Decision framework
A verifiable decision, not an isolated estimate
Before comparing solutions, clarify the project assumptions, their sources and dates, and the responsibilities involved. Use your bill, roof plan and written responses to check that each quote covers the same needs.
Start with a measurable question
Start your solar decision with building data. Record the address, building type, relevant area, energy use and desired result. When assessing solar subsidies and the calendar of procedures in the canton of Jura, distinguish readings, written confirmations and assumptions. Compare gross and net amounts for the same scope; separate installed capacity from annual generation. Check grant conditions before deducting support from the budget. Prepare open questions for the installer, municipality, grid operator and insurer, identifying the record or measurement needed to answer each one.
Turn your bills into scenarios
Gather twelve months of bills if possible. Separate energy, network use, metering, taxes, levies and optional services. Include heating, hot water, EV charging and absences. An annual average can hide demand concentrated in mornings, evenings or winter. Compare conservative, central and favourable scenarios for an owner who wants to budget only for aid that is actually confirmed. Keep units, scope and tariff dates consistent so that differences reflect the options being compared.
Check the roof and surroundings
Orientation, slope, chimneys, dormers, trees, antennas, snow, access, ventilation and neighbouring buildings affect solar generation. Ask for an aerial image, a dimensioned roof plan and a seasonal shading assessment. Have the roof covering, possible asbestos, structural capacity and cable routes assessed before committing to system capacity. A simulation for solar subsidies and the calendar of procedures in the canton of Jura should explain losses, show monthly generation and account for roof renovation or expansion before installation.
Compare quotes for the same scope
Three quotes are comparable only when they cover the same scope. Ask for the brand and exact model of each module, inverter, battery, protective device and mounting system. List scaffolding, distribution-board upgrades, grid connection, metering, applications, monitoring, maintenance, VAT and options separately. A lower price may exclude a service; a higher price may include a structural assessment or broader service terms. Identify who coordinates with the DSO and provides commissioning documents.
Check warranties and responsibilities
Product, performance and installation warranties, and insurance, cover different matters. Check duration, exclusions, beneficiary, claims procedure, response times and service arrangements if a manufacturer changes distributor. Keep invoices, serial numbers, photos, certificates, diagrams and handover records. The owner should retain access to the file documenting the dated Pronovo, cantonal and municipal conditions, quote and submitted documents, even if the installer or project manager changes. Identify who addresses sizing errors, water ingress, communication faults or substantial differences between simulated and measured generation.
Compare the full cost
Include purchase, installation, applications, maintenance, remaining grid purchases, inverter replacement, possible roof work and surplus revenue. For a battery, consider usable capacity, losses, cycles, backup reserve, temperature, software and replacement. For a contract, check subscriptions, price changes, credit validity and exit terms. For a grant, consider eligibility and payment timing. Test whether the decision remains affordable if feed-in tariffs fall, consumption changes or the project is delayed.
Prepare for commissioning and handover
Before work starts, request a list of tests and documents to be provided. These may include insulation measurements, protective-device checks, grid settings, backup settings, connector checks, circuit labels, monitoring access and meter readings. An app displaying data does not replace a complete technical handover. Ask for safe shutdown instructions, a service contact and the circuit diagram. A dated handover record supports warranty claims and comparisons between expected and measured generation, bills and consumption.
Plan for future electricity use
A heat pump, water heater, EV, home working, extension, tenant change or renovation can alter a home’s electricity use. Include planned changes in the simulation. Check whether the inverter, distribution board, communications, available space and grid connection allow realistic expansion. An open system can be more useful than a larger system with limited compatibility. For an owner who wants to budget only for aid that is actually confirmed, assess how to avoid a second costly installation when needs change.
Keep the evidence organised
Keep annotated bills, plans, simulations, compared quotes, grant conditions, official applications, before-and-after photos, certificates, warranties and generation records in one file. Date each item because tariffs and programmes change. An undated screenshot cannot establish a contractual condition. Record the amount stated, the condition that applied and the person responsible. These records support budget checks, a future sale and discussions with the DSO, insurer or authorities.
Check the quote before signing
Before signing, check the description, address, owner, capacity, models, generation estimate, exclusions, prices, VAT, grants, schedule, handover, warranties and termination. Gather the relevant records: the dated Pronovo, cantonal and municipal conditions, quote and submitted documents. Request written answers to unclear points and identify who will resolve them. Keep the final quote, data sheets and contract terms together. A promised saving or equipment brand cannot replace the scope of work, calculation assumptions and service arrangements.
