Before the owners vote on a works order worth thousands, we put the numbers down: how much energy can be shared, how to split it, which filings it needs and how much each scenario could save.
Chartered, licensed engineers
Published price, VAT included
Our turnaround and the authority's, kept apart
Upfront assessment
€490
VAT included
€490 credited back if you book a €2,490-or-more service within 90 days
Shared solar lets several neighbours draw from one solar installation and split its output through allocation coefficients they agree between themselves. At Captia Energy the feasibility study costs €490 with VAT included, full permitting starts at €1,490 and later changes from €149. We file and follow the case; the authority signs the decision.
These service records were last reviewed against the law on .
What is shared solar and who decides to install it?
It is not one individual installation multiplied by the number of neighbours. It is a single installation associated with several supply points, with its own rules on proximity and mode, and with a split the building agrees and that is communicated to the grid operator. The owners meeting decides; we supply the numbers, the documents and the filings.
Installing shared renewable-energy systems in a building under the Spanish commonhold regime is agreed at the owners meeting, with the majority set by the Horizontal Property Act.Ley 49/1960, de 21 de julio, sobre propiedad horizontal, art. 17.1 (mayoría para instalar sistemas comunes de aprovechamiento de energías renovables) · read on
How much does each step cost?
Five services, each with a published price. The amounts include VAT. Any fees the authorities charge, where the procedure requires them, are separate and passed on at their exact amount: they are not our revenue.
Participants have joined or left and the split stayed as it was.
from €249VAT included
8 working days
Public fees
Where the procedure requires them
Passed on at their exact amount
Set by the authority
€490 credited back if you book a €2,490-or-more service within 90 days. Resolution work, from €2,490.
How do you know whether it pays off for the building?
Before the owners vote on a works order worth thousands, we put the numbers down: how much energy can be shared, how to split it, which filings it needs and how much each scenario could save.
Upfront assessment
€490
VAT included
€490 credited back if you book a €2,490-or-more service within 90 days
Resolution work, from €2,490
Considered delivered when: The feasibility report with the allocation scenarios is delivered and the results meeting is held.
What is included
Preliminary technical review of the roof and of the consumption data you provide.
Recommended capacity and estimated output.
Allocation scenarios between participants, with what each one saves under each scenario.
Map of the filings: what to submit, to whom, and in what order.
Economic estimate of the investment and of the payback.
A results meeting, built so you can take the findings to the owners meeting.
One round of revisions included
What is not included
The detailed design project.
The building's binding legal agreement and its legal drafting.
The installation itself.
The grid access and connection application.
The structural survey of the roof.
Who prepares and files the paperwork for the group?
We coordinate the technical and administrative side of shared solar so the project does not stall between neighbours, grid operator, documents and allocation coefficients.
Price from
from €1,490
VAT included
What it depends on
Whether the base engineering already exists (1,490 €) or has to be produced (from 2,490 €).
Number of participating supply points: the standard tier covers roughly up to ten.
Capacity and configuration of the installation.
Whether grid access and connection, an authorised inspection or extra engineering are needed (from 3,900 €).
Number of participant changes after the list is frozen, which are billed separately.
Considered delivered when: The complete file is submitted to the authority and the allocation coefficients are communicated to the grid operator.
What is included
Administrative engineering for the group.
Technical documentation for the scope contracted.
Preparation of the agreement and of the allocation coefficient file within the technical scope.
Standard regional filing of the application.
Document coordination with every participant.
Follow-up until the file is complete and replies to formal requests for correction.
Two rounds of revisions included
What is not included
The physical installation.
Grid access and connection permits where they apply and have not been contracted.
Inspection by an authorised inspection body.
Legal advice on the building's statutes or on disputes between neighbours.
Meters and metering equipment.
Work carried out by the grid operator.
Who can file the changes once it is running?
We set up the role that will handle changes to the shared installation, so adding or removing participants does not mean rebuilding the whole arrangement from scratch.
Fixed price
€299
VAT included
Considered delivered when: The manager registration is filed with all authorisations and the master record of the group is set up.
What is included
Preparation and registration of the manager role under the procedure in force.
Collection of the standard authorisations from the associated consumers.
Setup of the master record of the group: supply points, installation code, capacity, mode, coefficients and participants.
Verification that the registration has been correctly recorded.
One round of revisions included
What is not included
Legal advice.
