Batteries

What is a battery and what is it for?

Batteries are an integral part of guaranteed power supply systems, alternative energy systems, as well as power supplies for electric motors, light sources and other devices. Our online store of marine equipment https://automarinetechnology.com offers batteries from the world's best manufacturers Mastervolt, Victron, Exide and Xantrex whose products comply with international quality and safety standards …

Mastervolt AGM 12V/130Ah Battery

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€337.00

In AGM batteries, the electrolyte (mixture of water and sulphuric acid) is largely absorbed in glass fibre. This type of battery is entirely maintenance-free and there is no gas formation with normal use. AGM batteries can be installed anywhere. Thei..

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MASTERVOLT MPN: 62001600EU

Mastervolt AGM 12V/160Ah Battery (group 4D)

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€397.00

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MASTERVOLT MPN: 62002250EU

Mastervolt AGM 12V/225Ah Battery (group 8D)

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€532.00

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MASTERVOLT MPN: 62002700EU

Mastervolt AGM 12V/270Ah Battery (group Super 8D)

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€679.00

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MASTERVOLT MPN: 62000550EU

Mastervolt AGM 12V/55Ah Battery (group 24)

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€166.00

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MASTERVOLT MPN: 62000700EU

Mastervolt AGM 12V/70Ah Battery (group 27)

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€203.00

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MASTERVOLT MPN: 62000900EU

Mastervolt AGM 12V/90Ah Battery (group 31)

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€248.00

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MASTERVOLT MPN: 61002600EU

Mastervolt AGM 6V/260Ah Battery

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€318.00

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MASTERVOLT MPN: 61004000EU

Mastervolt AGM 6V/400Ah Battery

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€462.00

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MASTERVOLT MPN: 63001500EU

Mastervolt AGM-SL 12V/150Ah Battery SlimLine

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€435.00

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MASTERVOLT MPN: 63001850EU

Mastervolt AGM-SL 12V/185Ah Battery SlimLine

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€531.00

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MASTERVOLT MPN: 66011250EU

Mastervolt MLI Ultra 12V/1250Ah Lithium Battery

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€1,499.00

Mastervolt MLI Ultra 12V/1250Ah Lithium Battery. The MLI series deliver extreme Lithium Ion performance even under the harshest conditions, such as high charge and discharge currents, wet environments, mechanical shocks or vibrations. ..

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MASTERVOLT MPN: 66012750EU

Mastervolt MLI Ultra 12V/2750Ah Lithium Battery

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€3,020.00

Mastervolt MLI Ultra 12V/2750Ah Lithium Battery. The MLI series delivers extreme Lithium Ion performance even under the harshest conditions, such as high charge and discharge currents, wet environments, mechanical shocks or vibrations. Thi..

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MASTERVOLT MPN: 66013000EU

Mastervolt MLI Ultra 12V/3000Ah Lithium Battery

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€3,200.00

Mastervolt MLI Ultra 12V/3000Ah Lithium Battery. The MLI series delivers extreme Lithium Ion performance even under the harshest conditions, such as high charge and discharge currents, wet environments, mechanical shocks or vibrations. Thi..

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MASTERVOLT MPN: 66016000EU

Mastervolt MLI Ultra 12V/6000Ah Lithium Battery

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€5,645.00

Mastervolt MLI Ultra 12V/6000Ah Lithium Battery. The MLI series delivers extreme Lithium Ion performance even under the harshest conditions, such as high charge and discharge currents, wet environments, mechanical shocks or vibrations. Thi..

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MASTERVOLT MPN: 66021250EU

Mastervolt MLI Ultra 24V/1250Ah Lithium Battery

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€1,499.00

Mastervolt MLI Ultra 24V/1250Ah Lithium Battery. The MLI series deliver extreme Lithium Ion performance even under the harshest conditions, such as high charge and discharge currents, wet environments, mechanical shocks or vibrations. ..

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MASTERVOLT MPN: 66026000EU

Mastervolt MLI Ultra 24V/6000Ah Lithium Battery

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€5,645.00

Mastervolt MLI Ultra 24V/6000Ah Lithium Battery. The MLI series delivers extreme Lithium Ion performance even under the harshest conditions, such as high charge and discharge currents, wet environments, mechanical shocks or vibrations. Thi..

Stock StatusPre-Order

MASTERVOLT MPN: 64001200EU

Mastervolt MVG 12/120 Gel Battery

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€541.00

In Gel batteries, the electrolyte is absorbed by a Gel. This type of battery is entirely maintenance-free and has no gas formation with normal use. As no extra ventilation is required, Gel batteries can be installed anywhere. They are ideal as servic..