Mapping the Jura authorities
In the Jura, start with the exact address, the municipality, the type of building and the planned measure. Separate Pronovo federal aid, cantonal program, municipal contribution, tax deduction and possible support linked to a renovation. Each agency may use a different definition of power, filing date, commissioning, owner, or eligible cost. Note the name of the official page, its date of consultation, the form, the document requested and the person responsible. Do not turn an example published the previous year into an earned amount. A map of authorities reduces duplication and shows where to request written confirmation before signing.
Order the calendar
Establish a timeline with roof study, estimate, prior request, authorization, order, work, electrical inspection, commissioning, Pronovo request, validation and payment. Mark the steps that must precede the work and those that can only be removed after installation. Add the deadlines for co-ownership, heritage, connection and correction of an incomplete file. The person responsible for each action must be indicated: owner, installer, municipality, canton, Pronovo or network manager. A date without a manager is not a schedule. Keep a PDF or printed version of the conditions that were used for the budget and report any changes immediately.
Check eligibility without promise
Compare the project with the power, technology, building, renovation, owner and exclusions of the applicable regulation. Check if battery, roof, insulation, demolition, extension or installation on a protected building are treated separately. Ask if an invoice, photo, certificate, permit, commissioning certificate or proof of payment is required. The net amount must show gross cost, VAT, assumed aid, confirmed aid and remaining risk. When the organization responds orally, note the date, name, file number and reformulate the response in writing. The installer can help prepare, but the authority decides.
Prepare a file that survives questions
Gather identity, address, cadastral extract if necessary, dimensioned plan, photos, power, diagram, detailed quote, component references, network coordinates, authorization, proof of deposit, final invoice and report. Do not send a partial capture that hides the date or address. Name the files with version and date, then keep acknowledgment of receipt and request for additional information. A closing checklist should compare what was planned with what was delivered: modules, inverter, meter, production, price and support. This discipline simplifies a future sale, a tax request or an inspection and avoids counting aid already used.
Respond to a request for additional information
If a department asks for clarification, respond in the same file with a short letter, the project reference, the copied question and the document that answers it. Do not silently replace a quote with a new version: indicate modification, date, difference in amount and effect on eligibility. For co-ownership, attach minutes, decision and distribution. For an old building, explain roofing, renovation, protection and authorization. For an installation already in service, link final invoice, inspection certificate, meter and start-up date. A readable file helps the administration decide and allows you to prove what was actually transmitted.
Trace help that changes
When an official page is modified, archive the old version in your file indicating what has changed: amount, minimum power, deadline, form, budget or accumulation rule. Compare the text with your acknowledgment, as a new condition should not be confused with an original request. If a municipality finances a study but not the installation, separate the two items. If a program requires a renovated building, attach corresponding proof rather than a promise of work. Ask for a case number, contact person and confirmation of the remaining steps. A precise chronology also facilitates taxation, a dispute, a change of installer or a sale before payment.
Before dropping off in Jura
Reread the file as a person who does not know your house would do. The address must match the invoice, plan, form and bank account. The power, number of modules, inverter type, order date and commissioning date must remain consistent. Attach the useful pages of the quote, not just the first sales page. Check signature, power of attorney, file format, attachment size, possible translation and method of sending. Ask the municipality if heritage, agricultural zone, visible roof or protected building requires an additional step. Before the work, get a clear answer on the authorized order. After the work, keep certificate, invoice, photos, meter and acknowledgment of receipt in the same file so that the Jura amount remains verifiable.
A margin for unforeseen events
Add to the budget the time for a follow-up, the correction of a part, a new photo, a roof inspection or a connection delay. Do not initiate an irreversible order because a portal displays an envelope remaining: a program may close, cap, or apply a different date. Ask what expense is eligible if the quote changes after deposit and if an extension, battery or renovation must be declared separately. The final file must make it possible to link each franc to an invoice, a condition and a step. This method margin is often better than an optimistic estimate and protects the decision when weather, installer availability or municipal calendar changes.
Use this section with your invoice, roof plan and quotes. The final decision must remain linked to the official conditions, the actual connection and the written contract.
