Yield claims are marketing
No installer guarantees the production figure they sell you on. We regularly find estimates overstated by 10 to 20%.
Solar · Battery · EV charging · Worldwide
Your installer is paid when the scaffolding comes down. From then on, the faults, the lapsing warranties, the tariff that stopped being the right one — all of it is yours to notice. A Solcerta membership is an independent expert watching it instead, for as long as you own the system. You pay us, so no installer ever can.
And what people join us to find
No installer guarantees the production figure they sell you on. We regularly find estimates overstated by 10 to 20%.
A dead string or a badly set up charger can run for months. Most owners find out from a bill, long after the money is gone.
The same system can be quoted 30% apart by two installers on the same street. Nothing in the quote tells you where yours sits.
At today's prices many home batteries do not repay their cost before the warranty expires. The quote will not mention it.
One list of what we do for you, at three levels. Choose by the size of your system and how much of it you want watched. Everything is written and sent by email, and no installer is ever involved.
SunriseOne system, checked properly, and an expert to ask when something comes up. Membership €19
a month Billed yearly at €228, VAT included. Month to month instead: €29 a month. Paying for the year saves you €120. Join Sunrise |
DaylightPanels, battery and charger — every offer scrutinised, every date watched. Membership €29
a month Billed yearly at €348, VAT included. Month to month instead: €39 a month. Paying for the year saves you €120. Join Daylight |
Full SunThe whole picture: tariff, export, bills and warranties, all under watch. Membership €49
a month Billed yearly at €588, VAT included. Month to month instead: €69 a month. Paying for the year saves you €240. Join Full Sun |
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| Size of system coveredThe total capacity of the array we cover under this membership. If your system is larger than the limit, the next membership up is the right one. A system you are only being quoted for counts at its proposed size. | Up to 15 kW | Up to 50 kW | Up to 100 kW |
| Ask us anything about your system, in writingQuestions do not accumulate. A month in which you ask nothing does not give you extra questions the month after. Send them by email and we answer in writing within 72 hours. The more detail you send with the question — the quote, the meter reading, a photograph, what you have already tried — the more useful the answer comes back. | One question a month | Two questions a month | Three questions a month |
| We check your quotes before you sign anything*Upload your quotes on the form when you join and the written report reaches you within 30 days. If you have no quotes yet, email them whenever they arrive, at any time while your membership is active, and the same 30 days applies. Send them all together, on the same day or in the same email: you receive one report covering every quote, not one report per quote. One quote report is produced per membership year. | Up to 2 quotes | Up to 3 quotes | Up to 5 quotes |
| We watch your warranty, tariff and export dates and warn you before they endWe hold the dates from the documents you give us — product and workmanship warranties, your fixed tariff term, your feed-in or export scheme — and write to you before each one lapses, while there is still something you can do about it. You never have to ask. | Yes | Yes | Yes |
| A written expert briefing every month on what changed and whether it affects youA monthly written analysis from us, the same for every member: equipment prices, tariff and export changes, regulation, warranty and recall news, and what any of it means for a system like yours. It is our own read of the market, not a digest of press releases. | Yes | Yes | Yes |
| A short seasonal checklist four times a yearFour emails a year, each sent before a new season begins — before the end of November, February, May and August. What to check and what to change so your system earns as much as it can in the months ahead, and what is simply normal for the season, so you do not call an installer over nothing. | Yes | Yes | Yes |
| We tell you if the price is too high for your area*Your quoted price normalised to euros per kW, with any battery stripped out at market value, then set against published installed-price data for your country and size band. You see exactly where you sit against the market low, median and high. | Yes | Yes | Yes |
| We work out what the system will really produce on your roof*We rebuild the production estimate from satellite irradiance for your coordinates, modelled per roof plane, using your pitch, orientation, shading and a realistic loss factor. Quoted figures are routinely optimistic because the loss assumption behind them is too low. | Yes | Yes | Yes |
| We rate the panels, inverter, battery and charger you are being sold*Every component scored on build quality, efficiency, warranty length and warranty terms, using manufacturer datasheets rather than the installer's brochure. | Yes | Yes | Yes |
| We check the maker will still exist when you need the warranty*A 25-year warranty is worth nothing from a company that will not be there in year six. We check the public financial reporting and trading position of every manufacturer named in your quote. | Yes | Yes | Yes |
| We check the size is right for how much electricity you use*Array and battery size tested against your actual consumption and the occupancy pattern you describe. Oversizing is the most common way a quote inflates its own price. | Yes | Yes | Yes |
| Everything we find is ranked by what it is worth in euros**No finding arrives without a number beside it. Every action is ranked by what it is worth against how long it takes, so you can start at the top and stop wherever you like. | Yes | Yes | Yes |
| We measure what your system really produced against what it should have**Your actual output, month by month, against what your roof should have produced in that exact period using that period's real irradiance. A poor summer is not mistaken for a fault, and a fault is not excused as a poor summer. | Once a year | Once a year | Twice a year |
| We tell you what is wrong and roughly what it costs to fix**Where production falls short we rank the likely causes — a string, the inverter, shading, soiling, configuration — with an expected cost for each, so you know whether a repair quote is reasonable before you accept it. | Yes | Yes | Yes |
