Cost: solar water heating and solar thermal
Include collectors, mounts, storage, insulated pipes, controls, backup, protection and installation. Compare systems providing the same service. No average price, standard tank size or universal solar coverage is established.
Editorial update on 18 September 2026
Compare the complete system
Separate collectors and mounts, tank and exchangers, lines, hydraulic group, controls, protection, installation and tests. Check reuse of existing backup and included adaptations.
Identify building costs
Itemise roof access, lifting, penetrations, reinstatement, tank space and access. A larger tank or more collectors do not replace assessment of use and absences.
Compare useful heat and running cost
Request delivered heat, backup demand, electrical auxiliaries, losses and service assumptions. Compare another suitable hot-water system on equal demand. Separate confirmed support and justified VAT; French grants mentioned on a manufacturer page do not apply automatically in Luxembourg.
The three budget levels
Where your money goes
- CollectionOn quotationCollectors and mounts.
- StorageOn quotationTank, exchangers and backup.
- ConnectionsOn quotationHydraulics, insulation and controls.
- WorksOn quotationAccess, installation, tests and follow-up.
What makes the price vary
Usage
Demand and absences.
Roof
Shade, orientation and access.
Existing system
Reusable tank and heater.
Scope
Hot water alone or heating too.
Indicative scenarios
No grant is deducted from the budget shown here. If a quote mentions support, request the exact scheme and confirmation of your eligibility before including it in financing.
Frequently asked questions
Will solar provide all hot water?
Estimate coverage and backup for your profile. One percentage for all households is unjustified.
Are evacuated tubes always preferable?
Compare system performance on site, maintenance and cost, not collector type alone.
Can the old tank stay?
Only after checking compatibility, exchangers, capacity and control.
Do more collectors mean greater savings?
Not necessarily. Assess heat actually used and operation during periods without demand.
Your exact price, in 2 minutes
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