To compare solar quotes in Mallorca, line up three quotes for the same system and check each one for the same twelve items: equipment named by model, the mounting system, the inverter type, warranties, legalisation, the grant application, IVA and payment terms. The lowest total is only a good deal if it covers the same work as the others. Our quote checker does the price part in a minute; this guide covers the rest.
Why three
Quotes for the same Mallorca roof routinely differ by 20 to 30%. Installers price access, scaffolding, equipment tiers and paperwork differently, and some leave items out that appear later as extras. One quote tells you nothing; two leave you guessing which is off; three show you the middle and the outlier. Each installer also notices different things on the roof.
What a good quote includes
1. Equipment by model. Panel brand, model and wattage; inverter brand, model and power; battery brand, model, usable kWh. "Tier 1 panels" and "European inverter" are not specifications.
2. System size. kWp of panels, and a production estimate for your roof, ideally from PVGIS for your orientation and pitch. Treat a production figure above about 1,650 kWh per kWp a year with suspicion unless the roof is perfect.
3. Mounting. Tile hooks and rails for a pitched roof; tilted frames or ballast for a flat roof; how the roof is penetrated and sealed, and who is liable for leaks.
4. Electrical. DC and AC protections, surge protection, earthing, cabling route, and whether the switchboard needs work. Single or three-phase inverter to match your supply.
5. Legalisation. Memoria técnica or project, electrical certificate (CIE), registration in the Balearic self-consumption register, the comunicació prèvia or licence at the town hall, and the change of supply contract. Fees itemised.
6. Grants. Who files the FACTOR application and prepares the IBI/ICIO paperwork, and whether that's in the price. A grant should be described as "applied for", never "guaranteed".
7. Monitoring. An app, and whether it shows consumption as well as production (that needs a meter clamp).
8. Warranties. Panel product warranty (12 to 25 years) and performance warranty (25 to 30 years); inverter (5 to 12 years); battery (10 years or cycles); and the installer's own workmanship warranty, in writing, with the company's registration number.
9. Timeline. Start date, days on site, when the system is commissioned, when the paperwork is filed.
10. Price and IVA. Total with 21% IVA shown. Extras listed with prices, not "to be confirmed".
11. Payment terms. A deposit of 20 to 30% on signing, the balance on commissioning, is normal. Avoid paying most of the price before the installation. Never pay cash: it disqualifies the tax deductions.
12. The company. Legal name, NIF, address, installer registration number, insurance. A quote from a brand name with no company behind it is a red flag.
Comparing prices
Divide the solar part by the kWp and the battery part by the kWh. For 2026 in Mallorca, expect about €1,200 to €1,600 per kWp for a 5 kWp system with IVA (less per kWp as systems grow) and €480 to €700 per kWh of battery. Premium equipment, flat roofs, three-phase and difficult access justify the top of the range; a simple south-facing tiled roof should sit near the bottom. The solar panel cost guide has the full table.
What's commonly missing
- Legalisation and registration ("the paperwork is on you").
- The mounting structure on flat roofs.
- Scaffolding or a lift for tall houses.
- Switchboard upgrades.
- The meter clamp for consumption monitoring.
- Removal of an old system.
- IVA.
A price well below the others usually means one of these is missing.
Red flags
- No model names, or brands you can't find.
- "Guaranteed" grants, or a grant quoted for a non-resident who can't claim it.
- Production figures that don't match the orientation.
- A workmanship warranty that isn't in writing.
- Pressure to sign today for a price that "expires".
- Cash discounts.
- A company with no registration number or address.
Questions that sort installers
- Which exact models, and why those?
- How will you fix to my roof and seal it?
- Is my supply single or three-phase, and does my switchboard need work?
- Who files the town hall paperwork and the register entry, and is that in the price?
- Who applies for FACTOR, and when?
- What happens if production is lower than your estimate?
- Can I see two recent installations nearby and speak to the owners?
- What's your workmanship warranty, in writing?
Equipment tiers, briefly
For most Mallorca roofs an established mid-range panel brand is the value choice; premium panels earn their price only when the roof is small or the product warranty is meaningfully longer. String inverters suit unshaded roofs; micro-inverters or optimisers rescue partly shaded ones at 10% more. Hybrid inverters make sense if a battery is planned within a few years.
After you choose
Get the final quote as a contract with the twelve items above, the timeline and the payment schedule. Keep every invoice and certificate: you'll need them for the grant, the tax deduction and the IBI rebate. If you later want a second opinion on a quote in hand, the quote checker and two more quotes from the request form form are free.
Common questions
Should I always take the cheapest quote?
No. Compare what's included first: equipment, warranties, legalisation, structure, IVA. The cheapest complete quote is a good choice; the cheapest incomplete one isn't.
How many quotes should I get?
Three. Two leave you guessing which one is off; more than three wastes everyone's time.