Hybrid Boat Battery Solutions


Hybrid boat batteries are used in boats that can get their power either from a fuelled power source (like a diesel engine) or via a stored energy source (such as a battery bank and electric motor).

The hybrid system works on the same basis as a generator, whereby the power unit is placed between the engine and the hydraulic pump that drives the boat. The propeller is driven by diesel propulsion, allowing the hybrid system to recharge the 48 volt drive batteries. Then, when the diesel engine is turned off, the electric engine from the 48 volt drive batteries is driven by electric propulsion.

The energy is controlled and converted independently by an electronic management unit and can be used to either power the electric motor or to recharge the batteries. The hybrid power unit is driven through a centrifugal clutch when using the diesel engine and so acts like a generator. It can then work as an electric motor to propel the boat instead of using the engine.

Types of Hybrid Configuration

There are three main types of hybrid configurations for boats: diesel/electric, serial hybrid and parallel hybrid, though there are a lot of variations. The best choice of hybrid configuration will depend on the type of boat and how it is used.

As well as the environmental and cost benefits, here are additional advantages to using a hybrid system. For instance having both types of power at your disposal means you can use the battery when you need to be quieter and the diesel engine if you need a lot of power, for instance in a strong current or wind, so you get the best of both worlds. And the batteries are recharged using the electric drive when running the combustion engine. Both main drive [48v] and domestic [12v] boat batteries can also be charged via a charger that is plugged into the mains shore supply.

Choosing Hybrid Boat Batteries

If you already have a hybrid battery on your boat then making a note of the details of that battery will make it easy to choose a replacement. If you want to increase the capacity of your battery then you will need an idea of how much extra you want.

If however you are planning to convert to hybrid power, you will need some additional information. These include the details of the electric motor, the charger facilities available and your expected cruising time in hours.

Traction vs Leisure Batteries

You can discharge traction batteries down to a point where there is only 20% left, but leisure batteries can only be discharged down to about 50%. This means that you will get more power to use from a traction battery than from a leisure battery with the same rated amp hour capacity.

Maintaining Hybrid Boat Batteries

The batteries we supply are easy to maintain. Fully automatic topping up and gas venting
systems are available together with all the equipment required to maintain your system.

Don’t allow a traction battery to discharge below 80% and charge it fully each time to extend the battery life.

Our batteries and workmanship have a warranty for a specific time frame which is based on the relevant manufacturer’s warranty. We also offer a service back up. Our technicians have fully equipped mobile workshops and are experienced in finding any faults and repairing them. They are also able to refurbish and install batteries as well as offer expert advice.

Get in touch today!


  • 80% of the lead used in our production process is recycled.
  • We supply a Marine Battery Range that’s clean, powerful and safe.
  • We are the UK’s largest independent supplier of industrial power product and services.
  • Our network of warehouses and engineers across the UK allows us to provide an Expert Local Service on a National basis.

CALL US - 0845 058 1388EMAIL US



"Your customer support team continue to be of enormous help to us and thank you for making the battery process as painless as possible! Thanks for your help with this account, excellent team effort."

Ros at Hako

"Was stuck outside doing this job in the pouring rain, it is also a difficult place to get too. He didn't moan and just got on with the job and was a pleasure to have on site."


Fitting on behalf of Doosan

"Very helpful and professional, overall excellent service. "


Udaler Farm

"Above and beyond, thank you very much "


Stapletons Tyres

"Really nice, thank you "



"Having used Ecobat for 99% of our battery and charger issues in the North East of England and Cumbria, they will try and get out the same day, if not, it’s the next day, very good quick service will definitely recommend to colleagues and other Linde companies"

Linda Tallentire


"Ecobat provide an excellent service, often assisting us with tight lead times, quick response along with excellent products. "

Ian Rampton BEng Robert Reather

CEO Directors, Pallet Truck Services Ltd

"Lift Safe have used Ecobat for many years as our supplier of choice for industrial deep cycle batteries. Their service & delivery is second to none."

David Redfern

General Manager, Lift Safe Ltd

"We have received only positive feedback on the new Rapid Charge batteries. Thanks to the short recharge time our customers receive greater productivity from their equipment."

William Crane

Hugh Crane

"Fast response rate, quality work & products, highly skilled engineers and a great customer services team. These are only some of the reasons why we have had such a longstanding relationship with Ecobat. "

Mitesh Pindoria

Bestway Wholesale Ltd

Getting Your Hybrid Boat Batteries Fitted

Nat-smallBatteries can be located in most places on your boat, however situating them in an accessible area near the motor and controller gear is the most suitable choice. You will however need to consider the weight of the battery in relation to the balance of your boat on the water in order for the boat to be stable. The batteries can be installed in closed spaces as long as they are fitted with automatic topping with gas venting equipment or maintenance free GEL, which gives you more storage options.

If you are planning to fit the batteries yourself we are very happy to discuss what is involved with you. We are also able to fit the batteries for you providing your vessel is accessible. We would need to have enough room to manoeuvre around the boat in order to install the batteries and will also need parking for our mobile workshop. We are unable to work on the street and will require permission from the landowner in relation to where the boat is situated.

The Ecobat Promise

We provide our customers with specialist on-site industrial battery advice, a wide choice of industrial power storage products and a single source for battery installation, maintenance and repair.

World’s largest producer of lead (840,000 tonnes/p.a.)
Over 3,500 skilled employees
QM system certified to quality standard ISO 9001 & ISO 45001
29 facilities located in Austria, France, Germany, Italy, South Africa, United Kingdom and United States