The annual management of the group, contracted separately.
Future additions and removals of associated consumers.
Changing the allocation coefficients.
Where this service stops
Annual management of the group is contracted separately, from 390 € a year with VAT, and is not part of the registration.
Additions and removals of consumers after the manager is registered have their own price.
Legal advice on statutes or on disputes between neighbours.
Changing the allocation coefficients, which is a different service.
How does a neighbour join or leave the group?
When a participant changes, we update the group without turning every neighbour change into a whole new project.
Price from
from €149
VAT included
What it depends on
The first supply point in the operation costs 149 €.
Each additional supply point within the same operation costs 29 €.
If the change forces a recalculation of the allocation coefficients, that service is added separately.
If the group has no open file with Captia, the baseline has to be rebuilt first and is quoted.
Considered delivered when: The manager files the change and the updated list of participants is delivered.
What is included
Validation of the authorisation of the owner joining or leaving.
Update of the list of participants in the group.
Check that the allocation still holds after the change.
Filing of the change by the authorised manager.
Update of the group's file and archive.
One round of revisions included
What is not included
Complex changes to the allocation coefficients, which are a different service.
Mediation in disputes between neighbours.
Any technical change to the installation.
Changing the supply contract holder with the electricity retailer.
How is the energy split changed?
If the split no longer reflects how the building actually consumes, we recalculate or validate the coefficients and handle the update.
Price from
from €249
VAT included
What it depends on
Handling a change the owners have already agreed on: 249 €.
Optimisation with real load-curve modelling, compared scenarios and quantified savings: 590 € to 990 € depending on the number of supply points and complexity.
Number of participants in the group.
Whether the baseline has to be rebuilt because the file is not held by Captia.
Considered delivered when: The validated coefficients are delivered in the required format and the change is communicated.
What is included
Validation of the proposed coefficients and a check that they add up as they must.
Preparation of the file or agreement in the required format.
Handling the standard communication of the new split.
Filing of the change in the group's record.
In the optimisation tier: real load-curve modelling, compared scenarios and the estimated saving of each.
One round of revisions included
What is not included
Advanced optimisation with extensive hourly simulations beyond the contracted scope: quoted as a study.
Negotiation between neighbours and mediation in disagreements.
Legal advice.
Any technical change to the installation.
How does the feasibility study work, step by step?
Five steps until the owners meeting has the numbers in front of it. The meeting calendar is set by the building.
1Step 1Your part
You send us the supply points, the consumption data and the building details.
We need: List of supply points, twelve months of consumption and roof details.
2Step 2We do this
We model output and consumption hour by hour and work out the recommended capacity.
Our turnaround: 5 working days
Counted from: The day all the consumption data is in.
We do not promise: A favourable result: it may turn out not to pay off.
3Step 3We do this
We build the allocation scenarios and the map of filings each one requires.
Our turnaround: 4 working days
Counted from: The close of the technical modelling.
We do not promise: That every neighbour will agree with whichever split works out best.
4Step 4We do this
We present the findings in a meeting built so you can defend them to the owners.
Our turnaround: 5 working days
Counted from: The delivery of the report.
We do not promise: Attending the owners meeting, which is not included.
5Step 5Your part
The building votes. The meeting calendar is yours, not ours.
We need: The notice of meeting and the owners resolution.
And how does the permitting work once the vote is done?
From the owners resolution to checking, neighbour by neighbour, that the split reaches their bill.
1Step 1We do this
We freeze the participant list, the capacity, the mode and the coefficients as the baseline.
Our turnaround: 3 working days
Counted from: The signing of the engagement with the tier determined.
We do not promise: That the list will not change: if it does, it is a change request and is billed.
2Step 2We do this
We prepare the technical and administrative documents for the scope contracted.
Our turnaround: 15 working days
Counted from: The baseline being frozen and the design project or technical report delivered.
We do not promise: Filling in for technical documents that belong to the designer or the installer.
3Step 3We do this
We submit the file and communicate the allocation coefficients.
Our turnaround: 5 working days
Counted from: The close of the documents with every authorisation signed.
We do not promise: A decision date from the authority or from the grid operator.
4Step 4Depends on the regional Industry office
The file enters the regional administration and follows its course.
The timing is set by the authority. We do not commit to it.
5Step 5Depends on your grid operator
The grid operator applies the coefficients and activates each participant.
