Solar asset onboarding is a critical area of energy operations, where the handover from construction happens and revenue can begin, but it can be a complex process.

Collecting and structuring every document, contract and obligation you need to track on an operational project is no easy feat. Creating a data structure and system that will be understandable and traceable as you run a site for the next 25 to 30 years is even harder.

It usually takes a few days per site and several weeks for a portfolio acquisition. Similarly, setting up a SCADA feed, understanding how it all connects to the engineering diagrams takes time.

One of our customers told us that an O&M provider had supplied a single handover document of more than 700 pages. They had to sift through the entire document, create sub-documents, and then fill up a spreadsheet checking all the relevant information.

When a solar asset moves from construction into operations, the handover is where revenue can finally begin – but it’s also where complexity quickly builds.

• There is a large volume of data to process: A single asset can involve hundreds of documents, from contracts and warranties to commissioning packs, technical drawings, maintenance records and meter data.

• It’s a significant administrative burden: Teams need to know which fields to capture, where every document belongs, and how to maintain a clear, detailed folder structure that remains usable for years.

• Traceable information is required: Key data such as warranties, obligations and renewal dates needs to link back to the relevant document, page and clause, so teams can verify it quickly and confidently.

Below is a 11-step checklist covering the ten document categories you need, as well as some important steps most teams skip. This guide is focused on Europe specifically, but many of these points apply to solar farms worldwide.

Before we begin, a quick note – as with other areas of energy operations, the tools you use for onboarding can drastically speed things up and reduce risk. 

Towards the end of this blog we’ll cover how you can mitigate this risk by implementing a more automated system that reduces administrative pain and document chaos.

What Happens When Onboarding Is Done Badly

Onboarding failures are rarely dramatic, rather they show up months later when the damage is already done.

• A warranty claim gets rejected because nobody registered the equipment inside the notification window.

• Revenue starts late because the metering configuration record was wrong and the first settlement statement doesn't reconcile. 

• An O&M provider turns up without an as-built drawing and does the same site survey the EPC already paid for.

• A landowner rings about their land lease agreement and the newest amendments, but you're missing the latest version.

With bad onboarding, you can miss deadlines, lose revenue, duplicate work, create added costs, and miss the details that build trust.

The 1-Step Site Onboarding Checklist For Asset Managers in Europe

1. Define what "complete" means before you start

Write down the details you're looking to codify and track, per site, and give it an owner and a date. Without that, onboarding quickly becomes whatever the seller or EPC happened to hand over.

Be specific. ‘Documents received’ is not a finish line, while ‘Every obligation with a date on it is in the calendar, with an owner’ is.

Every dated commitment should be tracked: warranty expiries, notice periods, permit renewals, insurance renewals, PPA indexation dates, covenant reporting, planning condition reviews. Give each one an owner and a lead time that reflects when you actually need to act, not when the deadline falls – a 12-month termination notice isn't in actual fact a date 12 months out, but rather one which needs consideration from 18 months.

In Alentis, we have structured site onboarding checklists ready to use, so you don’t need to define the criteria yourself – more on that later.

2. Technical and asset handover

• As-built drawings and single-line diagrams

• Commissioning test results

• Final acceptance certificate

The final acceptance certificate is the one to chase first, because warranty periods and defect liability clocks usually run from it. Check the as-builts against what's physically on site rather than assuming they were updated after the last design change.

3. Grid and interconnection

• Grid connection agreement

• Interconnection study

• Metering configuration records

Metering configuration is where delayed revenue starts. Meter numbers, register numbers, CT ratios, half-hourly settlement setup: if any of it is wrong or missing, your first invoices won't reconcile and you'll spend the next quarter unpicking it.

4. Legal, land and site control

• Land lease agreement

• Easements and rights of way

• SPV corporate documents

Read the lease and find operational clauses rather than just the rent. Access hours, notice requirements before works, restrictions on vegetation management, RPI-linked escalators. These are the terms that catch out an O&M provider who has never seen the document. The landowner is a long-term partner, so don’t reduce the trust of the relationship by missing on the details. 

5. Permitting and compliance

• Planning permission

• Environmental permits

• Authority inspection reports

Planning conditions carry ongoing obligations that outlive construction: noise limits, landscaping maintenance, biodiversity monitoring, decommissioning bonds. Extract them into your obligations register rather than leaving them inside a 60-page decision notice.

