There is always talk about "savings with photovoltaics" but few articles provide concrete figures. Here is the calculation for a typical house in Romania 2026.
Reference house profile
- Family 4 people (2 adults + 2 children)
- Living area: 130 m²
- Equipment: fridge, washing machine, dishwasher, AC, combined heating
- Actual annual consumption: 6,500 kWh (average 18 kWh/day)
- Average monthly bill: 460 lei
The chosen photovoltaic system
- 10× TOPCon 550W panels = 5.5 kWp
- Deye 6 kW hybrid inverter
- LiFePO4 10 kWh battery
- Structure + cables + turnkey assembly
- Total investment: €8,500 (~42,500 lei)
Estimated production
5.5 kWp × 1,300 kWh/kWp/year = 7,150 kWh/year
Distributed monthly:
| Moon | Production (kWh) | Consumption (kWh) | Net |
|---|---|---|---|
| Jan | 250 | 720 | -470 |
| Feb | 320 | 650 | -330 |
| Mar | 520 | 520 | 0 |
| April | 720 | 440 | +280 |
| May | 880 | 450 | +430 |
| June | 950 | 580 | +370 |
| Jul | 970 | 720 | +250 |
| August | 900 | 660 | +240 |
| Sept | 680 | 480 | +200 |
| October | 450 | 510 | -60 |
| Nov | 280 | 630 | -350 |
| Dec | 230 | 720 | -490 |
| Totally | 7.150 | 6.580 | +570 |
How it translates into money
No battery scenario
- Direct self-consumption (sun hours): ~35% of production = 2,500 kWh × 0.85 lei = 2,125 lei saved
- Surplus injected into the network: ~4,650 kWh × 0.42 lei = 1,953 lei won
- Total annual savings: 4,078 lei
Scenario with 10 kWh battery (recommended)
- Direct self-consumption + battery: ~75% of production = 5,360 kWh × 0.85 = 4,556 lei saved
- Injected surplus: 1,790 kWh × 0.42 lei = 751 lei won
- Total annual savings: 5,307 lei
Depreciation
Investment 42,500 lei / 5,307 lei per year = payback in 8 years
With Casa Verde 2026 (20,000 lei voucher) → net investment 22,500 lei → payback in 4.2 years
For 25 years
Total production: 7,150 × 25 × 0.95 (degradation) = 169,844 kWh
Value saved: 169,844 × 0.75 lei = 127,383 lei
Net profit compared to the investment: ~85,000 lei (or 105,000 lei with Casa Verde)
Unquantifiable additional benefits
- Autonomy during power failure (10 kWh = ~24 hours minimum system)
- Protection against tariff increases
- Real estate added value (+5-8% house value)
- Partial energy independence
- Carbon footprint reduction (-3.5 tonnes CO2/year)
Figures validated based on actual invoices from EcoSolaris customers. Request a personalized offer calculated on your exact consumption.
Hello, I saw the article and I want a personalized offer. What email do I contact you on?
Very clearly explained. You solved many of my doubts related to photovoltaic systems
mother, how quickly this field evolves. the article is excellent, thank you
Yes, our articles and tables are updated quarterly. We will notify you when new versions appear.
Hello, I saw the article and I want a personalized offer. What email do I contact you on?
Very clearly explained. You solved many of my doubts related to photovoltaic systems
The article confirms what the installer told me. Good to know!
I live in an apartment block, how can I benefit from solar energy?
Your articles are always informative. Keep going!
For the residents of the block, there are solutions with mini panels on the balcony (plug-and-play) with a power of 800W-2kW. It does not require special authorizations.
thank you for the details, especially for the table, you helped us understand better
For the residents of the block, there are solutions with mini panels on the balcony (plug-and-play) with a power of 800W-2kW. It does not require special authorizations.
Hello! Prices are updated monthly on the website. For the offer valid today, we recommend you call us directly.
Congratulations, the article has all the important information. Compared to other sites, you are much more detailed
Hello! Prices are updated monthly on the website. For the offer valid today, we recommend you call us directly.
For the residents of the block, there are solutions with mini panels on the balcony (plug-and-play) with a power of 800W-2kW. It does not require special authorizations.