What does your electricity really cost with solar panels?

Energy prices continue to fluctuate, the net metering scheme is expiring, and feed-in tariffs are steadily decreasing. Yet, solar energy remains a smart investment – even without being allowed to feed energy back into the grid.

Why? Because with solar panels, you generate your own electricity for a fraction of the price you'd otherwise pay from your energy supplier.

🔍 Analysis example

We used a standard household with 10 solar panels as an example. These generate approximately 3,800 kWh of solar energy annually. With and without battery storage, you consume a portion of this yourself:

Scenario	Own consumption per year
Without battery	1,330 kWh (35%)
With battery (10 kWh)	2,660 kWh (70%)

Calculation parameters

• Investment in solar panels: €3,900
• Inverter replacement in year 12: €1,000
• Battery (optional): €2,934 (2× Marstek Venus E 5.24 kWh incl. installation)
• Analysis period: 25 years
• Average electricity price for the next 25 years: €0.238 per kWh

💡 Cost per kWh (LCOE)

We calculated the levelized cost of electricity (LCOE) : what does your own electricity cost, on average over 25 years?

Scenario	Your electricity price	Savings compared to gray power	Total savings (25 years)
Without battery	€0.147/kWh	–38% / €0.091 per kWh	€3,013
With battery (70%)	€0.118/kWh	–50% / €0.120 per kWh	€7,993

📉 Even without a battery, you pay almost 40% less per kWh than your energy supplier.

🔋 With a battery, you use more of your own power – and double your savings.

🔋 When is battery storage interesting?

• You use a lot of electricity in the evening (heat pump, EV, cooking)
• Your yield is not immediately consumed during the day
• You want to be independent of feed-in tariffs or grid congestion

💡 With a well-tuned battery, you can use up to 70% of your solar power yourself. You avoid feed-in costs and save more.

📊 Summary

• ✅ Lower electricity costs
• ✅ Less dependent on the market
• ✅ Benefit from cheap electricity for 25 years

If you opt for a smart design tailored to your consumption, you will pay for your electricity for only €0.12 to €0.15 per kWh .

🚀 Personal advice