A solar survey is where an initial estimate becomes a proposal designed around your property. A little preparation can help the installer assess your roof, electricity use and practical options accurately, reducing the risk of surprises later. If you are wondering how to prepare for a solar survey, focus on giving the surveyor clear access and the right information rather than trying to solve the technical details yourself.
The best surveys are a conversation. You know how your home or business uses energy day to day; an experienced, MCS-accredited installer knows how to turn that information into a safe, sensible system design.
What happens during a solar survey?
A survey may take place in person, remotely, or as a combination of both. A remote assessment can provide a useful early indication using roof imagery and the information you supply. An on-site visit is usually needed before installation to confirm measurements, roof condition, shading, access and electrical requirements.
The installer will look at the direction, pitch and usable area of your roof. South-facing roofs are often favourable, but east- and west-facing arrays can still perform very well, particularly where electricity is used in the morning and evening. They will also check for shade from chimneys, trees, neighbouring buildings, dormers and roof-mounted equipment.
Inside the property, they will need to understand your consumer unit, meter position and likely cable route. For battery storage, an EV charger or a heat pump, the discussion may extend to how these technologies could work together. The aim is not to sell the largest possible system. It is to recommend a system that suits the property, your usage and your budget.
How to prepare for a solar survey
Start by making the areas the surveyor needs to see easy to access. This normally includes the loft hatch, the consumer unit or fuse box, the electricity meter, and the space where a battery may be installed if you are considering one. Move stored items only where needed and let the installer know in advance if access is difficult, such as a loft with restricted headroom or a meter in a locked communal cupboard.
There is no need to climb onto the roof or inspect electrical equipment yourself. That is the installer’s job. However, photographs can be helpful for a remote survey, especially clear images of the roof from ground level, the consumer unit, the electricity meter and any obstructions near the proposed battery location.
It also helps to think through access outside. Installers may need room for a van, ladders, scaffolding and the safe movement of panels. Narrow side passages, shared driveways, steep gardens and limited parking do not necessarily prevent an installation, but raising them early allows the quote to reflect the real work involved.
Have your energy information ready
Your electricity bills are one of the most useful things you can provide. Ideally, have 12 months of bills or smart-meter data available, as this shows seasonal changes in use. A household that uses more electricity in winter, for example, may have electric heating, while a home with high daytime use could benefit differently from solar than one that is empty from morning to evening.
If you do not have a full year of records, give an honest estimate of your typical monthly use and explain any upcoming changes. Perhaps you are buying an electric car, planning a loft conversion, working from home more often or replacing a gas boiler with a heat pump. These changes can affect the most appropriate system size and whether battery storage is worthwhile.
For a business, bring recent electricity statements and outline operating hours, machinery use and any planned expansion. A workshop with steady weekday demand has a different solar opportunity from a café with heavy weekend and evening consumption.
Know your priorities before the appointment
There is no single right reason to install solar. Some people want to lower bills as much as possible, while others value battery backup capability, charging an EV from solar generation or reducing reliance on grid electricity. Tell the surveyor what matters most to you.
Be clear about your budget too. A good installer can explain the trade-offs between a smaller panel-only system and a larger array with a battery. More equipment can increase the potential savings and flexibility, but it also raises the upfront cost. The right choice depends on your consumption pattern, roof capacity, tariff and plans for the property.
Questions are encouraged. You may want to ask how the predicted generation has been calculated, whether shading has been allowed for, what assumptions have been made about electricity prices, and what the proposed warranty covers. A clear answer is a useful sign that the proposal is based on your circumstances rather than a standard package.
Gather property details that could affect the design
Most homes will not need a stack of paperwork, but a few details can prevent delays. Tell the installer if the property is listed, in a conservation area, leasehold, newly built, or subject to covenants that may affect external alterations. Planning rules and permissions vary, so it is always better to raise potential restrictions at the survey stage.
If you own a flat or a commercial unit, establish who owns the roof and whether freeholder, landlord or management company consent is required. For commercial premises, roof warranties and structural information may also be relevant. The surveyor can advise on what is needed, but they cannot obtain a decision from another party on your behalf.
Mention any previous roof repairs, known leaks, asbestos concerns or plans to re-roof soon. Solar panels can be removed and reinstalled in some circumstances, but fitting an array immediately before major roofing work is usually poor value. A survey is the right time to discuss whether roof maintenance should happen first.
Make space for an honest roof and electrical assessment
It can be tempting to assume that every clear patch of roof should hold panels. In practice, safe fixing points, fire clearances, roof windows, ventilation outlets and access routes all influence the layout. A surveyor may recommend fewer panels than you expected, or suggest using more than one roof elevation. That is not automatically a compromise – it may be the most productive and practical arrangement.
The same applies to the consumer unit. Older electrics do not always rule out solar, but upgrades or additional protection may be required to meet current standards. Ask for these items to be shown separately in the quote, so you understand what is included and why.
If a battery is proposed, discuss its location openly. It needs a suitable, accessible area with appropriate clearances, not simply the nearest spare corner. Garages and utility spaces are common choices, but every property is different.
Prepare the people as well as the property
Make sure all decision-makers can join the survey or are available for a follow-up call. Solar is a long-term property investment, and it is easier to compare options when everyone has heard the same explanation about cost, generation and installation requirements.
If you are arranging quotes through Solar Planet, use the opportunity to compare like for like. Check the panel capacity, battery capacity, expected annual generation, assumptions behind estimated savings, workmanship warranty and whether the installer is MCS-accredited. The lowest figure is not always the best value if important electrical work, scaffolding or aftercare has been left out.
After the survey, take time to compare the proposal
A trustworthy proposal should be understandable without an engineering background. It should show what will be installed, where it is likely to go, what work is included and what may require confirmation. Predictions are estimates, not guarantees: weather, future electricity use and tariff changes will affect the result.
Before accepting, check that the system meets your priorities and that you are comfortable with the installation plan. If anything is unclear, ask. A reliable installer will be happy to explain the design, not rush you into a decision.
Preparing well does not mean becoming a solar expert before someone visits. It means giving the surveyor an accurate picture of your property and plans, so the recommendation has every chance of delivering the savings and reassurance you expect.
