A solar system can look finished the moment the scaffold comes down, but the job is not truly complete until the paperwork is in your hands. Solar installation documentation explained properly means knowing what each record proves, why you may need it later, and what to check before making the final payment.

For homeowners in Kent, this is more than an administrative detail. The right documents support export payments, electrical safety, insurance queries, equipment warranties and, if you sell in future, confidence for a buyer. A good installer should explain the handover pack in plain English, not send a bundle of attachments and leave you to work it out alone.

What should be in your solar handover pack?

The exact documents depend on the system. A straightforward solar PV installation will need less paperwork than a system with battery storage, an EV charger, backup power capability or a new-build connection. However, a complete handover pack will normally include the following core records:

  • the quotation, final specification and system design
  • electrical test results and an Electrical Installation Certificate
  • the MCS certificate, where the installation is completed under the MCS scheme
  • Distribution Network Operator, or DNO, paperwork
  • Building Regulations compliance notification where applicable
  • product manuals, datasheets and warranty information for panels, inverter, battery and mounting equipment
  • monitoring instructions, shutdown procedure and maintenance guidance.

These documents should agree with one another. If your quote says one battery model and the final paperwork shows another, ask why. Sometimes a sensible substitution is necessary because of stock availability or a revised design, but it should be clearly discussed and recorded.

The quote and final system specification

Your quote is the starting point for the entire project. It should set out the number and type of panels, proposed inverter, battery capacity if included, mounting method, anticipated generation and any electrical works needed at the property. It is not a guaranteed savings promise. Generation estimates are based on assumptions about roof orientation, shading, location and how the system is used.

The final specification confirms what was actually fitted. Keep it with your other documents, especially if you have a battery. Battery usable capacity, power output and backup capability are often confused, and the paperwork helps establish what your system is designed to do. A battery that powers selected circuits during a power cut is different from one that simply stores solar energy for evening use.

Solar installation documentation explained: certificates that matter

Certificates can sound similar, but they serve different purposes. The most useful question is not simply, “Have I got a certificate?” It is, “What does this certificate confirm?”

Electrical Installation Certificate

Solar PV and battery equipment must be installed and tested safely. The Electrical Installation Certificate, often shortened to EIC, records the electrical work, test results and relevant circuit details. It should identify the installer, the installation address, the date, and the work carried out.

This certificate matters if an electrician later needs to alter your consumer unit, add an EV charger or investigate a fault. It also gives you evidence that the installation was tested at completion, rather than merely connected and switched on. Store the EIC safely and provide a copy to anyone carrying out future electrical work.

MCS certificate

MCS certification is particularly significant for domestic solar. Where your installation has been completed by an MCS-certified contractor under the scheme, the MCS certificate is the document commonly requested when applying for a Smart Export Guarantee tariff. This is how many homeowners receive payment for surplus electricity exported to the grid.

Check that the address, installation date, technology and declared capacity are correct. If there is an error, raise it promptly. An inaccurate address or system capacity can delay an export application and create avoidable follow-up work.

MCS certification is also a useful quality signal, but it does not remove the need to read your warranty conditions or understand how the system operates. It is one part of a properly managed installation, not a substitute for good workmanship and clear aftercare.

DNO notification or approval

Your local electricity network is managed by a Distribution Network Operator. Solar PV and batteries that can export electricity need to be notified to, or approved by, the DNO. The route depends largely on the size and configuration of the system.

Many standard domestic installations can be notified after installation through the relevant process. Larger systems, or systems that exceed permitted export limits, may need approval before work begins. Your paperwork should show which process applies and provide any reference number or approval letter.

Do not assume your electricity supplier handles this. Your supplier bills you for electricity and may offer an export tariff; the DNO manages the local network connection. They are different organisations with different responsibilities.

Building Regulations compliance

Electrical work in homes is subject to Building Regulations requirements. When work is completed by an installer registered with an appropriate competent person scheme, the relevant compliance notification is usually arranged through that route. You should receive confirmation for your records.

There can be additional considerations where a property is listed, in a conservation area, has an unusual roof construction or is part of a new-build development. Planning permission is not required for every solar installation, but it should never be guessed. A proper survey identifies issues early, before equipment is ordered or scaffold is booked.

Why warranty paperwork deserves more attention

A solar installation is made up of several products, and their warranties are not all the same. Solar panels may have a product warranty and a separate performance warranty. Inverters typically have a different term. Battery warranties commonly include conditions around throughput, operating temperature, internet connection and registration.

The installer workmanship warranty is separate again. It covers the quality of installation work for the stated period, not every possible equipment failure for decades to come. A clear handover pack should help you distinguish between manufacturer cover and installer support, so you know who to contact first if something goes wrong.

Some manufacturers require the owner to register equipment within a set time after commissioning. Others allow the installer to do this. Ask for confirmation that registration has been completed, or complete it yourself while the installation details are readily available. Keep serial numbers, purchase documents and commissioning records together.

The design documents that help years later

The least glamorous pages in the pack can be the most valuable. A layout drawing shows where panels are installed and how they are grouped. A single-line diagram shows the basic electrical arrangement, including isolators, inverter, battery and consumer unit connections. A commissioning record confirms key settings when the system was put into service.

These documents make future work safer and more efficient. If you later add a battery, change an inverter, install an EV charger or renovate a roof, the next contractor has a reliable starting point. Without them, they may need to spend time tracing circuits and checking assumptions, which can add cost.

They are also helpful after a fault. Monitoring apps are useful, but an app screen is not a full record of how the system was designed. Keep a digital copy in secure storage and a printed copy somewhere accessible in the home.

What to check at handover

Before the installer leaves, you should know how to view generation, how to identify a fault message, and how to safely isolate the system in an emergency. The explanation does not need to be overly technical, but it should be practical. If a battery or inverter loses its internet connection, for example, you should know whether this affects generation, monitoring only, or both.

Check that you have the login details for any monitoring portal and that they are registered in your name or accessible to you. Ask where the AC and DC isolators are located, what normal indicator lights look like, and who to call if the system stops generating. If you have backup circuits, ask for a demonstration of exactly what remains powered and what does not.

It is sensible to photograph the installed equipment, labels, serial numbers and isolation points. This is useful for insurance, warranty claims and future maintenance. Tell your home insurer about the installation too, as panels and batteries can affect the details they hold about the property.

Common paperwork problems and how to avoid them

The most frequent issue is not missing paperwork entirely, but paperwork arriving without explanation. A homeowner may receive a certificate, a DNO reference and several manuals without knowing which document is needed for export payments or warranty registration. A careful installer should make that distinction clear at completion.

Another common problem is waiting too long to apply for an export tariff. Your system can generate electricity from day one, but export payment arrangements are separate and require an application to a supplier. Requirements vary by supplier, so retain your MCS certificate, DNO information and export meter details.

Finally, make sure the documents reflect the final installation rather than the original proposal. If site conditions led to a revised panel layout, inverter or battery configuration, the drawings and certificates should show the completed system.

At Baird And Brown LTD, documentation is treated as part of the installation, not an afterthought. The best time to ask questions is at handover, while the person who designed and fitted the system can talk you through it. A well-organised pack will not make your roof generate more power, but it will make ownership simpler, protect your investment and leave you better prepared for whatever you add to your home next.