The timing is set by the authority. We do not commit to it.
6Step 6We do this
We check neighbour by neighbour that the split reaches their bill and close the file.
Our turnaround: 5 working days
Counted from: The first bill after each participant is activated.
We do not promise: Fixing a billing error of a neighbour's electricity retailer on our own account.
Which documents are needed?
This is what we need from the building to accept the engagement. Our turnaround starts counting the day the file is complete, not the day it is paid.
List of supply points that may take part
Required
Without knowing which supplies join, there is no split to calculate.
Twelve months of consumption for each supply point, or permission to look it up
Required
A correct split is calculated on the real load curve. With a single month's bill the scenario comes out wrong.
Building and roof data: area, orientation, obstacles, photos
Required
It sets the capacity that fits and the estimated output.
Distances between the roof and the participating supplies
Required
Collective self-consumption has proximity conditions; without distances we cannot confirm the group is possible.
Building data: tax number, managing agent, relevant minutes
Helpful, not blocking
It helps anticipate which majority is needed and who can sign what.
Final list of participating supply points
Required
It is the baseline of the file. Everything submitted is built on top of it.
Owners agreement and signed authorisations from each participant
Required
Without an authorisation to act, nothing can be filed on a neighbour's behalf, under article 5 of Act 39/2015.
Design project or technical report, depending on capacity
Required
It sets which technical documents are needed and which price tier the case falls into.
Installation code, if one has already been assigned
Helpful, not blocking
If it already exists, we skip requesting and verifying it.
Agreed allocation coefficients and metering and connection data
Required
It is what gets communicated to the grid operator and what decides what each neighbour sees on their bill.
How long does it take? Our work and third parties, kept apart
Our turnaround
25 working days
Counted from: The baseline being frozen and every authorisation and technical document being in.
What this turnaround does not cover
A decision date from the regional administration.
An activation date from the grid operator.
That every neighbour signs their authorisation in time.
That the installation is producing: that depends on the installer, not on us.
What depends on third parties
Regional Industry office
Registration of the file and, where applicable, a decision or a request.
No date commitment on our side.
Your grid operator
Activation of the associated consumers and application of the allocation coefficients.
No date commitment on our side.
Your electricity retailer
That the split is correctly reflected on each participant's bill.
No date commitment on our side.
We commit to filing a complete application and following it through. The decision date is set by the authority, not by us, so we do not promise it.
Which authorities are involved and what happens next?
The file is registered by the regional Industry office of the Generalitat. The grid operator activates the associated consumers and applies the allocation coefficients, and each neighbour's electricity retailer is the one that finally reflects them on the bill. We file, follow up and check neighbour by neighbour that the split arrives. What we do not do is promise the date or the outcome of a decision we do not sign.
Our work counts as delivered when
The complete file is submitted to the authority and the allocation coefficients are communicated to the grid operator.
And it does not stop counting as delivered because of
The authority's decision being favourable.
The grid operator activating the participants within any given period.
A neighbour changing their mind and wanting out after the list was frozen.
Our own turnarounds for the rest of the services, from the moment the file is complete: feasibility study 14 working days, manager registration 8, adding or removing a participant 4, change of coefficients 8.
What goes wrong when a shared installation is set up by eye?
A works order worth thousands gets voted on the strength of a sales quote nobody has cross-checked.
The split is decided by flat size instead of by consumption, and half the neighbours do not save what they expected.
The project stalls halfway through when an administrative requirement nobody looked at shows up.
The installation produces but the neighbours do not see the split on their bill, because the association of consumers is incomplete.
One inconsistent figure between what was told to the grid operator and what was registered blocks the whole file, not one neighbour's.
Participant changes pile up unfiled and six months later nobody knows which list is the good one.
The split keeps going to someone who no longer lives there and does not reach the person who does.
The registered list stops matching reality and every later filing carries the error forward.
The new neighbour pays their share of the installation without receiving energy from it.
Which cases fall outside the standard scope?
These are the situations that stop the work and require a quote before going on. They are stated here, not at the end.
If the roof needs structural reinforcement, the study stops and a separate structural survey is proposed.
If the group exceeds the size or complexity of the standard scenario, an extension is issued before going on.
Changes to the participant list after it is frozen are change requests and are billed.
If grid access and connection, an authorised inspection or structural reinforcement appear, the case moves up to the complex tier before continuing.
