Key takeaways
- Energy-as-a-Service is a contract in which the customer pays for a defined energy outcome, such as resilience, availability or verified savings, while the provider owns, operates and is accountable for the assets that deliver it.
- A PPA sells delivered energy at a price per unit, while energy-as-a-service sells a contracted outcome, so the provider is also accountable when that outcome is missed.
- Energy-as-a-Service works when the outcome can be measured continuously, the technical and commercial risk can be priced correctly, and the financing structure fits both the contract and the asset life.
Energy as a service is easy to describe and hard to run. The customer stops buying batteries, chargers or a microgrid and starts paying for what they deliver. The provider keeps the equipment and, with it, years of operating, degradation and financing risk.
This guide is written for the provider: the CEO, commercial or service leader at an equipment maker, integrator or energy service company deciding whether to turn a product into an energy-as-a-service model. The decision is not whether customers like paying monthly. It is whether you can carry what the customer stops carrying, and which parts of that you need to build before the first contract. It draws on our whitepaper Beyond the Meter, based on P2S research across more than 500 industrial As-a-Service cases.
What energy-as-a-service means
Definition. Energy-as-a-Service (EaaS) is a contract in which the customer pays for a defined energy outcome, such as resilience, availability or verified savings, while the provider owns, operates and is accountable for the assets that deliver it.
Three things move from customer to provider. The capital cost, so the customer avoids the upfront investment; whether the payments count as an operating cost depends on the contract and the accounting standard, as the FAQ below explains. The operational risk: maintenance, degradation and obsolescence. And the responsibility for performance, which is what the customer is really paying for. Those are the energy-as-a-service benefits buyers see; for the provider, each one is a cost to carry. In return the provider gets recurring revenue and a closer, longer relationship with the customer, provided the outcome is priced for the risk it carries.
Behind the shift sit four signals our whitepaper tracks: grid connection queues that make on-site capacity faster than new connections, hardware prices that compress margins on equipment sales, buyers who procure outcomes rather than assets, and monitoring technology that makes outcomes verifiable. The margin is moving from the equipment to whoever can measure, contract, finance and operate the outcome.
How EaaS compares with a PPA, a lease, an ESCO contract and a service contract
The labels overlap, and buyers use them loosely. What separates them is what the customer pays for and who carries performance risk.
| Energy-as-a-Service | Power purchase agreement | Lease | ESCO energy performance contract | Service contract | |
|---|---|---|---|---|---|
| Who owns the assets | The provider or its financing partner | A developer or its investors | The lessor, with use by the customer | The customer, or the ESCO during the term | The customer |
| What the customer pays for | A contracted outcome: availability, resilience or verified consumption | Electricity delivered, at an agreed rate per unit | Use of the asset over a set period | The measures, paid from or backed by calculated savings | Maintenance and repair work |
| Who carries performance risk | The provider, for the outcomes in the contract | The developer, for output | Shared: the customer for output, the lessor for maintenance if included | The ESCO, for the savings it guarantees or shares | Mostly the customer |
| What happens when performance falls short | Remedies written into the contract, such as service credits | Usually the customer buys fewer units, unless output is guaranteed | The payment usually stays the same | A shortfall payment or a smaller savings share | A repair visit under the agreed response times |
The US EPA describes the two main forms of third-party solar financing simply: under a lease the customer pays for the use of a system over a period, rather than for the power generated; under a PPA the developer sells the power generated at a fixed rate. EaaS borrows from both and adds an outcome. The 25-year agreement behind Montgomery County's Brookville bus depot microgrid shows how blurred the line is: the FHWA describes it as structured similarly to a PPA, but it also covers use of the charging infrastructure and an assurance that the buses keep charging during utility outages. Our guides to microgrid as a service and the ESCO model vs energy-as-a-service go further into those two comparisons.
The case: pay-per-use energy for forklift fleets
The customer problem. Warehouse and forklift operators face downtime risk, battery management and spare batteries. For smaller operators, the upfront cost of lithium-ion compared with lead-acid blocks the switch, as our whitepaper's UgoWork case describes.
The commitment. UgoWork, a Canadian maker of lithium-ion batteries and charging solutions for industrial trucks, offers customers a choice between buying the batteries and pay-per-use plans proportional to energy consumption, according to the company. On our podcast, UgoWork described exit-anytime contracts with no usage minimums. The customer's payment follows its use, and it can leave.
The design decisions. That flexibility rests on three choices:
- The batteries are monitored. UgoWork connects its batteries to an IoT and cloud platform to detect anomalies before they cause damage or downtime.
- Someone works the data. The company assigns customer success managers who analyse fleet performance and recommend changes in truck use, maintenance and energy.
- The capital sits with a partner. In the case documented in our whitepaper, financing runs through a dedicated partner, with the provider self-funding only edge cases. Separating the software layer from the hardware-backed financing lets the provider grow the service without putting its balance sheet at risk on each deal.
The result. UgoWork reports that a major player in the North American fruit and vegetable market used the monthly data from its contract to see that its reach trucks travelled more than they lifted, moved travel work to pallet jacks and reduced the size of its reach fleet. That is a company-reported example, not an independently measured one, and it says nothing about UgoWork's own margin. What it does show is where the value of the model came from: the data the provider collected, not the battery.
The trade-off for the provider is clear. Exit-anytime terms remove the customer's lock-in, so the provider carries utilisation risk and needs to redeploy assets that come back. That is a reasonable risk when the batteries are monitored and the capital is structured to absorb it.
