🇷🇴 Solar Calculator Romania

Enter your monthly electricity bill and Romanian city — get solar system size, Casa Verde Fotovoltaice grant up to RON 20,000 (~€4,000) for systems ≤9kWp, prosumer net metering credits, and payback period.

Your electricity details

Monthly electricity bill?

leiRON

City?

System size?

Casa Verde Fotovoltaice grant (≤9kWp)?

Solar system results — Romania

5 kWp system — 1080 kWh/kWp/yr

Monthly kWh usage556 kWh/mo

Annual solar production5.402 kWh/yr

Self-consumption savings2.188 lei/yr

Prosumer export credit (~15c/kWh)446 lei/yr

Total annual benefit2.633 lei/yr

System cost range25.000–35.000 lei (~€5000–€7000)

Net cost after grant30.000 lei

Payback period11.4 years

25-year net savings35.837 lei

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How to Use This Calculator

Enter your monthly bill and city

Enter your average monthly electricity bill in Romanian lei (RON) from your supplier — Electrica, CEZ, E.ON, Enel/Enel X, or others. The calculator uses Romania's average blended retail rate of ~0.90 lei/kWh. Select your city — Constanța (4.0 PSH) on the Black Sea coast is Romania's sunniest city, followed by Craiova and Galați (3.8 PSH). Cluj-Napoca and Brașov (3.5 PSH) receive less radiation due to Carpathian mountain influence.

Set system size and Casa Verde eligibility

Select your system size in kWp. Systems up to 9kWp on residential properties are eligible for the Casa Verde Fotovoltaice grant of up to RON 20,000 (~€4,000), administered by AFM (Administrația Fondului pentru Mediu). Toggle the grant on to see your reduced net cost and dramatically improved payback period.

Prosumer net metering in Romania

Romania's prosumer law (Legea nr. 269/2021) allows solar system owners to sell surplus electricity back to the grid. The prosumer credit rate is approximately 15 lei cents per kWh — lower than the retail rate, but still meaningful for surplus production. Self-consumption at retail rate (~0.90 lei/kWh) remains approximately 6x more valuable than prosumer exports, making self-consumption optimization the priority.

The Formula

Monthly kWh = Monthly Bill ÷ 0.90 lei/kWh (blended RO retail rate) Annual production = kWp × PSH × 365 × 0.80 efficiency Self-consumption = Annual kWh × 45% Self-consumption savings = Self-consumed kWh × 0.90 lei/kWh retail Prosumer export credit = Exported kWh × 0.15 lei/kWh prosumer rate System cost = kWp × 5,000–7,000 lei/kWp (~€1,000–1,400/kWp) Casa Verde grant = up to 20,000 lei (~€4,000) for ≤9kWp residential Net cost = System cost − Casa Verde grant Payback = Net cost ÷ Annual benefit (3–5yr with grant, 7–9yr without)

Romania's solar regulatory framework is based on Legea nr. 220/2008 (renewable energy law) and Legea nr. 269/2021 (prosumer legislation). The Casa Verde Fotovoltaice programme is financed from the state environmental fund and has multiple application rounds. ANRE (Autoritatea Națională de Reglementare în Energie) sets prosumer tariff rules. Note: RON amounts use an approximate EUR rate of 1 EUR = 5 RON for reference.

Example

Mihai — Constanța home, 8kWp, Black Sea sunshine

Mihai pays 700 lei/month in Constanța. He installs an 8kWp system to take advantage of Romania's sunniest city.

Monthly bill700 lei (RON)

City / PSHConstanța, 4.0 PSH

System size8 kWp

Casa Verde grantWithout (>9kWp limit)

Result

Annual production~9,344 kWh/yr

Production per kWp~1,168 kWh/kWp/yr

Self-consumption savings~3,774 lei/yr

Prosumer export credit~771 lei/yr

Total annual benefit~4,545 lei/yr

System cost~48,000 lei (~€9,600)

Payback~10.6 years

25-year net savings~65,625 lei

Constanța's 4.0 PSH — the highest in Romania — produces the most kWh per installed kWp. For systems up to 9kWp, the Casa Verde grant dramatically shortens payback. Even without the grant, Constanța's high solar resource and rising Romanian electricity prices make solar a strong long-term investment.

FAQ

Is solar worth it in Romania? ▼

Yes — Romania has good to excellent solar resources (3.5–4.0 PSH depending on city), and the Casa Verde Fotovoltaice grant of up to RON 20,000 (~€4,000) for systems ≤9kWp makes solar very attractive. With the grant, payback can be as short as 3–5 years — among the fastest in Europe. Without the grant, payback is typically 7–10 years depending on city and system size. Constanța (4.0 PSH) on the Black Sea offers the best solar conditions in Romania.

What is Casa Verde Fotovoltaice? ▼

Casa Verde Fotovoltaice is a Romanian government subsidy programme offering non-refundable grants of up to RON 20,000 (~€4,000) for residential solar photovoltaic systems up to 9kWp. It is administered by AFM (Administrația Fondului pentru Mediu — Environmental Fund Administration) and financed from national environmental fund revenues. Applications open periodically at afm.ro. The grant covers panels, inverter, mounting, and installation. You must use an AFM-approved installer.

How does Romania's prosumer law work? ▼

Romania's prosumer legislation (Legea nr. 269/2021) allows solar system owners to inject surplus electricity into the national grid and receive compensation. Prosumers are credited at approximately 15 lei cents per kWh for exports — lower than the retail rate (~0.90 lei/kWh). The system uses bidirectional meters installed by your distribution operator (Electrica, CEZ, E.ON, etc.). Self-consumption remains much more valuable than exports, so oversizing a system beyond your annual consumption is not recommended.

Which city is best for solar in Romania? ▼

Constanța (4.0 PSH) on the Black Sea coast is Romania's sunniest city — the flat coastal plain and Mediterranean-influenced climate provide excellent solar conditions. Craiova and Galați (3.8 PSH) in southern Romania also benefit from low latitudes and fewer overcast days. București and Timișoara (3.7 PSH) are solid. Iași (3.6 PSH) in northeast Romania follows. Cluj-Napoca and Brașov (3.5 PSH) in the Carpathian highlands receive less radiation but still achieve positive solar economics.

How much does solar cost in Romania? ▼

Solar installation costs in Romania range from RON 5,000 to 7,000 per kWp (~€1,000–1,400/kWp), depending on installer, panel brand, and system complexity. A typical 5kWp residential system costs RON 25,000–35,000 (~€5,000–7,000) before any grants. The Casa Verde Fotovoltaice grant of up to RON 20,000 can cover 50–80% of a small system's total cost, making it one of the most generous solar subsidy programmes in the EU relative to system cost.

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