If you are collecting solar quotations on the Costa Blanca, the most important step is not choosing the cheapest price. It is making sure each quote is for the same job, with the same equipment, the same level of protection, and the same aftercare. The right questions to ask before a solar quote will help you compare proposals properly and avoid surprises later.
Use the checklist below to understand what is included, what is optional, and what may need confirming for your property in Jávea, Moraira, Dénia, Calpe, Altea, Benissa or nearby areas. You may also find our Solar Panel Installation for Villas on the Costa Blanca useful.
Why these questions matter
Solar quotations can look similar at first glance, but the details often differ. One installer may include monitoring, cable runs and paperwork, while another may only quote for the panels and inverter. Battery proposals can also vary a lot in usable capacity, backup function and warranty terms. You may also find our Solar Panels in Costa Blanca North useful.
On the Costa Blanca, where many homes are villas, second homes or properties with variable occupancy, it is especially important to understand how the system will perform when you are away, how it will behave during outages, and what support you can expect after installation.
Questions to ask before solar quote requests
1) What exactly is included in the quote?
Ask for a clear list of everything covered. A useful quote should explain whether it includes: You may also find our What to Ask Before Getting a Solar Quote useful.
- solar panels
- inverter or hybrid inverter
- battery storage, if applicable
- mounting system and roof fixings
- cabling and electrical protections
- monitoring equipment or app access
- installation labour
- commissioning and handover
- paperwork and registrations, where applicable
If any item is excluded, ask for it to be listed separately. This makes comparison much easier.
2) Is the system designed for my actual property and usage?
A proper proposal should be based on your home, not a generic package. Ask what information was used to size the system, such as:
- your annual or monthly electricity use
- daytime versus evening consumption
- whether the property is occupied year-round or seasonally
- roof size, orientation and shading
- whether you plan to add a battery now or later
- whether you have a pool, air conditioning, underfloor heating or other heavier loads
For second homes on the Costa Blanca, usage patterns can be very different from permanent residences, so system design matters.
3) Which solar panels and inverter are being proposed?
It is reasonable to ask for the make and model of the main equipment. You do not need to become a technical expert, but you should know what is being installed and why.
Ask about:
- panel manufacturer and model
- inverter type and brand
- whether the inverter is string, microinverter or hybrid
- battery manufacturer and model, if included
- whether the equipment is suitable for future expansion
If a quote does not identify the equipment clearly, it is harder to compare value and quality.
4) What size system is recommended, and why?
Ask how the proposed system size was calculated. The answer should be based on your usage and available roof space, not just a standard template.
You may want to ask:
- how many panels are included
- what the estimated annual generation is
- how much of my usage the system is expected to cover
- whether the design leaves room for later expansion
Generation estimates will always depend on site conditions and usage, so they should be treated as guidance rather than a guarantee.
5) What battery capacity is included, if any?
If the quote includes battery storage, ask what the usable capacity is and how that relates to your household demand. Battery proposals can be misunderstood, especially if the system is intended to support evening use, backup loads or greater self-consumption.
Ask:
- how much usable storage is proposed
- whether the battery can support backup power during outages
- which circuits would be backed up, if any
- whether the battery can be expanded later
- how the battery warranty works
If you are not sure whether a battery is worth including, ask for the quote both with and without storage so you can compare.
6) What roof work or electrical work might be needed?
Not every installation is straightforward. Depending on your roof type and electrical setup, extra work may be needed. Ask whether the quotation allows for:
- scaffold or safe access equipment
- roof reinforcement or tile replacement, if required
- consumer unit upgrades
- surge protection or isolators
- cabling routes between roof, inverter and battery location
- internal or external mounting options
This is particularly relevant for villas and older properties where the existing electrical layout may need review.
7) What warranties are included?
Warranties are one of the most important parts of any solar proposal. Ask for the warranty terms in writing and make sure you understand what is covered.
You should ask about:
- panel product warranty
- panel performance warranty
- inverter warranty
- battery warranty
- workmanship or installation warranty
- what actions might void a warranty
Also ask who you would contact if there is a fault: the installer, the equipment manufacturer, or both.
