Engine power in marine systems refers to the mechanical energy produced by an engine to propel a vessel and operate onboard systems. Traditionally, this power was solely generated by the main propulsion engine, often supplemented by auxiliary diesel generators. However, advancements in technology have introduced more efficient and sustainable methods of power generation.
The Integrel E-Power system represents a significant innovation in this field. By harnessing the excess mechanical energy produced by the engine during normal operation, the system converts it into electrical energy. This process not only improves fuel efficiency but also reduces the reliance on traditional generators, offering a more environmentally friendly and cost-effective solution for marine vessels.
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Integrel E-Power is an innovative alternative to conventional diesel generators, designed to harness unused engine power onboard boats. By converting spare mechanical energy from a vessel’s inboard engine into stored electrical energy, it powers appliances on-demand while the engine operates at optimum performance.
We bring this solution to the marine and specialist vehicle markets through our longstanding technical partnership with Mastervolt, enabling seamless integration with Mastervolt Li-Ion battery systems.
Fitted directly to the inboard engine, Integrel E-Power captures otherwise unused energy and stores it in high-capacity batteries. The Integrel Intelligent Controller converts this raw energy into stable 48V electrical output, monitored by sensors to ensure battery safety and efficiency.
The stored energy powers heavy-duty 48V equipment like bow thrusters and winches, as well as 12V domestic systems such as fridges, instruments, and lighting. It also supports 110V or 240V AC appliances, including air conditioning, freezers, induction cookers, espresso machines, and more.
Schematic example for a dual system used on multihulls

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FAQs
How much power does Integrel E-Power generate?
Up to 18kW! The Integrel E-Power can generate up to 9kW of energy for a monohull and up to 18kW of energy on a multihull as you’ll need two systems.
What are the differences between a generator and Integrel E-Power?
The most obvious difference is that Integrel E-Power does not require a separate engine. This means that the fitting costs are less than for a stand-alone generator with no need for through-hull fittings and no separate fuel, exhaust or cooling systems. Lifetime maintenance costs are also substantially less as E-Power only needs a periodic belt change; no more second engine checks and maintenance schedules.
Integrel E-Power also improves the fuel efficiency of the propulsion engine, reducing overall vessel fuel consumption by up to 25%. It is fully automatic, managing electrical power generation, storage, conversion and distribution in one package.
Our system lets you reduce the size of your 12V and 24V house battery banks with its powerful battery-to-battery charging capability, and reduces the size and weight of the cabling for power hungry consumers such as bow thrusters, windlasses and winches.
Why does a catamaran need two Integrel E-Power systems?
The Integrel E-Power system is self-organising and can run with two units connected together, sharing the load as needed with no user intervention required. Two systems provide redundancy and balanced engine running hours; they can also charge multiple battery banks at twice the rate of a single system and can support high continuous loads.
How is Integrel E-Power different from a high power alternator?
Integrel E-Power is a complete power generation, storage, conversion and distribution system.
Integrel E-Power is very different from a conventional high-power alternator:
- E-Power delivers rated power continuously. For example, with an ambient temperature of 25°C, the generator delivers a constant 8.3kW.
- The coupling of the magnetic flux between the rotor and stator has been dramatically improved to give a very high generation efficiency.
- The windings have been designed to give the specific voltage range needed and to provide unusually high power output at low revs. With a suitable engine, up to 3.5kW of DC output power is available at low engine idle.
- E-Power itself has no embedded electronics and much improved cooling airflow to better manage high power output.
- The customised engine mountings are specifically designed to minimise side loads on the engine, eliminate shock loading, and maximise belt life.
What does your Warranty Policy cover?
A full copy of our Warranty Policy can be found here.
Transform your power system with the cutting-edge Integrel E-Power solution, offering seamless energy generation while you sail. Say goodbye to traditional diesel generators and hello to efficient, on-demand power for all your onboard appliances.
Want to learn more? Contact us today to explore how the Integrel system can enhance your boating experience and keep you powered up wherever the journey takes you!
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