6. Commercial and revenue

• Power purchase agreement

• Revenue settlement statements

• Tariff or incentive scheme agreement

Pull the mechanics out of the PPA into something a person can use monthly: rate, escalator, indexation date, invoicing frequency, notice periods, termination triggers. Do the same for FiT, SEG, ROC or CfD arrangements. If your billing depends on somebody remembering a clause, this is a risk for your operations.

Read more about how Alentis automates solar revenue, from PPAs to ROC and REGO certificates.

7. Finance, tax and lender

• Financial model

• Debt or loan agreements

• Audit reports

Get the live model, not the version from financial close, and find out who's allowed to update it. Loan agreements bring covenants and reporting deadlines that need to be in the same calendar as everything else.

8. Insurance, warranties and claims

• Operational insurance policy

• Equipment warranties

• Claims log

Warranties are the most commonly lost value in a handover. Each one has a start date, a duration, a notification process and conditions that void it. Log all four per equipment type. Inherit the open claims log too, because an unresolved claim from the construction phase is now yours.

9. Operations and maintenance

• O&M contract

• O&M manual

• Planned maintenance records

Map the O&M scope against the warranty conditions and the planning conditions. Gaps between those three documents are where things fall through: a maintenance task nobody is contracted to do, or a task being done in a way that voids a warranty.

10. Monitoring and performance

• Historic monitoring data

• Performance ratio reports

• Alarm and fault logs

Take the historic data, even from the commissioning period. Without a baseline you can't tell whether year one underperformance is weather, a defect, or something that was never right. Confirm you have credentials and API access in your own name rather than the EPC's.

11. Reporting and governance

• Monthly asset management reports

• Outstanding issues log

• Key decision register

Ask for the decision register specifically. It's the document nobody thinks to hand over and the one that explains why things are the way they are: why an inverter was replaced, why a clause was waived, what was agreed with a neighbour in 2021.

Where The Checklist Itself Falls Down

Most teams manage onboarding in a spreadsheet, which has major downsides. 

The file sits on one person's drive, so colleagues can't see progress and don't know what's outstanding on a site they're covering. It has no way of telling anyone that something is overdue, so overdue items are discovered rather than flagged.

The evidence lives somewhere else, in a folder structure that made sense to whoever built it, which means that to know whether something has truly been actioned involves searching through folders and email chains. 

Even worse is that when the responsible person moves on, the logic goes with them.

How Alentis Makes Site Onboarding Effortless

We built our audit agent to make the site onboarding workflow simpler and easier for energy operations teams. Point it at the handover pack, however messy, and it scans, categorises and renames the documents, then works through the onboarding tasks itself, pulling out the information each one requires and citing the page it came from. 

You can read more about our custom automation builder, which has a library of workflows including site onboarding as well as ways to create your own customisable automations.

Alentis flags discrepancies – for example, a capacity that doesn't match between the lease and the commissioning report, or a warranty period that contradicts the O&M contract.

Everything stays traceable, and completed items link back to the source document and the specific clause, which means that an auditor, lender or colleague can check the reasoning without asking you.

The checklist is shared, so your team sees the same status on the same sites. Overdue items surface on their own. 

If you're onboarding new sites and the handover packs are already stacking up, book a 30-minute demo to see how Alentis makes onboarding effortless.

Common Questions

How long should solar asset onboarding take? 

Done manually, a few days per site, and several weeks for a portfolio acquisition with incomplete documentation. Automated document structuring brings the document-handling portion down to minutes, though the decisions still take as long as they take.

Who is responsible for onboarding a new solar asset? 

Usually the asset manager taking ownership, working with the EPC or seller's project team. The handover only holds up if one named person owns the completion criteria, rather than it being split across whoever is available.

What's the most commonly missed item? 

Warranty registration and notification requirements. They're time-limited, easy to overlook during a busy handover, and expensive when a claim gets rejected two years later.

Can you onboard an asset without a complete document set? 

Yes, and most acquisitions do. The point of a structured process is knowing exactly which items are missing and who is chasing them, rather than finding out when somebody needs one.