Documents required for a power upgrade: the complete list and the traps to avoid (2026 guide)

Do your fuses trip when you switch on several appliances at once, have you installed a heat pump, or do you want an electric-vehicle charging point while your current approved power can no longer cope? The first legal step is a power upgrade request submitted to the distribution operator. The dossier is not complicated, but it has a few mandatory documents and a few traps that will delay the process by weeks if you miss them. Below is the complete list, explained document by document, plus the special cases that change what you have to submit.

For an overview of the procedure and the costs, see also the power upgrade page. This guide goes into detail on the documents and the dossier.

What a power upgrade request actually is

The power upgrade request (formally, a “grid connection application for the modification of the approved power”) is how you ask the distribution operator to increase the electrical power available at your existing connection. The approved power is the value in kW that the operator guarantees you contractually and which determines the sizing of the connection, the meter and the protections.

Important: you either stay on the same type of supply (a “classic” power upgrade) or you move from single-phase to three-phase — these are related procedures, but they have different implications for the dossier. We cover them separately below.

The complete list of required documents

The standard power upgrade dossier contains the following documents:

1. The grid connection / power upgrade application — the operator’s standard form, with the “modification of approved power” option ticked.
2. The identity document of the applicant (individual) or the registration certificate (CUI, for a legal entity).
3. Proof of ownership or right of use over the property — land registry extract, sale-purchase contract or tenancy agreement.
4. The owner’s consent, if the applicant is a tenant.
5. The latest electricity bill or the supply contract — needed to identify the POD (Point of Delivery) code and the current approved power.
6. The technical memorandum and the absorbed power calculation sheet — drawn up by an ANRE-certified firm, such as SUN WATT SRL.
7. The site plan and the location plan.
8. The urban planning certificate — only if the upgrade involves a grid extension, construction, or works that require it.

What each document is, where you get it and the traps to avoid

The grid connection / power upgrade application

This is the standard form of the operator Retele Electrice Romania S.A., in which you fill in your details, the address of the place of consumption, the POD code, the current approved power and the requested power. Common trap: a blank field or an error in the POD code or in the current power — the most frequent reasons for rejection or for a request for completion, which resets the deadlines. We fill in and check the form before submission.

The identity document / registration certificate

For an individual, the identity card is enough. For companies, you submit the registration certificate (CUI) and, as a rule, a recent company standing certificate confirming that the company is active and who represents it legally. Trap: a standing certificate that is too old may be rejected — request it shortly before submission.

Proof of ownership or right of use

The land registry extract must be recent and must match the address of the place of consumption exactly. If you are not the owner, you can submit the tenancy agreement, but then you also need the owner’s consent (see below). Trap: an old land registry extract, showing an owner different from the holder of the place of consumption, will block the dossier — check that it is up to date before submitting.

The owner’s consent (for tenants)

This is a written document through which the property owner gives consent for the modification of the approved power, because the work affects the connection and the fixed installation of the property, not just the tenant’s supply contract. Trap: without this signed consent, the operator will not process the request, regardless of the tenancy agreement submitted.

The latest electricity bill / supply contract

This is where you find the POD code, which uniquely identifies the place of consumption, and the approved power currently in force — the baseline data that the operator compares against your request. Trap: if you have recently changed supplier or contract holder, make sure the bill reflects the current situation, otherwise discrepancies will appear during verification.

The technical memorandum and the power calculation sheet

This is the technical document that justifies the requested upgrade: it lists the loads (appliances, heat pump, charging station, machine tools) and calculates the simultaneously absorbed power. It is drawn up exclusively by an ANRE-certified electrician or firm. Trap: an incomplete or poorly justified calculation sheet is the most frequent cause of technical rejection of the dossier — which is why we recommend it be prepared by the firm that also carries out the work.

The site plan and the location plan

This is a drawing showing the position of the property and of the existing connection relative to the operator’s grid. Trap: an outdated plan that does not reflect recent buildings or extensions can trigger requests for completion.

