What's included
- Technical review of the quote another company sent you
- Verification of proposed panel model against manufacturer catalogue (Tier-1 vs Tier-2)
- Verification of proposed inverter against official spec sheets
- Analysis of written warranties (years of product, years of yield, labour)
- €/kWp price comparison vs current market ranges in Málaga province
- Detection of non-obvious optional charges (legalisation, monitoring, batteries included/not)
- Written report with green/yellow/red lights, no opinion on who to hire
How we work
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You send the quote · 5 min
By email or WhatsApp you send us the quote you received (PDF usually). If you have 2 or 3 different quotes, even better — we compare them in parallel.
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Technical review · 48-72h
In 48-72h we review component by component: brand/model of each device, written warranties, scope of legalisation, price per kWp, exclusions.
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Explanation call · 30-45 min
We call you 30-45 min to explain the report. You speak with a technician, not commercial. Resolve questions live.
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Written report · Same day
We email you the report with green/yellow/red lights table, marking what to verify before signing.
Frequently asked questions
How much do you charge for the advice?
Flat rate of €80 per quote reviewed (or €150 for two quotes compared, €200 for three). If afterwards you decide to hire us for the installation, we deduct those €80-200 from the quote. If you don't hire us, no problem — it's our honest acquisition model.
Why does an installer give second opinion on the competition?
Because pre-revenue as we are, earning your trust is worth more than winning your next installation. If we review 100 quotes a year and 20 end up hiring us because we did good review work, we have a business. If we reviewed to sabotage competition, you'd take 5 minutes to notice and you'd spread the word.
What if your report says the other company's quote is fair and good?
We tell you so, undisguised. It means your company did good work and you should sign with them. Our credibility as advisors depends on the report being reliable both when saying green lights AND when saying red lights.
What things typically appear as yellow or red flags?
Most common: panels of little-known brand sold as Tier-1 without being on BNEF list, cheap inverter without clear warranty, labour with coverage below legal minimum (RDL 1/2007 sets 2 years), legalisation not included in price, battery included but without specified brand/capacity, price per kWp clearly deviated from market range without technical justification.
Do I need to give you personal data or about my home?
No. For technical review we only need the quote itself. If you also want opinion on sizing (3 kWp vs 5 kWp for your case), tell us your approximate annual kWh consumption, but no personal identifiable data.
What if my quote isn't from Málaga but from another province?
We review it the same — the technical part (components, warranties) is national. The €/kWp price comparison is local Málaga market, so for other provinces the reference range may vary. We warn you in the report.
This service exists for a concrete reason: a residential photovoltaic installation moves a lot of money (typically between 4500 € and 12000 € per updated 2026 prices) and most owners don’t have tools to evaluate whether the quote a company just sent them is fair, inflated, or omitting key information. There are 4 or 5 technical details that move the result a lot which a competent salesperson can hide in fine print without it showing.
What this service does NOT do
We don’t tell you which company to hire. We don’t criticise specific competitors. We don’t negotiate price on your behalf. We just give you the technical tools so you make an informed decision. Your final installer can be anyone — even us if along the way we convince you, but that’s not the reason for the service.
The 5 things we review
1. Panel brand and model
Is the specific model on the Bloomberg New Energy Finance Tier-1 list? If not, it doesn’t mean the panel is bad — it means the manufacturer isn’t financially validated to honour long warranties. There are Tier-2 panels that work well and there are Tier-1 panels with known issues. We tell you.
2. Inverter brand and model
The inverter is the component most likely to fail during the system lifetime (typically around 10 years, vs the panel’s much longer lifespan). We verify model against spec sheet, written warranty and spare parts availability in Spain.
3. Real warranties in the contract
What exactly is warranted? How many years of product vs years of yield? What does labour cover? The legal minimum per RDL 1/2007 is 2 years, but some contracts illegally limit it to shorter periods. Who pays the technician’s travel if there’s an incident in year 7?
4. Scope of legalisation
The price should include technical report + CIE + self-consumption registration with industry + connection with E-Distribución. If legalisation appears as “extra” or “you handle it”, the quote is incomplete. Equivalent to buying a car without licence plate.
5. €/kWp price vs market
We compare the €/kWp of the quote against current Málaga market ranges. Deviations of 15 % above can be justified (premium components, complex installation). More than 25 % above without clear technical justification, red flag. Below the range, also yellow flag — they may be cutting components.
When asking for this advice makes sense
Makes sense if you’re in any of these cases:
- You’ve received only one quote and have nothing to compare with.
- You’ve received two or three quotes that differ a lot in price.
- The salesperson rushes you to sign (“offer only until Friday”, “one discounted kit left”).
- The quote includes concepts you don’t understand (optimisers, smart meter, premium monitoring, turnkey kits vs loose components).
- You’re going to invest more than expected and want to validate before committing.
It does NOT make sense if your quote is from an installer you’ve worked with before, you know exactly which components they are and have checked the price. In that case, save the 80 € and sign.
And afterwards
If our review confirms your quote is fine, perfect — sign with that company knowing you’ve done the technical homework. If the review brings up things to correct, you go back to the company with concrete questions and see how they respond. If you’re interested in also exploring our turnkey installation option, we give you our own quote with the advice discount applied. If you’ll later need annual maintenance, we include the visit plan in the proposal.
Ready? Send us your quote via contact and we get to work.