Prosumer energy compensation in Romania: how injected energy lowers your bill (2026)
Your solar panels are up, and the practical question finally arrives: what happens to the electricity you feed into the grid? In Romania, the answer runs through your electricity supplier’s invoice. As a registered prosumer (prosumator — a consumer who also produces energy from renewable sources), the kilowatt-hours you inject are offset against the kilowatt-hours you consume, and you pay the difference. Simple in principle, frequently misunderstood in practice. This guide explains how compensation works in 2026, what your bill actually shows, why winter feels expensive even with panels on the roof, and the one condition without which none of it applies.
The principle: two energy flows, one invoice
A prosumer’s point of delivery is equipped with a bidirectional meter, fitted by the distribution operator, Rețele Electrice România S.A. It measures two flows separately:
- Energy consumed — what you draw from the grid when the panels do not cover your needs (at night, in winter, on cloudy days).
- Energy injected — the surplus your system exports when production exceeds what the house is using at that moment.
On the meter display, each flow has its own index code. According to the information published by Rețele Electrice România, index 1.8.0 shows the total active energy you have consumed, while index 2.8.0 shows the active energy produced — that is, the surplus injected into the grid. If you ever read the meter yourself, 2.8.0 is the prosumer’s number to watch.
Your supplier receives both readings and applies the offset on the invoice: injected energy reduces what you owe for consumed energy. You are not running a power plant with a sales contract; you are reducing your own bill.
One detail people miss: self-consumption never reaches the meter. Energy produced and used at the same moment flows directly from inverter to appliances, so the meter only sees the surplus. This is why the “injected” figure on the bill is always smaller than the “produced” figure in your inverter app — the difference is what you consumed on the spot, which is also the most valuable part of your production.
Quantitative compensation vs financial settlement
Romanian rules recognise two broad ways the offset can be applied:
- Quantitative compensation (compensare cantitativă): kWh against kWh. Each kilowatt-hour you inject cancels a kilowatt-hour you consumed in the billing period. Surplus that is not used up is typically carried forward and offset against future consumption, under the rules of your supply contract.
- Financial settlement (regularizare financiară): the injected energy is valued in money at a price defined by your contract and the applicable rules, and the resulting amount is deducted from your invoice or credited to your account.
Which regime applies to you depends mainly on the installed power of your generating system and on the ANRE regulations in force, together with your supplier’s contractual terms. We deliberately do not quote power thresholds here: they are set by regulation, they have changed before, and they can change again. The authoritative source for your situation is the prosumer annex to your supply contract — and, if anything is unclear, a written question to your supplier.
One more honest note: depending on the regime, not every component of the bill is offset. An invoice contains active energy, network tariffs, taxes and levies; how far the compensation reaches follows the regulations in force. Two neighbours with identical systems but different suppliers can see visibly different bills — neither is necessarily wrong.
What you actually see on the bill
A typical prosumer invoice adds a few lines to the familiar layout:
| Line on the invoice | What it means |
|---|---|
| Energy consumed (kWh) | What you drew from the grid in the billing period |
| Energy injected (kWh) | The surplus your system exported |
| Compensation applied | The offset between the two, under your regime |
| Surplus carried forward / credit | Injected energy not yet used up by consumption |
| Fixed components | Subscription-type charges that do not depend on the offset |
Checking the numbers without going mad
- Compare the injected figure with your inverter’s export (grid feed-in) statistic, not with total production.
- Expect a lag: meters are read and processed on the operator’s cycle, so the bill may trail your app by weeks.
- Watch the carried-forward surplus from month to month — that is your summer work paying off in autumn.
- If the bill seems to run on estimates, send a self-reading: Rețele Electrice România accepts readings through its online “Încărcare autocitiri” form, where you submit your POD code, the meter serial number, the date, the index values and a photo of the meter screen. Without a self-reading, the supplier bills on estimated consumption.
If a bill arrives with the injection line at zero even though your app shows exports, the usual suspects are an unprocessed meter reading or a prosumer annex that has not yet been activated. Both are fixable — a self-reading with a photo showing index 2.8.0 makes a useful piece of evidence — and worth chasing in writing.
Why winter consumes what summer saved
Production and consumption are out of phase by nature. A photovoltaic system in the Bucharest–Ilfov–Giurgiu area produces the bulk of its energy from April to September, while a household consumes most of its electricity from November to February. The result is a predictable annual rhythm:
- Summer: long days, low consumption, large surpluses — credit accumulates.
- Winter: short days, heating and lighting running — you draw heavily from the grid and inject little. The accumulated credit softens the blow, but rarely eliminates it.
A correctly sized residential system lowers the annual cost substantially; it almost never makes the January bill zero. If someone promised you otherwise, they were selling panels, not explaining billing.
Why compensation is not “money in your account”
Three practical truths for 2026:
- The default outcome is a smaller bill, not a payment. Most suppliers apply the offset and carry surpluses forward as credit against future invoices.
- Payouts of surplus, where they exist, follow the supplier’s rules and the ANRE regulations in force — they are the exception in residential contracts, not the norm.
- The economics favour self-consumption. A kWh you use directly replaces energy bought at full retail price; a kWh you inject comes back through a mechanism with more friction. Shifting consumption into daylight hours (boiler, washing machine, car charging) is the cheapest optimisation available.
Condition zero: you must be connected as a prosumer
None of the above happens automatically when panels go on the roof. Compensation starts only when your system is officially connected, which means:
- ATR — the aviz tehnic de racordare, the technical connection approval issued by Rețele Electrice România S.A., setting out the technical solution and the approved power.
- Execution of the works by an ANRE-certified company, following the approved solution — for larger systems this often means a three-phase connection (from 2,900 lei if your site needs the upgrade).
- Certificat de racordare — the connection certificate confirming the installation was completed and accepted.
- Bidirectional meter fitted by the operator, followed by the prosumer annex signed with your supplier.
Until the certificate is issued and the meter is in place, your exports are neither measured nor compensated — and injecting without authorisation is a compliance problem, not a clever shortcut. The full sequence, with documents and timelines, is in our step-by-step prosumer connection guide.
Where SUN WATT fits in (and where we don’t)
To be clear about what we do: SUN WATT SRL (ANRE certificate no. 19761) does not sell or install solar panels. We handle the part most installers dislike — the grid connection. Our prosumer grid connection service covers the complete dossier, the ATR application, coordination with Rețele Electrice România S.A., the connection certificate and the bidirectional meter stage, for homes and businesses in Bucharest, Ilfov and Giurgiu.
Because every site is different (existing connection, approved power, distance to the network), prosumer connection work is priced through a personalised quote. For reference: ATR assistance starts from 350 lei, and a complete connection dossier with design starts from 900 lei.
Get the paperwork moving
If your panels are installed but the compensation has not started — or you want the connection handled correctly from day one — call 0733 097 440 or write to us via the contact page. We will tell you honestly what your file needs, what it costs and how long it takes, before you commit to anything.