Table of Contents
Compare an ESCO contract and Energy-as-a-Service by their payment calculation, equipment ownership and responsibility for performance. A business needs to know what remains after all payments, and what happens if production changes, the building is sold or the relationship ends. The model's name does not answer those questions.
This guide compares private commercial proposals for a solar project in Ukraine. The intended result is a clear set of agreed terms and unresolved questions before signing. It is not a public procurement contract template or a promise that every business will receive the same offer.
Define the result the business is buying
In an ESCO proposal, examine how remuneration relates to verified savings and who is responsible for achieving them. Financing can involve the provider, the customer or borrowed funds. Read any promise of no initial contribution alongside the work the business must fund separately. Roof repairs or switchroom preparation may still create costs outside the provider's scope.
Energy-as-a-Service, or EaaS, focuses on an agreed energy service. For a solar project, payment may depend on a specified quantity of kWh. Establish whether that means energy generated, delivered or actually used. A fixed unit price does not mean an identical monthly invoice. Check for a standing charge or minimum payment as well.
Set the priority: retaining savings, securing a defined service price, obtaining maintenance or eventually owning the plant. Treat backup power as a separate technical requirement. The financing arrangement does not determine which loads operate during an outage. Discuss specific proposals through the pages for an ESCO contract for solar PV and Energy-as-a-Service for businesses.
Separate a private agreement from public procurement
Ukraine also uses energy service arrangements in the public sector, where procurement has specific rules. Guidance for that customer may describe baseline consumption, bid assessment and contract preparation within the applicable procedure. Those provisions should not automatically become the terms of negotiations between two private companies or universal parameters for every ESCO arrangement.
First establish the customer's status, the property's status and the funding source. The company's legal form alone does not complete the applicability assessment. Where procurement or budget rules apply, the project needs a separate route under current requirements. The payment example below is solely a comparison of hypothetical private offers.
For a private project, give the legal reviewer a diagram of the actual transactions: who invests, installs equipment, generates energy, receives it and issues invoices. Property rights, network arrangements and any regulatory requirements need checking against that configuration. An EaaS label in a presentation does not replace this assessment or automatically authorize every electricity-related activity.
Compare an equivalent scope of obligations
Ask both providers to complete a short comparison matrix. Each row needs a specific condition, a responsible party and the relevant clause in the proposed agreement. An item awaiting clarification is more useful than assigning zero cost to unknown work. This is a negotiation tool, not a universal list of legally mandatory terms.
| Issue | ESCO | EaaS |
|---|---|---|
| Payment | What share of which measured result is payable? | Which quantity and price determine the invoice? |
| Preparation | Which costs remain with the customer? | What is included in starting the service? |
| Performance | How are savings and deviations verified? | How are service quantity and quality verified? |
| Ownership | Does ownership transfer, when and on what terms? | Is purchase or return of equipment provided for? |
| Completion | How is early settlement calculated? | Who removes equipment and restores the site? |
Use the same configuration, operating start date, service period and maintenance boundaries. A smaller regular payment can come with additional obligations or a larger final purchase price. Assess the whole investment through the separate solar financial model review. Here, the question is how the parties share the outcome and associated risks.
Request a sample monthly report and invoice using identical inputs. Accounting and engineering should independently obtain the same result. Differences reveal unclear units, measurement boundaries or excluded payments while terms are still being negotiated.
Agree on the savings baseline and data
A lower bill after installation does not establish that the plant caused the entire reduction. The business may have shortened a shift, stopped a production line or changed its electricity purchasing price. Agree which premises and loads are included, what the result is compared with and how operational changes are treated. Establish this before the first billing period.
Separate solar generation, direct use, exports and curtailed output. A service charged per kWh needs an agreed measurement point. Remuneration linked to savings also needs a definition of the price components that actually disappear from expenditure. Do not treat every generated kilowatt-hour as a reduction in the business's electricity purchases.
Agree access to original readings, reporting periods, review deadlines and correction procedures. Address missing data: who restores it, how a provisional estimate is made and when the invoice is reconciled. Define baseline adjustments after expansion, refurbishment or a tenant change. A convenient monitoring dashboard does not replace agreed billing rules.
