommended.
How much money will a 4.4 kW solar system save in Stockholm, Sweden?
Generating approximately 3,983 kWh per year at an average local tariff of kr 1.85/kWh, the system saves kr 6,993 per year (kr 583/month) with an estimated payback period of 9.1 years.