The urban planning certificate

It is not required for every power upgrade — only when the work involves a grid extension, a new building, or changes that fall under planning legislation. Trap: many applicants submit it unnecessarily or, conversely, fail to submit it when it was required; we establish at the assessment stage whether your situation calls for it.

Special cases that change the dossier

Tenant vs owner

As an owner, you submit the dossier with your own documents and nothing extra. As a tenant, you also need the owner’s written consent — agree in advance who bears the cost of the work, because the investment (connection, cable, cabinet) normally stays with the property.

Individual vs legal entity

For companies, the identity document is replaced by the registration certificate (CUI) and the standing certificate, and the signature on the application and the contracts must come from the administrator or from an agent explicitly empowered through a power of attorney, with clear powers: submitting the dossier, collecting the ATR, signing connection contracts. The rest of the dossier (ownership, bill, technical memorandum, site plan) is identical to that of an individual.

Existing premises vs new build

For a power upgrade at a property that is already connected, the dossier above is sufficient in most cases. If, however, the power increase is requested together with an extension or a new building at the same place of consumption, the procedure comes closer to a full electricity grid connection, with an urban planning certificate and possibly a building permit.

Switching from single-phase to three-phase

A “classic” power upgrade means increasing the value in kW on the same type of supply. Moving from single-phase (230 V) to three-phase (400 V) is a larger job, which normally involves replacing the connection, the rising main and the meter, with a separate Technical Connection Approval for the three-phase solution. The set of documents is similar, but the details of the existing connection are added (current approved power, place-of-consumption code). Full details on the single-phase to three-phase page.

What happens after the dossier is submitted

1. Technical analysis — the operator checks whether the local grid can carry the requested power.
2. Issuing a new ATR — the Technical Connection Approval sets the technical solution (whether changes to the connection are needed) and the connection tariff for the new power.
3. The connection contract — signed after the ATR, with the established tariff paid.
4. Execution of the changes, if needed — replacing the cable, the cabinet or the protections, carried out by the ANRE-certified firm.
5. Updating the Utilisation Installation Dossier — required for the new meter. Details on the DIU dossier page.
6. New meter and energisation — the operator installs or reconfigures the meter at the increased approved power.

How much a power upgrade costs

Labour for documentation and assistance starts from 350 lei, excluding the operator’s fees. What drives the final price:

• how many kW you request and whether the new power fits within the existing connection or requires changes;
• whether you stay single-phase or move to three-phase — switching to three-phase starts from 2,500 lei, execution included;
• the connection tariff set by the operator through the new ATR, visible only once the approval is issued;
• the need for an updated DIU dossier, from 1,200 lei, if the operator requires it for the new meter.

For an indicative estimate you can use the connection cost calculator or check the full price list. A detailed model of the application form is also available in the power upgrade request: template and documents guide.

Common mistakes when submitting the dossier

1. A wrong or missing POD code — the most frequent cause of rejection; you will find it on any recent electricity bill.
2. An outdated land registry extract — if it does not reflect the current situation of the owner or the property, the dossier is rejected at verification.
3. A superficial technical memorandum — a calculation sheet that does not clearly justify the requested power delays the operator’s technical analysis.
4. Missing owner’s consent, when the applicant is a tenant — this blocks the submission, regardless of the other documents.
5. Confusing a power upgrade with switching to three-phase — these are related procedures, but with different dossiers and costs; clarify at the assessment stage which one applies to you.
6. Submitting an incomplete dossier “to get in the queue faster” — any subsequent completion generally resets the analysis deadline.

How bransam.ro helps

As an ANRE-certified firm for execution and design, we prepare the complete power upgrade dossier: the application, the technical memorandum with the calculation sheet; we check the ownership documents and submit everything to Retele Electrice Romania S.A. We assist you until the new ATR is issued and carry out the changes to the connection, if needed, through to energisation at the increased power.

We operate in Bucharest, Ilfov and Giurgiu. Call 0733 097 440 or write to us through the contact page — we will tell you exactly which documents you need for your situation, before you submit any request.