| We tell you what your warranty covers and how to claim on it**What each warranty actually covers, what it excludes, who is liable and the wording to use when you claim. Most warranty claims fail on process rather than on merit. | Yes | Yes | Yes |
| Your own year-on-year record, from month 13 onwardsFrom month 13 your performance check is measured against your own previous years rather than against a model. It starts then because a full year of your own production has to be behind us before a year-on-year comparison means anything. It is the only way to see true degradation, a repair that never quite worked, or a pattern that has quietly changed. | Yes | Yes | Yes |
| We read the contract or offer for price rises, tied finance and exit traps*The clauses that cost money later: price escalation after your deposit is paid, tied finance at above-market rates, cancellation fees, deposit exposure, and what happens if the installation date slips. | — | Yes | Yes |
| We put competing offers side by side, rank them, and tell you which to take*Different sizes, different battery content and different assumptions make quotes incomparable as written. We normalise them onto the same basis, score each one, rank them, and say plainly which we would sign and which we would walk away from. | — | Yes | Yes |
| We check the installer: how long trading, accredited, insolvency, complaints*Company registry filings, how long the entity has actually traded, accreditation status, director history including prior insolvencies, and review histories across more than one platform. | — | Yes | Yes |
| We write the email for you to send back and negotiate with*Part of your quote review, so it applies to the offers and quotes you send us. A ready-to-send message carrying the specific figures, the alternative you hold and the price at which you will sign today. You paste it in and send it. | — | Yes | Yes |
| We work out whether a battery would ever pay for itself*Part of your quote review, whenever a battery appears in an offer you send us. Payback worked out on your own consumption and your own tariff, measured against the battery's warranty term. We say plainly when the answer is no, which it often is. | — | Yes | Yes |
| We help you get your monitoring account into your own nameOn written request. Many installers register the monitoring portal to themselves and keep it, so you cannot see your own production data and lose the whole history if they stop trading. We check who holds yours and draft the transfer request for you to send. We cannot compel an installer to release an account, but a clear written request usually succeeds. | — | Yes | Yes |
| One personalised report a year on whatever you are actually decidingOn written request, once per membership year. A custom report written around your situation and the decision actually in front of you: adding storage, buying an electric car or a charger, switching tariff, a heat pump quote, extending the array, or whether a repair quote is fair. | — | Yes | Yes |
| A dated document proving your system works, for when you sell the houseOn written request. A clean, dated summary showing your system performs as it should and what remains under warranty — the paperwork a buyer, a surveyor or an estate agent asks for. | — | Yes | Yes |
| Members decide what we build nextYou receive a questionnaire asking what you want us to add. We guarantee that every proposal sent to us is read and analysed, and we tell members what we chose and why. | — | Yes | Yes |
| Lifetime discount on a second homeLifetime discount. For a second membership on another property you own yourself. Email us, we check the ownership documents, and we send you a discount code or a personalised payment link to use on that second membership. It lasts for as long as both memberships run. | — | 10% | 20% |
| Lifetime discount from month 13 when you bring us a memberLifetime discount. It starts at month 13 of your own membership. Email us the details, we verify them, and we send you a discount code or a personalised payment link that applies to your membership from month 13 onwards. It can be claimed once, for one new member, and does not add up if more than one person joins on your recommendation. | — | 10% | 20% |
| We work out the cheapest way to charge your car**Charging modelled four ways — public rapid, at home on your current tariff, at home overnight, and at home following your solar surplus — with the annual cost of each, and what the charger has to be capable of to reach the cheapest one. | — | — | Yes |
| We tell you whether your type of tariff still suits your system**There are three shapes of tariff in most markets: a single fixed rate, day and night rates, or hourly pricing that follows the market. We look at when your system produces and when you actually use power, and tell you which shape suits you better than the one you are on, and what to ask your supplier for. A direction and the reasoning behind it, not a contract-by-contract quotation. | — | — | Yes |
| We tell you what to do when your export scheme ends**When your feed-in or export arrangement expires, what replaces it, what it will be worth, and the decisions worth taking before that date rather than after it. | — | — | Yes |
| We tell you when to run things, and what each change is worth**Which loads to move into daylight, what each one is worth per year in euros, and the realistic figure once you allow for the days when there is not enough surplus. None of it requires buying anything. | — | — | Yes |
| We check your bills and export settlements for errorsYour electricity statements and feed-in settlements checked line by line against your contract and your inverter's own logs. Estimated readings, wrong standing charges and under-credited export are common, and nobody else is looking for them. | — | — | Yes |
| We benchmark you against other Solcerta members in your regionYour specific yield against other members near you, normalised for array size, with the difference attributed to orientation, shading and soiling so you can see what is fixable and what is not. The comparison sharpens as the network grows. | — | — | Yes |
| An end-of-warranty review, before your guarantees quietly lapseWe review every warranty in the documents you have given us, automatically, and tell you what is worth raising while it is still free. A claim that could have been made inside a warranty cannot be made once it has expired. | — | — | Yes |
Select your membership
One system, checked properly, and an expert to ask when something comes up.
