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The Heart of a Sophisticated, Independent Power System
445-0089-01-01 1–5
Power System Management
As we pointed out at the beginning of this introduction, the PROsine is designed
to be the heart of your power system. In addition to refined charging and inverting
functions, the PROsine is the control center for managing your power system. As
the interface between your batteries, loads, and AC source, the PROsine:
p Takes 12Vdc and produces 120Vac to power your loads
p Takes 120Vac, when available and, via its intelligent, automatic, and fast
Transfer Relay, passes the 120Vac to your loads
p Uses its Power Share capability to tap off power to charge the batteries while
120Vac is being passed to the loads
And finally, the PROsine allows for the expansion of your system to meet
changing power requirements.
Load Management The PROsine has a built-in Transfer Relay that connects AC shorepower or
inverter output to your loads. Because the usual AC power sources (marina and
campground outlets or small generators, for example) often have limited current
availability, having the ability to manage your AC loads is extremely valuable,
and therefore the PROsine provides a number of features to facilitate this:
p The charger is power factor corrected to use AC current as efficiently as
possible and only requires 15 amps to provide rated charger output—some
other chargers require as much as 22 amps to provide the same output.
Minimizing the AC current used by the charger means more current for your
loads.
p The PROsine uses a Power Share feature which senses the AC load on the
system and gives priority to your AC loads, thereby reducing the charger
current to avoid nuisance tripping of the breaker.
p Sometimes the usual AC shorepower sources have low voltage. To avoid
loading these weak sources any further, the charger automatically reduces its
AC current draw as the AC voltage approaches the minimum acceptable level
(as set by the user).
Expandability As your power needs grow, you can connect two PROsines in series mode to
create a 120/240Vac split phase system which is capable of supplying 4kW
(continuously).
Both of these PROsines can be connected to operate from a single (but larger)
battery bank, and will work in tandem to provide the fastest possible, accurate
charge.