Energy as a Service: Why Software Is the Key to Marine Electrification

What if marine operators didn't buy the battery, just the kilowatt-hours?

An interesting shift is happening in marine power, and much of it is invisible.

Instead of selling batteries and energy storage equipment outright, some manufacturers and energy providers are exploring a different business model: selling the energy those systems deliver.

It's called Energy as a Service (EaaS).

Rather than purchasing and maintaining expensive battery systems, a vessel operator pays for the energy they use, often measured in kilowatt-hours (kWh).

The concept makes sense. Marine operators are in the business of moving people and goods, not necessarily owning, operating, and maintaining sophisticated energy storage technology.

Why tie up capital in equipment when you could simply pay for the power needed to operate your vessels?

But there's an important part of this business model that often gets overlooked.

Energy as a Service doesn't work on hardware alone. It depends on software.

How Does Energy as a Service Work in Marine Applications?

Under a traditional equipment sales model, a marine operator purchases a battery energy storage system, assumes responsibility for its operation, and manages its maintenance over time.

With an Energy as a Service model, the energy provider or equipment manufacturer may retain ownership of the battery system while the operator pays for the energy delivered.

Depending on the arrangement, the provider may also be responsible for maintenance, monitoring, system performance, and availability.

This changes the relationship between equipment manufacturers and their customers.

Instead of a one-time equipment sale, the manufacturer or provider develops an ongoing service relationship built around energy delivery and system performance.

For marine operators, the potential advantages include reduced upfront capital investment, more predictable operating expenses, and less responsibility for managing complex energy systems.

For equipment manufacturers, the model creates opportunities for recurring revenue and longer-term customer relationships.

But it also introduces new responsibilities.

The Software Behind Energy as a Service

When a company sells a battery, the transaction is relatively straightforward.

When it sells energy, the company needs to know exactly how much energy was delivered, when it was delivered, and whether the system performed as promised.

That requires much more than a battery management system.

Several interconnected software capabilities make an Energy as a Service model possible.

Accurate Energy Metering and Data Collection

If customers are paying by the kilowatt-hour, energy measurements must be accurate, traceable, and reliable.

Embedded software helps collect and process measurements from meters, battery systems, and other connected equipment.

That information must then be securely recorded and made available to the systems responsible for usage reporting and billing.

The software also needs to account for communication interruptions, missing data, and other real-world operating conditions.

Remote Monitoring and Predictive Maintenance

When the equipment provider remains responsible for system performance, visibility into equipment health becomes essential.

Remote monitoring software can track battery status, operating conditions, temperature, performance, and other important indicators.

It can help identify abnormal conditions and alert service teams before minor issues become major problems.

More advanced analytics may also support predictive maintenance, helping providers anticipate equipment failures and plan service proactively.

This is particularly valuable in marine environments, where accessing equipment can be difficult and unexpected downtime can be expensive.

Connectivity and Software Integration

Marine energy systems often combine batteries, power conversion equipment, sensors, controllers, and communication networks.

Software must connect these components and translate their data into useful operational information.

That can involve embedded software, edge computing, cloud applications, and integration with billing, maintenance, and customer management systems.

Reliable communication is especially important when vessels operate in areas with intermittent connectivity.

The software must continue collecting information even when a connection is unavailable and synchronize data when communications resume.

From Selling Equipment to Selling Outcomes

Energy as a Service represents a broader change in how hardware manufacturers can deliver value.

Instead of selling equipment and transferring responsibility to the customer, manufacturers can offer ongoing access to equipment capabilities, performance, or measurable outcomes.

We're seeing similar models emerge across industrial equipment, connected machinery, and other hardware-intensive industries.

But these business models introduce an important question.

Is the software designed to support an ongoing service relationship, or was it built primarily to operate the equipment?

The distinction matters.

A battery may perform exceptionally well, but an Energy as a Service provider also needs the ability to measure usage, monitor equipment remotely, manage service obligations, and produce trustworthy billing data.

Without those capabilities, even excellent hardware can struggle to support the business model.

Building the Software That Makes Energy as a Service Possible

At ROK Software, we work with hardware manufacturers to develop the embedded, connected, and application software that helps sophisticated equipment deliver greater value.

For manufacturers exploring Energy as a Service or other equipment-as-a-service models, that means thinking beyond the hardware itself.

It means designing software that connects devices, captures reliable operating data, supports remote monitoring, and integrates with the systems needed to deliver and manage an ongoing service.

The business model may be energy.

But the thing that makes it possible is software.

Considering an as-a-service model for your marine or industrial equipment? Let's talk about the software capabilities needed to make it work.