Membership
a month
Billed yearly at €228, VAT included.
Month to month instead: €29 a month. Paying for the year saves you €120.
Join SunriseWhat is included — tap any line for detail
Panels, battery and charger — every offer scrutinised, every date watched.
Membership
a month
Billed yearly at €348, VAT included.
Month to month instead: €39 a month. Paying for the year saves you €120.
Join DaylightWhat is included — tap any line for detail
The whole picture: tariff, export, bills and warranties, all under watch.
Membership
a month
Billed yearly at €588, VAT included.
Month to month instead: €69 a month. Paying for the year saves you €240.
Join Full SunWhat is included — tap any line for detail
* Part of your quote review report. Upload your quotes on the form when you join and the written report reaches you within 30 days. If you have no quotes yet, email them at any time while your membership is active and the same 30 days applies. All of your quotes are covered by one report, so send them together.
** Part of your performance check report. If you already own a system, upload its details when you join and the written report reaches you within 30 days. If you do not have a system yet, email us the details once it is commissioned and the same 30 days applies.
All prices include VAT and are per month. Memberships renew automatically at the price published at the time, and you may stop a renewal at any point before your renewal date. You have 14 days from joining to change your mind. Written questions are answered within 72 hours.
Joining as a business? Add your VAT number at checkout. Businesses elsewhere in the EU are not charged VAT at all, and Romanian businesses reclaim the 21% in the normal way.
A complete Full Sun report for one household, anonymised
Where the price sits against the market, which yield claim does not hold up, which installer has a prior insolvency behind it, why neither battery pays back, and the email that recovered €2,000 — then the rest of it: the tariff modelled against the alternatives, what happens when the export scheme ends, when to run the big appliances, two billing errors found in the settlements, who actually owns the monitoring account, and what to claim before the warranties lapse.
18 pages, PDF. Figures and company names are illustrative.
The installer, the comparison site, the battery salesman, the tariff switcher. That is not a scandal, it is a business model, and it works right up until the best answer for you is the one that earns no commission. We took the other option. Your membership is the only money we take, which is why we can still be useful in year eight, when nobody has anything left to sell you.
No referral fee, finder's fee or payment of any kind from any installer, manufacturer, supplier or finance company.
Your details are never passed on, and we have nothing to sell you once you have joined. Everything happens in writing, on your schedule.
We regularly conclude that a battery will not pay back, that a quote should be walked away from, or that nothing is wrong and the season is simply poor.
A one-off opinion is worth little on something you own for twenty-five years. Your file, your figures and your history stay with us, and the analysis gets sharper the longer you are a member.
Three steps, none of them a phone call
Ask us anything else by email
A solar purchase is decided in a week and lived with for twenty-five years, and almost everything you are shown comes from someone with an interest in the sale. Afterwards nobody checks it again: faults run for months, warranties lapse unclaimed, and the tariff that suited you in year one quietly stops suiting you in year four.
A membership puts someone independent on the other side of all of that. We benchmark the price, rebuild the production estimate, read the contract, measure what the system really produces, watch the dates, and answer whatever you need to ask. On an asset worth fifteen thousand euros or more, nineteen euros a month is not an expense.
Free calculators are built by companies that earn a commission when you buy, and they answer a general question with generic assumptions. We answer your question using your quote, your bills, your roof and your tariff. Because you pay us and nobody else does, we are free to tell you that a battery will not pay back, or that a quote should be walked away from. No free tool funded by installers will ever say that.
Yes, and that is half of our members. Your system is measured against what it should be producing for your roof and your location, faults are ranked by likely cause and cost, your warranty position is set out with how to claim on it, and your tariff, warranty and export dates are watched so none of them lapses quietly. The quote checking is there for the day you are quoted for a battery, a charger or a repair.
