PV quotation after a roof design change: Confirm the new basis together

Your customer has received a PV quotation and subsequently sends a new roof drawing. A window has moved, a dormer has been added or a previously considered area is now planned differently. They want to know whether they can continue deciding on your previous offer. A specific clarification task arises for your specialist business: what actually changed, which basis is confirmed and which parts of the proposed installation need review before another commitment? An understandable comparison helps connect the customer’s roof decision with their PV project.

Start with the changed roof basis and its associated installation design. An unchanged building description does not mean the planned module arrangement still fits. Equally, not every new drawing automatically requires an entirely different installation. Your specialist team assesses the affected relationship. Sales then makes clear what is confirmed, which item changes and which decision remains open. The previous design stays available as a traceable earlier position.

Separate the actual roof change from the new filename

Ask the customer to identify the difference from the previous basis specifically. A later drawing date may concern a completely different part of the building. Ask about the areas, openings or structures actually changed for the PV project. Compare the available documents using the same view. Your team should recognise whether the new position affects the area for which the previously offered installation was planned.

Clarify whether the drawing describes confirmed planning or merely a proposal. Two possible dormer shapes might be under comparison without either being chosen. Treat both as possible roof bases with their respective status. An open building idea does not become the binding PV planning basis simply because it arrived most recently. The customer should understand what confirmation your business actually needs for further development.

Also identify the author and contact for the change. Who can explain an unclear dimension reference or a discrepancy between two views? The customer need not personally answer every planning question. They can name the intended contact for the specific clarification. A well-assigned query is more helpful than a blanket request for new roof documents without identifying which relationship remains unclear.

Clearly identify the previous PV design

Place alongside it the design your quotation actually uses. Which roof view, considered areas and preparation stage belonged to it? An older presentation image may differ from the module arrangement finally costed. Use the correct link between planning and quotation. Otherwise, you compare the new roof basis with a PV image that never showed the scope offered for decision.

Keep existing alternatives distinct too. There may have been one option only on the main area and another including a secondary area. The roof change may affect them differently. Your team therefore checks the option actually being pursued and marks how other proposals are treated. The customer should not find a technically outdated alternative beside an updated version as equally confirmed choices.

Ask which decision the review should prepare. Does the customer initially want to understand the effect of a possible roof change, or is the new roof design settled? In the first case, a limited preliminary review can explain the open decision. The second concerns the new basis actually needed for the quotation. Name both assignments clearly so that a still-conditional comparison is not read as a finished delivery commitment.

Have the module layout assessed on the new basis

Send the confirmed roof change and previous design to the responsible specialist planners. They assess which usable areas change and how the offered arrangement fits. A relocated window may raise a different question from an additional dormer. Sales does not derive its own clearance rule or calculated replacement layout. The professionally checked illustration forms the basis of the subsequent customer explanation.

Current SMA documentation on visual module planning considers different roof areas, dormers and shading from obstacles. This supports the fact that roof geometry and its surroundings can form part of a specific planning route. It confirms no particular layout for this building. Use the information as a professional reference for review. An illustration with freely moved rectangles is not a finished design of the system you offer.

Ask for the actually affected difference to be identified in the result. If a module area remains after review, confirm precisely that. If it is rearranged or a previously considered area is removed, the new illustration shows the change. The customer can assess the proposed installation on the changed roof basis without guessing which part of the previous design changed from a new overall number.

Include the electrical relationship in the review

When the intended layout changes, the responsible electrical planners receive the same new position. They assess the affected system configuration and associated components. An unchanged inverter designation does not answer that review. Sales explains only the confirmed result. It promises neither that all components can stay unchanged nor that replacement is necessary solely because a new roof drawing exists.

Continue to include existing system wishes. The customer may retain their storage or wallbox preference while the roof basis changes. Ask whether these wishes still apply and have their connection to the new configuration reviewed. Earlier wishes remain visible. They are neither removed without conversation nor carried into the new version as a technically unchanged combination without checking.

Distinguish a confirmed component choice from an outstanding query. The team might already illustrate the changed module area while an associated design assessment remains underway. Mark precisely that difference. The customer can discuss a view without it already counting as a fully confirmed overall offer. Assign the next professional answer needed to the affected planning component.