8) What aftercare and support do you provide?
Solar is not something you should forget about after installation. Ask what support is available once the system is live.
Useful questions include:
- do you provide a handover and explanation of the system?
- is monitoring included?
- how are faults reported?
- what is the typical response process if there is a problem?
- do you offer maintenance or inspection services?
For homeowners who are not always in Spain, clear aftercare can be especially valuable.
9) What paperwork or approvals are involved?
The administrative side can vary depending on the property and the type of installation. Ask which parts of the process the installer handles and which parts may need input from you or another professional.
It is sensible to ask:
- what documentation will be supplied at handover
- whether the installer helps with registration or notification steps where applicable
- whether any local or utility-related procedures are required
- whether there are any property-specific constraints that could affect the project
Requirements can vary, so anything that is not clear should be confirmed before work starts.
10) How long will the project take?
Ask for an estimated schedule covering:
- site survey
- quotation finalisation
- equipment ordering
- installation day or days
- testing and commissioning
- handover
Timeframes can change depending on equipment availability, roof complexity and any paperwork needed. A realistic timeline is more helpful than a vague promise.
11) What assumptions have been made in the quote?
Every quotation contains assumptions, even if they are not obvious. Ask the installer to explain them.
For example:
- assumed roof condition
- assumed cable route
- assumed location for inverter or battery
- assumed level of shading
- assumed usage profile
- assumed need for additional electrical work
This question is useful because it highlights what could change the final cost or design.
12) What is optional rather than included?
Ask the installer to separate essential items from optional extras. This helps you decide whether you want a basic system, a battery-ready system, or a more comprehensive setup.
Common optional items may include:
- battery storage
- backup capability
- additional monitoring
- upgraded mounting hardware
- higher-capacity inverter
- extended warranty packages
A clear breakdown makes it easier to compare like with like.
How to compare solar quotes fairly
Once you have several quotes, compare them against the same checklist rather than the headline figure alone.
Look at:
- equipment quality and model names
- what is included in the installation scope
- warranty length and who honours it
- whether battery storage is included or optional
- aftercare and support terms
- the clarity of the assumptions and exclusions
If one quote is much cheaper, check whether it leaves out items you will need later. If one is much higher, ask what extra value is included.
Questions homeowners in Costa Blanca often forget to ask
Here are a few extra points that are easy to overlook:
- Will the system still suit the property if occupancy changes?
- Is there space for future battery expansion?
- Can the equipment cope with high summer demand from cooling systems?
- Is the inverter location suitable for heat and ventilation?
- What happens if the roof or electrics need attention later?
These questions are particularly useful for villas, holiday homes and properties that may be rented out or used only part of the year.
A simple checklist to use before you commit
Before you say yes to a quote, make sure you can answer these questions:
- What is included in the price?
- Which panels, inverter and battery are being installed?
- How was the system size calculated?
- What warranties apply?
- What support is available after installation?
- What extra work could affect the final cost?
- What assumptions has the installer made?
- Which items are optional rather than included?
If any of these are unclear, ask for the quote to be revised in writing.
FAQ
Should I get more than one solar quote?
Yes. Comparing more than one proposal is usually the best way to understand the equipment, scope and support on offer. Just make sure the quotes are based on similar assumptions so you can compare them fairly.
Is the cheapest quote always the worst?
Not always, but a very low quote can sometimes mean that equipment, aftercare or scope has been reduced. Focus on what is included rather than the headline figure alone.
Can I ask for a quote without a battery?
Yes. It is often sensible to request options with and without battery storage so you can compare the difference in scope and decide what suits your home and usage.
What if my property is a second home?
That is important information to share. Seasonal occupancy can affect system design, battery needs and how much value you get from daytime generation.
What if I do not understand the technical terms?
Ask the installer to explain them in plain English. A good proposal should be easy to understand, not confusing.
Get clear advice before you compare quotes
The best solar quote is the one that is clearly explained, properly sized for your property and transparent about what is included. If you are considering solar for a home or villa on the Costa Blanca and want help understanding the options before requesting quotations, Get Free Solar Advice through the enquiry form.