The low internal resistance of
AGM batteries makes them highly
suitable for powering winches,
windlasses and bowthrusters, for
starting engines, and for limited
Gel batteries are highly suitable
as service batteries due to the fact
that they can be quickly charged
and have a long lifespan, even with
many charge/discharge cycles. For
a service battery you can choose
for either a 6-volt, 12-volt or 24-volt
version or the 2-volt model.
Lithium Ion batteries save up to
70 % in space and weight, last three
times longer and can be recharged
and discharged very quickly, 2000
charge cycles in normal use.
Mastervolt batteries are completely
maintenance-free and in normal
circumstances do not release
acid or generate dangerous gas.
They are easy to install anywhere
onboard, such as next to the bilge
or in the engine room (the latter
may lead to reduced lifespan due
to higher temperatures). Special
battery cases or external ventilation
are usually unnecessary as natural
ventilation will suffice.
lead-acid with Lithium Ion
The substantial benefits that Lithium Ion technology offer over lead-acid
technology means that using Lithium Ion batteries is becoming an ever
more popular choice.
When considering replacing an existing lead-acid battery bank by a Lithium Ion
battery bank one needs to take a couple of things into consideration. Although the
term ‘drop-in replacement’ is occasionally used in this case, it is actually never as
simple as that.
To get the most from the Lithium Ion batteries stay within the recommended
operating conditions. Although the batteries are set up to do this automatically and
safely, taking proper care of your new batteries will prevent nuisances during use
such as Lithium Ion batteries disengaging themselves (by a safety relay). Things to
take into consideration are:
The charge voltage of the battery bank needs to be checked and possibly changed.
Where low charge voltage will result in incompletely charged batteries, overly high
charge voltage will potentially push the Lithium Ion batteries outside their allowed
Battery monitoring needs to be shunt (Ah counting) based, not voltage based.
Some basic battery monitoring products base the battery status fully on voltage
measurement. In case of Lithium Ion batteries this will result in unreliable
readings, potentially leading to deep discharges. Only shunt-based monitoring
devices that incorporate a Lithium Ion battery type setting should be used.
The MLI Ultra series has an external safety relay (battery disconnect switch) and
integrated battery monitoring, requiring proper installation and commissioning by a
qualified installer. Setting this up correctly, including alarms and events through the
MasterBus network, results in a safe and intuitive user interface.
The MLS products have an integrated safety relay. This results in a Lithium Ion
battery that is as close as possible to a ‘drop-in replacement’ for lead-acid, as long as
the above considerations are kept in mind.
MLI & MLS series