Coordinate roof work and PV work

Ask what work under the new roof design other participants are already preparing. A dormer or roof window is a separate building-element relationship; your PV quotation describes its actual intended contribution. Clarify who confirms the execution details needed by your planners. A general agreement that everyone works on the same site does not establish which position should underpin later installation.

Consider the sequence of affected work. The customer should know which confirmed basis your business needs before specific preparation. A planning decision may first be necessary before the PV configuration can be finally assessed. Describe that dependency precisely. Invent neither a blanket execution date nor automatic cooperation by another business not yet involved in that coordination.

If something relevant changes between drawing and actual execution, send the information back to the responsible planners. The reference remains the same specific roof area. An agreed information route explains who reports the difference and which specialist assesses it. Sales need not anticipate a construction inspection, but can ensure a known change is not left disconnected beside an old installation image still being used.

Compare the complete offered services

Have the supply and work items resulting from the review reassigned. A changed layout may create different offered items; your business’s actual costing is decisive. The number of removed modules implies no universal reduction amount. The customer needs the explained change to the complete package, including which offered work remains and which confirmed scope is newly described.

Show unchanged parts where this helps the comparison. Otherwise, a customer might infer an entirely different service from a new overall price. Associate the changed amount with the actual revised version and explain the main differences. The old costing remains identifiable as history. You need not rewrite it retrospectively as though the new roof design had already existed when it was prepared.

If an earlier calculation used the old system configuration, have its affected reference checked too. Do not transfer a previous yield statement to the new version solely because the building is the same. The responsible specialist assesses the necessary update. This guide states no yield figures or economic advantage. The customer receives the actually reviewed scope and a clear explanation of any additional assessment still needed.

Relate the decision to a specific version

Bring together the roof basis, PV illustration and quotation version understandably. The customer should recognise which document belongs to which position. A new drawing beside an old price sheet can otherwise look like a common current package. Identify the version now being discussed and which earlier option it is intended to replace. Actual commissioning is clarified separately using the correct documents.

Ask the customer to describe the offered difference in their own words. Which roof decision is included and which installation is proposed for it? If the connection is missing, add the specific explanation. This is particularly useful when they coordinate several roof and PV businesses in parallel. An understandable comparison preserves their design preference and shows which contribution actually comes from your business.

If the roof decision remains open, describe the next confirmation needed. Who clarifies which building-element position, and what PV question can then proceed? The documents gain a useful next purpose. Your team need not keep treating several unconfirmed designs as finished ordering options. The customer knows which decision advances their own planning and when the specific quotation review resumes.

Follow a fictional roof change through to the new version

An explicitly fictional customer has received a PV offer on a main roof area. They then want to consider an additional roof window. Sales records the wish and first clarifies whether its position is settled. While that is open, no new complete offer is issued as a confirmed option. The responsible planners identify the roof basis needed and the intended next review step.

After confirmation, planners receive the new drawing together with the previous PV version. They assess the affected layout and associated system configuration. The result can be shown to the customer as a specific difference. Actual supply and service items are costed accordingly. Neither an unchanged module arrangement nor a particular price benefit is asserted merely because of the new window.

In the final discussion, the customer points to the same roof drawing used by the new PV illustration. They recognise the incorporated difference and know which version is now pursued. An old alternative remains as earlier history. During the internal rehearsal, a colleague can explain the same connection without guessing from attachment dates which offer belongs to the new roof design.

Gain new PV projects for your advice

Photovoltaic leads from webRichtung connect you with people in Germany requesting an installation including planning and fitting. Building type, system preference, planning stage, location and contact open the conversation. Roof dimensions and changed drawings are not promised enquiry details. Clarify these bases personally. Register your specialist business and prepare your order in webRichtung Customer; the current price is shown before a binding order.

Sources

SMA documentation on PV module layout supports the limited connection between roof areas, obstacles and module planning. The webRichtung photovoltaic page describes the actual enquiry service. Both read on 25 October 2026. Quotation coordination is an editorial recommendation; structural and electrical assessments remain with the responsible specialists.