No. The cheapest moment to involve us is before anyone has quoted you, because that is when the decisions that cost the most money get made. Join, tell us what you are considering, and send the quotes as they arrive — your quote report follows within 30 days of us having them. Your performance check follows once the system is running, within 30 days of our having its details.
You send us whatever you have: quotes, bills, the original invoice, warranty paperwork, your tariff contract and some photographs. Whatever you upload when you join comes back as a written report within 30 days. Your questions are open from the day you join, and your dates go on our watch list the moment we have the documents.
If you already own a system, its performance check arrives within 30 days too. Sunrise and Daylight include one a year; Full Sun includes a second, within 30 days of the start of your seventh month.
Upload them on the form when you join and the written report reaches you within 30 days. If you have no quotes yet, email them whenever they arrive — any time while your membership is active — and the same 30 days applies.
Send them all together, on the same day or in the same email. Whether you send two, three or five, you receive one report covering every quote, normalised onto the same basis and ranked. It is not one report per quote, and quotes sent separately cannot be compared against each other properly.
A membership cannot be swapped part-way through. Each one is a separate subscription, so moving means starting the one you want.
In practice that is simple. At your renewal date, tell us which membership you would rather be on and we move your file across to it — your documents, your production history and everything we have already written for you come with it, so nothing restarts. If you need more before then, start the new membership whenever you like; the one you are on simply runs to the end of the period you have already paid for.
You have 14 days from joining to change your mind and cancel for a refund. If you asked us to start straight away and we have already provided part of the service, we deduct a proportionate amount for what was supplied. That 14-day right is yours by law and we do not shorten it.
After those 14 days, your membership runs to the end of the period you have paid for. We do not refund part of a period that has begun.
It renews automatically at the price published at the time. You can stop it renewing at any point before your renewal date, by email or from your account, and your membership then ends when the period you have paid for ends. We write to you before each renewal, so it is never a surprise.
Anything written, about your system, a quote you have received, a tariff offer, a repair estimate or a warranty position. Send it by email and we answer in writing within 72 hours, whichever membership you are on.
Sunrise includes one question a calendar month, Daylight two and Full Sun three. They do not carry over to the next month. Checking your quotes is separate and does not use them up.
Yes. Every price on this page is the amount you pay, with VAT already included, and nothing is added at checkout. If you are joining as a business, enter your VAT number at the payment step: businesses elsewhere in the EU are not charged VAT, and Romanian businesses reclaim the 21% through their normal return.
Each system has its own membership, because each one has its own roof, tariff and paperwork. Daylight members take 10% off a second home and Full Sun members 20%, for as long as both memberships are active. The property has to be one you own yourself.
That is when it starts being worth most. From month 13 your annual check is measured against your own previous years rather than against a model. It starts then because a full year of your own production has to be behind us before the comparison means anything, and it is the only way to see gradual degradation, a fault that never fully got fixed, or a seasonal pattern that has quietly changed. We also hold your documents, your figures and the history of what we have already told you, so nothing has to be reconstructed each time.
Daylight and Full Sun members also unlock a referral discount at month 13 — 10% and 20% respectively. It can be claimed once, for one new member.
Production modelling uses satellite irradiance data for your coordinates and is typically within a few percent over a full year. Price benchmarks come from published installed-price data for your market. Everything else depends on what you give us: if your bills, system details or shading description are incomplete, our conclusions will be less precise. We always set out the assumptions and sources we used, so you can check our reasoning rather than take it on trust.
No, and we are careful about the distinction. A certified audit is a regulated, on-site assessment carried out by a licensed assessor. This is an independent financial and technical review of what you have been offered, or of what you already own.
No. Everything is done from your documents, photographs and satellite data, which is accurate enough for financial analysis. Structural and electrical checks still need someone on site, and we say so whenever it matters.
Most of them. The analysis is physics and arithmetic, and your local prices and tariffs come from your own bills. Tell us your country in the form and we will confirm before you pay.
All three. Most quotes now bundle them, and the battery and charger are usually where the economics are weakest, so they get the same scrutiny as the panels.
Email office@solcerta.com again. Everything arrives by email, so check your spam folder first and add our address to your contacts when you join. If something goes wrong at our end, you will hear from us before the deadline rather than after it.
We keep them securely on your file, so we can answer your questions and build on our previous analysis rather than starting again each time. They are never shared with installers or anyone else, and never used for marketing. You can ask us to delete them at any time and we will.
We will tell you which of your quotes is strongest and why, and which we would not sign. We will not send you to a company we have a relationship with, because we do not have any.