BENETEAU Lady Grey Owners’ Notes page 11

Lady Grey – Owners' Notes
Managing Battery Capacity
Lady Grey's house bank has 4 AGM batteries with 400 amp hours of total capacity.
Due to the nature of AGM batteries there is approximately 200 amp hours of battery
storage available to power the house systems. With moderate use and adequate
sunshine, the house bank is good for 2 days without engine or shore power charging.
Think of the house batteries as a savings account, and if you withdraw slowly, it will
last for two or more days. However, if you turn on the inverter without the engine
running to use the 110 volt outlets/microwave you will be 'overdrawn' pretty quickly.
For general consideration, the refrigerator/freezer draws between 2 and 4 amps/hour, the furnace and
lights are very similar in power consumption. Water pumps and heads are fairly light draws, but running the
inverter to power the microwave will draw over 100 amp hours. We recommend running the engine
whenever using the inverter.
Charging
Note: Marine deep cycle batteries take between six and eight hours to be fully charged when depleted.
Lady Grey's batteries are charged in three ways:
1. Solar: Lady Grey has (2) 100-watt solar panels. Charging the house bank from these panels is
handled automatically.
2. Engine: Charging happens automatically when the engine is running at cruising speed.
3. Shore Power: Following is the procedure for charging the batteries when connected to shore
power.
o Connect the shore power cord(s) to the dock outlet. Note that Lady Grey has two cords – a
primary 30Amp, 50' cord with a 50Amp female connection on one end and a 30Amp male
connection on the other end. The 50Amp end needs to be plugged into the boat. The
30Amp male connector end can be plugged into the dock outlet or the 30Amp, 25'
extension cord. Both cords are stored in the starboard cockpit floor lazarette behind the
helm when not in use.
o Ensure the dock outlet breaker is turned on.
o Turn on Lady Grey's Battery Charger breaker (found on the AC panel)
o Verify the batteries are charging by checking the battery/levels monitor (should quickly read
> 13V)
To problem solve shore power charging issues, follow these steps:
Check all cable connections.
1.
Verify the dock breaker is turned on.
2.
3. Check Lady Grey's primary breaker located inside the port
cockpit floor lazarette near the shore power cord outlet (see
photo on right). This breaker rarely trips but if it does try
resetting it once. If it trips a second time, then contact San
Juan Sailing for assistance. Refer to Section 4 of the white
Charter Guest Reference binder for contact phone numbers.
10
November 2023
Primary Shore Power Breaker