Owner`s manual

starting the onboard air conditioning or a
large motor load, fuel and maintenance
costs, size and weight concerns, and the ef-
fects of running the generator for nominal
loads or simple lack of use, Mastervolt set
out to improve generator technology. The
result is GPX (gen-power-box). GPX en-
ables the boater to size the generator for
continuous loads, decreases fuel and main-
tenance costs and offers a better way to
handle nominal loads.
In a single case, Mastervolt integrates a
variable speed generator, battery charger
and inverter, creating a true hybrid system.
Thus, it utilizes battery power to manage
onboard loads until they exceed the invert-
er’s capacity, then seamlessly transfers to
the variable speed motor which increases
or decreases speed with demand. This
provides the power to handle both peak
and continuous loads.
Smaller generator, more efficiency,
less budget
“Conventional generator sizing is dictated by
the highest load demand. Although the aver-
age load on the generator is much lower, you
end up with a generator that is far too large for
the power requirement. Ultimately it consumes
more of your budget, more space, and most of
its run-time is at inefficient low load levels. The
new Mastervolt GPX changes the need for this
over-specification, reducing fuel consumption
and noise levels as well,” said John DeRijk,
Mastervolt’s Chief Technical Officer.
The Mastervolt GPX eliminates concerns
about peak loads. For instance, the generator
does not have to be started before the air con-
ditioning is switched on. The inverter will power
this load from the batteries for the first 30 sec-
onds. After that the generator will start on its
own. No attention is needed—it’s fully auto-
matic. The GPX offers several operating modes
and will function according to the user profile
selected: Eco, Performance, Minimum Genera-
tor Running, etc.
The GPX follows the pattern of Mastervolt
products—plug n’play, simple installation and
operation, and feature-rich, space and weight
saving solutions that provide optimal power.
With the GPX concept a smaller generator
can power the loads since the battery helps
deliver peak power. The generator will never
run with small loads or even idle, saving the
most inefficient running time which results in
better fuel economy and less maintenance.
Mastervolt boast its highly-efficient permanent
magnet alternator converts the ‘rotating diesel
power’ into electricity 10–20% more efficiently.
Also, there is no energy loss in the transfer
from generator to battery to inverter, adding
even more efficiency. Last but not least, the
compact dimensions of the housing also save
space and weight.
GPX fits seamlessly with Mastervolt’s two eco-
friendly electric propulsion systems that optimize
power and provide onboard green solutions.
With more than 30 engineers developing
new products within this marine-focused com-
pany, expect a continual stream of innovative
ideas from Mastervolt.
For more information, visit www.mastervolt.com.
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Mastervolt's 6-volt, 260 Amp Hours AGM Battery.
The new GPX Hybrid Power.
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