I have a thread on " The Hull
Truth" and was asked about the boat's electrical system
I thought I would copy it over here and share it with you.
The DC systems
Originally Posted by v12mac
Some day if you have a moment could you post sort of a thumb nail sketch of how the DC systems work / are laid out on her?
The DC system as I said is in layers.
Power into the system
2- 85 amp alternators on the main engines. Alternators modified with Balmar
Max Charge 614 digital regulators with a Balmar
3- 285 watt solar panels
Victron 3000 watt Multiplus inverter charger
2 - Balmar Digital Duo Chargers.
8 - 6 volt DC-250 Full River AGM
batteries totaling 1000 Amp Hrs at 12 VDC House Bank
2- Group 31 Odyssey 1150 CCA start batteries. One on each engine
. Gen set uses port engine battery
for cranking and has no charge feature except when powering the inverter charger
Everything charges the house battery
bank. The engine start batteries are charged off the house bank thru the Balmar Digital Duo Chargers, they are a 30 amp 12 VCD to 12 VDC battery charger. Three stage charge. They are monitored by both volt and amp meters.
The two alternators charge the house bank when in normal operation. The Balmar Centerfielder controls the two alternators thru the two Max Charge 614 regulators.
is equipped with an amp meter and the house bank is monitored with a Victron battery monitor
that shows voltage, and current
rate of charge and discharge.
In case of a failure of the house bank, thru a series of battery switches, the source voltage and alternator
output can be switched to the engine start batteries as a back up, in that setup, the Centerfielder is cut off and each engine charges it's start battery.
In case of house bank failure, all DC systems except the anchor windlass
and the inverter can be run on one of the engine batteries to maintain lighting
, pumps, navigation
, the watermaker
and other systems.
The 3 solar panels
charge the house bank thru a Victron MPPT
In normal operation, it charges the house bank. However, it's output is also equipped with 2 switches that allow it in backup mode to charge the 2 start batteries.
When the main engines are online, we shut down the solar
On shore power
or with the gen set, the Victron Multiplus can charge the house bank at up to a max 120 amps, but we have set it to only charge at up to 90 amps.
On the AC side, there are 3 power inputs. 50 amp shore power
, 3000 watt Victron Multiplus inverter charger, and a 5.5 kw Next Gen gen set.
All power systems input thru the inverter.
When there is no AC input, the inverter will provide up to 3 kw from the house bank.
The system is configured that the inverter will run all AC system except the 3 HVAC
units, the water
pump for those units, the water
heater, and the washer-dryer.
Those systems will only run on shore power or on the gen set.
The water heater is a huge power draw [ 1200 watts at 120 VAC] so it has both a heat exchanger
that uses heat from the starboard engine cooling
system and 2 water heating
on top of the hardtop to heat water.
As I said before, I did my best to layer the systems to have several sources of backup power.