Solar panels in Xàtiva with someone behind them
We install, sort out all the paperwork and keep watch so your roof keeps producing. An engineering firm in Xàtiva, serving la Costera and the surrounding area.
The installation
- 1 Study
- 2 Installation
- 3 Paperwork
- 4 Switched onProducing
- Xàtiva
- Canals
- L'Alcúdia de Crespins
- Moixent
- Vallada
- La Llosa de Ranes
- Genovés
- La Font de la Figuera
- Barxeta
- Montesa
- Rotglà i Corberà
- Llanera de Ranes
- Lloc Nou d'En Fenollet
- Novetlè
- La Granja de la Costera
- Cerdà
- Vallés
- Torrella
- Estubeny
- Ontinyent
- L'Olleria
- Albaida
- Aielo de Malferit
- Enguera
- Anna
- Navarrés
- Castelló (Villanueva de Castellón)
- Carcaixent
- Alzira
- Algemesí
- Gandia
- Tavernes de la Valldigna
Three things you will not have to chase
What changes when there is an engineering firm behind the job: a signed study, the paperwork filed and the installation checked every day.
We do it properly
A signed study, justified equipment and a tidy installation. No salespeople and no rushed van jobs.
Qualified, chartered engineersHow we workThe paperworkWe make it legal, without you lifting a finger
The council and the regional government (GVA), plus the certificates for your tax return. When the time comes, you have them in hand.
We file in 32 towns across the areaThe paperworkThe monitoringAnd we stay
Your actual output against the expected one, every day. If something drifts, we tell you before you notice it on your bill.
ProducingThe monitoringWhat is going on with your house?
Each sentence leads to the page that solves it, with its price and its turnaround. If none of them is yours, the last card asks you three questions and tells you which one is.
«I want solar panels on my house»
Takes you to Solar panels and batteries
«I do not know whether my panels are legalised»
Takes you to Check if they are legalised
«I have bought a house with solar panels»
Takes you to Change of ownership
«My panels export power and nobody pays me for it»
Takes you to Surplus compensation
«My installer has vanished»
Takes you to Your installer has vanished
«I need the certificate to sell the flat»
Takes you to Energy certificate
Not sure what you need? We will tell you
Three questions about things you can check at home, and we tell you which procedure is yours, what it covers and what it costs. We do not ask for your phone or your email to show you the result.
What your town hall rebates
This is what some councils in the area rebate today for installing solar, under their tax by-laws. Each town’s page has the detail and the source.
This is what staying looks like
Every installation we hand over is checked daily: its real production against the expected one. A dead string or a stopped inverter does not wait for you to notice it on your bill: we contact you first. It is what an engineering firm that monitors industrial plants knows how to do.
What we watch and what we flagOne day of production
Producing
expectedactual
This is when we called
A blown fuse took one string offline. The house still had power, so nobody notices at home. We saw it that day and called you.
Illustrative diagram
Our installations, exactly as they turned out
You do not change the roof. You change the installation. From far away you see whether it looks right. Up close you see whether it is done right.
Old town, clay tiles. The panels lie flush, following the slope of the roof.
Detail shot.
From above you see the layout: full rows, no stray panels tucked into corners.
Detail shot.
When the roof will not do, it goes to the ground. Frames on concrete footings.
Detail shot.
Sheet-metal roof in the middle of the village. The rows follow the fall of the water.
Flat terrace. Here the tilt comes from the frame.
The last light of the day, over the old terraced fields.
What we do
Solar panels and batteries
For your home, with a real study of your roof and your usage.
Electric car charger
In your garage or your building's car park. Legalised, paperwork included.
Energy performance certificate
For selling or letting. Done by engineers, with a visit.
Permits and legalisation
Also if another installer fitted your system and left without making it legal.
Maintenance and repairs
Inspection with a report, cleaning done properly, repairs.
The awkward questions
Power cuts, roof leaks, insurance. Answered straight.
What each procedure costs, VAT included and with our own turnaround
From the first visit to the first bill that drops
1
Study
Your roof in PVGIS and your usage hour by hour. Your numbers, not a sample customer's.
You: your electricity bill
2
Installation
A tidy fit, anchored to your roof type, with photos of every step.
You: opening the door
3
Paperwork
Council, regional government, registration and certificates. Full submission and follow-up.
You: one signature
4
Switched on and watched
Your installation produces and we look at it every day. If something drifts, we call you.
You: nothing
The questions everyone asks
If the grid goes down, do I have power?
With panels alone, no: for safety they shut down when the grid drops. Backup needs a battery with that function, and it is designed in from the study.
Will you give me roof leaks?
Every anchor is chosen for your roof type, and every penetration is sealed and documented with photos. And asbestos-cement roofs are never touched without legal removal.
What if you close down tomorrow?
The manufacturers' warranties are yours and the legalised file is in your name. And behind us is Captia Technology, an engineering firm with industrial clients.
Before talking to anyone, understand what you pay
0.079
the market, at 15:15
0.215
regulated tariff, day average
Today's electricity price €/kWh
At midday the market collapses just as your roof produces. That hollow is what turns into savings.
Today's electricity price, hour by hour
Understand your bill
What you really pay, what the power term is, and which part you can actually reduce.
Surplus tariffs
What each supplier pays for your surplus energy. Verified, dated, no commissions.
Grants and deductions 2026
What actually exists, what no longer does, and the certificates that lock it in.
We are from here
We work from Xàtiva: all of la Costera, la Vall d’Albaida, la Canal de Navarrés, la Ribera Alta and la Safor. We know each council’s rebates and procedures because we file them every week.
A company of Captia Technology. Chartered, qualified engineers.
From the blog: analysis without hot air
17 August 2026
A solar installation's paperwork in La Costera, step by step
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Your roof could be producing this autumn
Tell us where your house is and we will tell you what it can produce, with which rebate and which paperwork. No commitment, no salesperson at your door.