Test the invoice with a hypothetical example
Assume the business uses 20,000 kWh of solar electricity in one month, replacing purchases at UAH 6/kWh. Expenditure falls by UAH 120,000 before paying the provider. Offer A allocates 70% of that amount to the provider. Offer B charges UAH 4 for each kilowatt-hour actually used, with no minimum payment. These are invented inputs, not tariffs or standard ONG Solar terms.
Under A, payment is 120,000 × 0.70 = UAH 84,000, leaving UAH 36,000. Under B, payment is 20,000 × 4 = UAH 80,000, leaving UAH 40,000. This compares one monthly settlement only. VAT, taxes, initial contributions, separate maintenance, buyout costs and other expenditure are excluded. The remaining amount is not net profit.
Now change only the avoided purchasing price to UAH 4.50/kWh. Avoided expenditure becomes UAH 90,000. Under A, the provider receives UAH 63,000 and the business retains UAH 27,000. Under B, payment remains UAH 80,000 and the remaining benefit falls to UAH 10,000. The same energy quantity therefore distributes price risk differently.
The example does not select the better arrangement over its full term. Also test lower consumption, indexation, minimum energy purchases and additional charges where the specific offer includes them. A fixed service price can support planning, but cannot guarantee a constant difference from the future price of external purchases.
Separate ownership, use and access
Identify the equipment owner during the contract and after completion. Separately establish rights to use the roof or land, enter electrical rooms and carry out repairs. Owning equipment and accessing the premises are different issues. For rented property, align the period of permitted site use with the service term and verify the necessary arrangements with the landlord.
Where equipment transfer is proposed, request an asset list, transfer conditions, any purchase payment and required system condition. Establish what happens to warranties, documentation and monitoring access. The contractual end date alone does not describe the transfer process or establish that the equipment is free of encumbrances.
Agree how a building sale, tenant change or factory relocation would be handled. Can a new user assume obligations, who approves a replacement party, and how are relocation costs calculated? Review accounting separately. Calling the arrangement a service or describing it as having no CAPEX cannot, by itself, determine balance-sheet or tax treatment.
Assign maintenance and downtime responsibility
“Maintenance included” needs a defined scope: monitoring, diagnostics, attendance, cleaning, repairs, spare parts and component replacement. Agree response and restoration times, together with exclusions. Acknowledging a fault and returning the plant to operation are different deliverables. Each needs a responsible party and a clear way to confirm completion.
Review the causes of underperformance separately: equipment failure, external outage, network restrictions, insufficient consumption or unavailable site access. Establish how each affects payment and any compensation. Assess savings guarantees through defined measures, verification conditions and consequences for failure. The word “guaranteed” alone does not reveal the risk actually accepted by the provider.
Clarify insurance, exclusions and responsibility for uninsured losses. Add incident notification and event-record retention procedures. For significant risks, request a financial scenario showing who pays, when the obligation arises and what evidence supports it. This makes responsibility assessable before operation begins, rather than leaving the first incident to define the process.
Calculate completion and early exit
Compare the whole term: regular payments, possible price adjustments, final purchase, equipment removal and restoration of surfaces. After the service ends, the business may need another maintenance agreement. Future servicing should not be assigned zero cost merely because ownership of the equipment passes to the customer.
Request early termination calculations for several hypothetical dates. The formula should explain the amount rather than leaving an undefined obligation to reimburse all costs. Agree how previous payments, equipment condition, outstanding debts and necessary work are treated. The legal review should also cover dispute resolution and the consequences of either party failing to perform.
Prepare a useful comparison package
Collect consumption profiles, bills, information about site rights and planned production changes. Add two proposals with matching technical boundaries. Before the meeting, prepare four questions:
- What does the customer pay before operation and each month?
- Which readings, formulas and adjustments determine the invoice?
- Who fixes faults and bears the consequences of downtime?
- Who owns the equipment, and how does the relationship end?
When reviewing completed solar projects, do not transfer another site's contract term or savings percentage into your own budget. Give ONG Solar the underlying data to discuss individual terms. A useful negotiation produces comparable payments, agreed service boundaries and a list of issues resolved before the agreement is signed.