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MASTERVOLT MPN: 64001400

Mastervolt MVG 12/140 Gel Battery

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€653.00

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MASTERVOLT MPN: 64002000EU

Mastervolt MVG 12/200 Gel Battery

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€825.00

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How to select batteries for your boat?

In order to start the engine of your boat, marine starter batteries generate a current of 500 - 1000 amperes for 5-10 seconds. This is achieved by installing a large number of thin plates inside the batteries, which provide the maximum contact surface with the electrolyte. However, this design does not allow deep discharge of the battery, so starter batteries are not suitable for working with electric motors, pumps and powerful marine electronics.
If a single battery is used to start the gasoline engine and connect electrical equipment on the boat, choose a starting and traction battery. It can withstand a discharge of 10 amperes for 7 hours and has a starting current of 500 amperes and higher. Starting and traction batteries are often marked with DP symbols - dual purpose.
Batteries of any type are capable of starting the engine - gel, AGM or liquid electrolyte. But for sufficiently powerful gasoline and diesel engines, it is preferable to use AGM batteries.

What characteristics are important when choosing batteries?

Motor manufacturers in the documentation indicate the minimum recommended battery characteristics for their products - capacity in ampere hours (Ah) and cold cranking current (CCA) or reserve capacity (RC @ 25) and marine starting current (MCA).
When buying a battery, check that the battery you have chosen has both parameters not lower than the recommended ones. Using a battery with a lower capacity puts additional stress on the electrical system of the yacht or boat and may damage it.
Battery capacity C20 - characterizes the current that the battery can provide for 20 hours until the voltage at the terminals drops to 10.5 Volts. The higher the capacity, the longer the battery can power the devices connected to it.
Reserve capacity RC @ 25 - time in minutes for which the battery will be discharged with a current of 25 A at a temperature of 27 degrees Celsius to a voltage of 10.5 Volts.
Marine starting current MCA - the current that a new, fully charged battery provides for 30 seconds at a temperature of 0 degrees Celsius. In this case, the battery cell voltage does not fall below 1.2 Volts.
Cold Cranking Current CCA - is the same as MCA but at -18 degrees Celsius

How to properly organize battery charging on your boat.

Service batteries on a boat or yacht are designed to power on-board equipment. In addition to the service group, the vessel can be equipped with batteries for a bow thruster, an electric boat motor or an anchor winch. Considering that each group of traction batteries can have different voltages, capacities and chemical composition, the correct organization of charging these different batteries becomes a daunting task.
The solution consists of several steps.
Firstly, choose a charger that has sufficient power, has profiles for charging the main types of traction batteries and is equipped with two or three outputs.
Secondly, a decoupling device is selected for charging several battery groups from the main engine generator. It can be either a relay or a battery divider of the corresponding rating.

Special devices to help you use your batteries more efficiently.

Autonomous swimming is impossible without monitoring the condition of the batteries. In the simplest case, a voltmeter is used, however, devices that combine a voltmeter, ammeter and ampere-hour meter and other parameters in one case are much more informative and more accurate. The battery control monitor can be designed to work with one group, or to control several charging sources and batteries.
If traction batteries supply powerful consumers, for example, an inverter, they must be protected from deep discharge. Special devices designed for this disconnect the load as soon as the battery voltage drops below 11.5-12.0 volts. Protection devices are also installed when a single battery is used both for starting the engine and for powering on-board equipment.
During the movement, the traction batteries are charged from the generator of the propulsion engine of the boat or yacht. However, due to the engine generator features, the charging of traction batteries takes too long and leads to increased fuel consumption and additional wear if the engine is started on purpose to charge the batteries. Special devices increase the charging efficiency of the generator, and additional charging sources such as solar panels recharge the batteries while the engine is not running.

So, let's summarize.

Today, in our online store https: //automarinetechnology.com you can buy the most popular and reliable batteries from top manufacturers Victron Energy (the Netherlands), Mastervolt (the Netherlands) and Exide Technologies (the USA). Each of them offers all types of batteries: sealed lead-acid AGM VRLA, sealed with gel electrolyte GEL VRLA, maintenance-free OPzV batteries, and low-maintenance stationary flooded OPzS. In addition, there are a series of modular batteries with a voltage of 2 Volts, special front-terminal for use in telecommunications systems, where compact size plays a decisive role. If necessary, there are special solutions for electric motors with which it is necessary to use traction batteries, which are designed for deep discharge.
A large selection of batteries, presented in our online store https: //automarinetechnology.com, allows you to choose the best solution in terms of battery specifications and price. All batteries are CE certified.