Where EaaS breaks
Recurring billing does not create margin by itself. Our whitepaper names six recurring margin risks: underpriced degradation and augmentation, weak contract boundaries, poor telemetry quality, manual billing, financing mismatches, and sales incentives that reward booking volume over contract health. In our experience, each shows up in the accounts in a recognisable way:
- Underpriced degradation and augmentation: the asset delivers less in year eight than the price assumed, and restoring capacity comes out of your margin.
- Weak contract boundaries: open-ended liability for grid events, misuse or site conditions you do not control.
- Poor telemetry quality: if both parties cannot read the same data, each disputed invoice becomes a negotiation.
- Manual billing: usage-based invoicing across a fleet cannot run on spreadsheets without errors and headcount.
- Financing mismatches: short-term money funding long contracts squeezes cash just as the fleet grows.
- Misaligned sales incentives: commissions paid on signature can reward deals with weak risk terms.
What has to be true before the first contract
Our whitepaper describes an EaaS offer as five layers that have to work together, and the offer is only as strong as its weakest one: hardware, software, services, verification and governance. Each answers a different question, and each needs an owner before you sign.
- Hardware: storage, inverters, thermal management, safety systems, controls and site integration. Is the equipment specified for the duty cycle the contract promises, not the datasheet?
- Software: monitoring, dispatch, forecasting, optimisation and fleet orchestration. Who decides how the asset runs, and can the customer override it?
- Services: commissioning, maintenance, augmentation, field response, warranty and end of life. Can you meet the contracted response times in each region you sell into?
- Verification: telemetry, dashboards, audit logic and one contractual source of truth. Will both parties accept the same data for the invoice?
- Governance: KPIs, SLAs, exclusions, liability caps, repricing triggers and dispatch rights. What happens when usage, tariffs or regulations change during the term?
The control questions matter most. Measuring an outcome is not the same as controlling it. If the customer runs the site, decides the load or can override dispatch, a guarantee on savings or resilience is a guarantee on someone else's behaviour. Write those conditions into the contract as exclusions or repricing triggers, or leave that outcome out of the promise. Our guide to energy storage as a service shows how to choose which outcome to guarantee.
When EaaS is the wrong model
The model is the wrong answer for some products and customers. Consider a simpler structure when:
- The customer wants to own the asset, for strategic or tax reasons. Sell the equipment with a performance-based service contract instead.
- The outcome cannot be measured continuously. Offer availability of the asset within defined conditions, and report savings rather than bill on them.
- You cannot fund the term. Self-fund the first three to five projects to build a track record, then bring in a financing partner that owns the assets, as in the case above.
- The asset life is shorter than a sensible contract. A service that ends when the equipment does leaves no room to recover the cost of capital.
Frequently asked questions
Is energy-as-a-service the same as an ESCO contract?
No. An ESCO is typically paid from a savings calculation against an agreed baseline, while an energy-as-a-service provider is paid for a contracted outcome such as availability or verified output. The two can overlap when an EaaS offer includes a savings-linked charge. Offers marketed as efficiency as a service usually sit closest to the ESCO model, because the provider is paid from energy saved rather than output delivered. Our article on the ESCO model vs energy-as-a-service explains when shared savings still fits.
Does EaaS sit on or off the customer's balance sheet?
It depends on the contract terms and the accounting standard, so customers check it with their auditors. Under IFRS 16, a contract contains a lease if it conveys the right to control the use of an identified asset for a period of time in exchange for consideration. The more the provider decides how the asset runs and the more the contract pays for an outcome rather than an asset, the stronger the case that it is a service. Treat this as a design consideration, not accounting advice.
How long is an energy-as-a-service contract?
It ranges widely and follows the asset and the financing. UgoWork describes exit-anytime contracts with no usage minimums for forklift batteries, while Montgomery County's microgrid agreement runs for 25 years. Shorter terms suit mobile, redeployable assets. Longer terms suit fixed infrastructure that has to be repaid on one site.
Decide what you can carry before you sell it
EaaS moves capital, operating risk and performance accountability from your customer to you. Before you design the price, check that you can measure the outcome continuously, control the conditions that drive it, fund the term and run the five layers behind it. If one is missing, narrow the offer, add the partner who fills the gap, or sell the product with a service contract until you can.
Beyond the Meter: how Energy Storage & Utilities win with outcome-based service models. If you are designing the offer rather than buying one, the whitepaper adds the contract architecture behind availability, savings and performance models, the six operating dimensions to design before the first contract, the financing paths from first project to scale, and six practitioner cases. Download the whitepaper or book a conversation with a partner.
Related reading
- Energy Storage as a Service: which outcome can you profitably guarantee?
- Microgrid as a service: how zero-CAPEX contracts work
- The ESCO model vs energy-as-a-service
- The XaaS maturity model in manufacturing
- From CAPEX to outcomes: how CFOs manage assets as a service (podcast)
- Energy-as-a-Service in action: UgoWork's model (podcast)
Sources: US EPA, Green Power Markets: Financing; FHWA Center for Innovative Finance Support, Project Profile: Montgomery Microgrid Charging Depot P3, Maryland; UgoWork, Energy-as-a-Service in material handling and logistics; IAS Plus, IFRS 16 Leases summary; P2S Management Consulting, Beyond the Meter (2026) and The Products to Services Podcast #4.
