Costa Solar GuideIndependent solar advice
Spain Independent Solar Quote Audit Service

Solar Quote Review Spain

Already have a solar quote? Get a free independent audit. We check equipment specifications, battery backup claims, legalisation status, and post-install tariff savings before you commit to a deposit.

Quick Answer

Already have a solar quote? Get a free independent audit. We check equipment specifications, battery backup claims, legalisation status, and post-install tariff savings before you commit to a deposit.

What we check

Costa Solar Guide provides a practical sanity check on solar panel quotations for property owners in Málaga and the Costa del Sol. We evaluate the key operational details of your quote:

  • Sizing suitability: Does the quoted kWp capacity align with your annual electricity consumption (kWh)?
  • Inverter capabilities: Is the inverter hybrid-ready (for future batteries) and correctly rated?
  • Battery specifications: Is the quoted storage capacity nominal or usable?
  • Paperwork and permits: Are municipal licenses, tax discounts, and industry registrations (boletín/CIE) explicitly handled?
  • Post-install savings: Have the import/export tariff settings been balanced for peak savings?

What we do not do

Our review is a practical sanity check based on experience, not a technical engineering design.

IMPORTANT NOTE: We do not perform structural roof surveys, issue formal legal declarations, or guarantee future utility savings. Our advice helps you identify missing elements and ask better questions before paying a deposit.

Common quote problems we identify

When auditing quotes, we frequently identify missing or misleading items, such as:

  • Quotes that fail to specify the exact brand and model of panels or inverters.
  • Vague assertions about battery backup capability that exclude the required gateway hardware and wiring costs.
  • Promises of Junta de Andalucía subsidies that fail to explain the current backlog or application criteria.
  • High-priced installations that do not include final registration with the regional industry delegation.

Why battery backup claims need checking

A battery will not keep your appliances running during a grid outage unless your system is configured with an automatic transfer switch or backup box. Many sales pitches gloss over this detail. If backup capability is important, the quote must list the backup box, critical load wiring, and specify which circuits (refrigerator, lights, internet) will remain active.

What happens during a power cut?

A battery alone does not guarantee backup.

Ordinary grid-connected solar

Stops supplying the home during a grid outage to prevent unsafe energisation of the grid.

  • Sunny weather does not change this
  • Adding a battery does not automatically add backup

A configured backup system

Can supply designated loads while safely isolated from the grid.

  • Compatible inverter and isolation equipment
  • Defined circuits, power and storage requirements
  • Limited runtime: charge, loads and generation matter

Ask the installer to specify supported loads, transfer time and expected runtime in writing.

Conceptual explanation, not a wiring diagram. Equipment and contract conditions vary.

Why legalisation and tariff audits are critical

Your panels must be legalised to qualify for export compensation and tax deductions. Ensure your quote details the final registration certificate (CIE). Furthermore, once the system goes live, switching to a competitive tariff with a virtual battery rolling credit can double your monthly savings compared to staying on a standard supplier plan.

Frequently Asked Questions

Is the solar quote review completely free?
Yes, our practical quote sanity check is completely free. Our goal is to protect Spanish property owners from predatory pricing and poor engineering decisions by offering independent advice. We receive no commissions from reviewed quotes, ensuring our assessment is unbiased. A sensible next step is uploading your quote PDF and a recent electricity bill through our secure portal.
What documents should I upload for review?
Please upload the complete PDF of your solar quotation and a recent monthly electricity bill. The bill is critical as it shows your hourly consumption patterns, current tariff, and contracted power capacity (potencia), which are necessary to check if the proposed system is sized correctly. A practical next step is obtaining your digital bill PDF from your supplier's online account.
Do you recommend alternative installers?
Yes, if we identify significant issues with your quote (such as excessive pricing, low-quality mounting hardware, or incorrect battery sizing), we can introduce you to vetted local installers who offer transparent, competitive terms. We only recommend companies that have verified registration status, use their own in-house teams, and handle the legalisation paperwork. A practical next step is requesting alternative introductions after your audit.
What is a realistic payback period for solar in Málaga?
A realistic payback period in Málaga depends on your self-consumption ratio, quote price and any municipal tax relief you can actually verify. Payback is never guaranteed and will be longer if you install an oversized system or a physical battery that you do not fully utilise.Verify local IBI and ICIO incentives
Why is it important to check the panel and inverter model?
Checking the exact manufacturer and model is critical because low-cost quotes often use generic or outdated hardware that lacks long-term warranty support. A quality inverter must be hybrid-ready if you plan to add a battery later, and panels should have a low temperature coefficient to handle inland Málaga's intense summer heat. Ensure your quote lists specific models rather than vague descriptions. We recommend verifying equipment datasheets before paying a deposit.
How do I verify if a solar installer is registered in Spain?
You can verify an installer by requesting their official registration number (número de instalador autorizado) issued by the regional industry delegation. Registered installers hold public liability insurance and are legally authorised to sign the Certificate of Electrical Installation (CIE), which is mandatory to legalise your system. If the installer is not registered, you cannot activate export compensation. A practical next step is checking their details in the regional industry register.
Will my solar panels work during blackouts?
No, standard solar installations automatically shut down during power cuts to prevent feeding electricity into the grid, which could endanger utility workers. Running appliances during a blackout requires a hybrid inverter, a battery, and a specific automatic transfer switch or backup box. If backup capability is important, verify that these specific hardware items are itemised in your quote.