If the group is not correctly legalised, that has to be resolved first and this service stops.
If the regional procedure changes the requirements for the manager role, the scope is reviewed before continuing.
If a participant joining or leaving forces the coefficients to change, the coefficients service applies as well.
If no manager is registered, one has to be registered first and this service waits.
If the change of split also requires participants to join or leave, that service applies as well.
If the required coefficient format changes by law or by procedure, the scope is reviewed before continuing.
Frequently asked questions
What exactly is collective self-consumption?
Several supply points associate with one installation and share the energy it produces, under their own rules on proximity and mode. It is not one individual installation multiplied by the number of neighbours.
Installing shared renewable-energy systems is agreed at the owners meeting with the majority set by article 17.1 of the Horizontal Property Act. The study tells you what to take to that meeting; it does not convene it and does not vote.
Then we tell you so, and that is where it ends, with the numbers that prove it. Being able to say no at an owners meeting with data in front of you is worth exactly as much as being able to say yes.
Is the 490 € credited if we go ahead with the works?
Yes, in full, if within 90 days you book the permits and engineering for the group from 2,490 €. The window is 90 days because a building needs time to convene a meeting.
Do you need every neighbour's consumption data?
We need twelve months of consumption for the supplies that will take part, or their permission to look it up. With a single month's bill the split comes out miscalculated and the estimated saving does not resemble the real one.
Why does it cost more than legalising an ordinary installation?
Because it is not one individual installation multiplied by the number of neighbours. A participant list has to be frozen, each one's authorisation collected, allocation coefficients agreed and communicated, and then checked to make sure the split reaches every bill.
The list is frozen in writing at the start. A later change is a change request and is quoted: we do not rebuild a file that was already built on a different list at no charge.
Does it include the technical project?
It depends on the tier. The 1,490 € tier is for cases where the base engineering already exists. From 2,490 € it includes the standard engineering for the group. Cases with grid access and connection, an authorised inspection or higher capacity start at 3,900 €.
How long does it take?
Our work, up to 25 working days from the moment the baseline is frozen and the authorisations and technical documents are in. How long the regional authority takes to decide and the grid operator to activate each neighbour is not our turnaround and we do not promise it.
No. It is the registration and setup, paid once. Annual management of the group is contracted separately from 390 € a year, and before you sign up for it you will see in writing how many additions, removals and changes it covers.
Is the manager you or someone from the building?
It can be either: the building decides. We prepare the registration, collect the authorisations and set up the record, whoever is named.
Does every neighbour have to sign?
Each associated consumer has to authorise whoever will file on their behalf. Without that authorisation nothing can be filed for them, and that is not our decision.
The annual fee is announced by email fifteen days before it renews and can be cancelled in one click. The master record belongs to the building and is handed over complete.
Can I submit two additions at once?
Yes, and it works out better. The first supply point in the operation is 149 € and each additional supply point within the same operation is 29 €.
Do the coefficients have to change too?
Often yes, because the split was calculated with a different participant list. We check it while validating the change and tell you before charging, not afterwards. The recalculation has its own price.
What if the neighbour leaving will not sign?
Without their authorisation nothing can be filed on their behalf. That is a legal limit, not a decision of ours.
When does the new neighbour start receiving energy?
We file the change within four working days of everything being in. When the grid operator applies it and when it shows up on their bill does not depend on us and we do not promise it.
Why are there two such different prices?
Because they are two different jobs. For 249 € we handle a change of split the building has already agreed. For 590 € to 990 € we model your real load curves, compare scenarios and tell you which one saves most, and by how much.
Do you decide how to split it?
No. The split is agreed by the participants. We work out which scenarios exist, validate that the chosen one holds together, and communicate it in the format the procedure requires.
The optimisation report estimates it on your twelve months of load curves. It is an estimate, not a guarantee: if consumption habits change, the result changes with them.
When does the new split take effect?
We communicate it within three working days of the building approving it. When the grid operator applies it and on which bill it appears does not depend on us.
The feasibility study costs €490 with VAT included and is delivered within 14 working days of the consumption data being in. It may come out that it pays off, or that it does not: both answers are worth the same when thirty neighbours are asking.
Every service and every certificate, with its price including VAT, its pricing mode and third party fees listed separately, grouped by what is happening to the house rather than by what we call them.