Cyprus Solar Shading: Ask for a Site-Specific Assessment

Ask what the shading assessment actually includes

Request a solar proposal that identifies nearby obstacles, explains how their shadows are assessed and preserves the inputs behind the offered layout. A town-level generation estimate does not establish that every part of your roof receives the same sunlight. Ask which roof conditions have been surveyed, which have been modelled and which remain assumptions before comparing projected output.

For a home in Limassol, surrounding buildings, rooftop equipment and the available mounting area should be treated as site information rather than guessed from a generic Cyprus sunshine statement. This is a homeowner's enquiry guide. It does not calculate electrical string arrangements, prescribe roof access or guarantee a production figure for the proposed installation.

Record the site constraints

Prepare an enquiry describing the roof and known obstacles from information available safely. Note water tanks, existing equipment and adjacent structures that may affect the layout. Include known planned changes, such as an approved extension or equipment relocation, without assuming they will happen on a particular date. The installer should explain what further survey is necessary.

Photographs taken from ground level or another safe accessible position can help identify questions. Record when and where they were taken and which roof area they show. Do not climb onto a roof to gather this information without an appropriate professional arrangement. A photograph is an observation at a particular moment, not a complete assessment of shade throughout the year.

Ask whether the survey records obstacle position and height relative to the proposed array. A parapet near a module and a distant ridge create different modelling questions. The installer should explain how the method represents each relevant obstruction and whether parts of the array experience different shade. Do not infer those details from a map pin or an aerial image alone.

Use a proposed obstacle register with four fields: obstacle identity, affected roof area, assessment method and unresolved assumption. This is an editorial enquiry structure. It makes it possible to ask why a feature visible in a photograph is absent from a model, or why a conservative allowance was used when the position could not be confirmed.

Read the model limits

The European Commission's PVGIS user manual describes a choice between using no horizon information, using the built-in calculated horizon and uploading a user horizon file. It explains the horizon function in relation to shadows from hills or mountains. A selected horizon option is therefore information about the model, not evidence that rooftop obstacles and neighbouring structures have been surveyed correctly.

Ask the installer what the actual proposal uses and what additional site-shading method is applied. Do not assume the default terrain horizon represents every nearby tank or wall. If a custom horizon or another model is provided, request the source, date and explanation of its limits. You need to understand the information behind the output, rather than only seeing a coloured chart.

Preserve the input set with the proposal. Record the model or tool version, location, proposed capacity, orientation, tilt and assumed losses where those are relevant to the calculation. The meaning of a loss value should be explained: it may combine several effects rather than isolate measured shading. A changed input can alter the estimate without any change in the physical equipment offered.

Keep units clear when discussing results. The JRC hourly-data documentation distinguishes modelled PV power, reported in watts, from other radiation and weather quantities. A power value at a modelled time is not itself the energy generated over a period. Ask the installer to explain how the reported series is converted or aggregated for the proposal and what assumptions that process introduces.

A hypothetical constant output of 2 kW over 3 hours corresponds to 6 kWh. Those invented values illustrate the distinction between power and energy; they are not a Cyprus roof prediction. Real output varies, and an assessment must account for the relevant time series rather than treating an isolated power value as a daily result.

Connect assessment to layout

Ask why the proposed panel positions were selected. The answer should address usable roof area, access, retained equipment and the shade assessment. A larger named capacity can involve modules in less favourable positions. Compare the model for the offered layout rather than assuming that capacity alone establishes higher usable production for the household.

Request a clear drawing that identifies the arrangement assessed. If the quotation later moves modules or changes their orientation, ask whether the generation and shading assessment has been updated. A model for an earlier layout should not silently become the supporting evidence for a different installation. Keep revisions tied to the proposal you are considering.

Where the installer proposes module-level electronics or another product response to shading, request a site-specific explanation. Ask which constraint the device addresses, what compatibility evidence applies and what residual loss remains in the estimate. A product category is not a promise to remove all shading effects, and the homeowner should not be expected to design the electrical arrangement.

Consider maintenance alongside the layout. Ask how the installer preserves appropriate access to both the solar equipment and retained roof services. The relevant professionals should assess roof safety, structure and equipment access. This article does not offer clearance dimensions or mounting instructions; it prompts the project team to explain the arrangement they propose.

Compare proposals on a shared basis

Give competing installers the same known site information and ask each to identify additional findings. Compare what was surveyed, the layout modelled and the uncertainties stated. A precise-looking output with undocumented assumptions is harder to assess than an estimate whose limitations are visible.

Separate production from household use and billing. A shading assessment concerns generation at the proposed array; it does not establish how much electricity will be used immediately or what export arrangements apply. Ask for the consumption and connection assumptions in the overall offer. Do not convert modelled output directly into guaranteed bill savings.

Before signing, list any unresolved site question and who will answer it. If the model is provisional pending a survey, establish what happens when the survey changes the proposal. Record whether a revised layout, price or output estimate needs your approval. The decision should be made on the actual system and conditions, not on a preliminary chart that has become detached from the final quote.

Common questions

Is a midday photograph sufficient?

It documents only the conditions visible at that time. Ask how the installer evaluates seasonal and daily changes and which observations or modelling support that assessment. The photograph can guide the enquiry without substituting for the survey.

Does PVGIS certify the roof as unshaded?

PVGIS is a modelling resource with stated inputs and horizon options. It is not a site certificate. The installer should explain what the model represents and how nearby obstacles relevant to the array were assessed separately where needed.

Will an optimiser remove the shading problem?

Ask for the product-specific and layout-specific explanation, including remaining effects and compatibility. Avoid interpreting an accessory name as proof that every module will generate as though there were no obstacle.

Should a changed panel layout require a changed model?

Request confirmation that the estimate corresponds to the layout being offered. If inputs or positions have changed, keep the updated assessment and the reason for the revision with the quotation. That link is essential for a useful comparison.