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1991 Wellcraft St Tropez 3300. House Battery Bank

Discussion of batteries, chargers, wiring, generators, distribution panels, battery switches, etc.

Topic author
SilveryMoon
Posts: 2
Joined: Tue May 11, 2021 10:20 am
Vessel Info: 1991 St Tropez 3300
Location: 1000 Islands, St Lawrence River

1991 Wellcraft St Tropez 3300. House Battery Bank

Postby SilveryMoon » Tue May 11, 2021 5:43 pm

We just purchased an 1991 wellcraft st tropez. TWin 350 inboards. There are only 2 starting batteries and I would like to add a house bank of batteries.
There is an electric panel under the stairs going into the cabin with a battery select switch, off, battery 1, both, battery 2.
There is a location in this panel to install a second switch.
Is there a wiring diagram available that will help me ensure I add the house bank correctly.
20210506_121848.jpg


Any help would be appreciated.
Thank you
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Billm
Posts: 113
Joined: Fri Jun 23, 2017 9:46 pm
Vessel Info: 87 st.tropez
Location: Boston
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Re: 1991 Wellcraft St Tropez 3300. House Battery Bank

Postby Billm » Tue May 11, 2021 7:03 pm

Why go to all that trouble? A quality group 24 deep cycle battery will start those inboards just fine. Always select one battery or the other never both. Is that hourmeter for a generator? Then your generator can recharge the battery not in use.

Topic author
SilveryMoon
Posts: 2
Joined: Tue May 11, 2021 10:20 am
Vessel Info: 1991 St Tropez 3300
Location: 1000 Islands, St Lawrence River

Re: 1991 Wellcraft St Tropez 3300. House Battery Bank

Postby SilveryMoon » Wed May 12, 2021 9:26 am

The meter is for the engine hours. We spend our summer on the boat staying at anchor for several days at a time. We are adding solar panels and a house bank so that we can do that. We have done the same on our previous boats.
I was actually surprised that this boat did not have a house bank to start with.
We do not have a generator.
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CptBill
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Re: 1991 Wellcraft St Tropez 3300. House Battery Bank

Postby CptBill » Sat May 15, 2021 2:23 pm

First I'll say this, if it where me I'd add a generator instead if more battery's. Now you can add and another batt. switch but the problem is going to be how to charge all these battery's. 1 engine charges 1 battery at a time also adding or replacing a battery charger then there's the solar charger. Boat US or the ABYC web sites should have all the requirements for adding battery's and all the switches and other stuff your going to need. Today line of generators are very quiet and fuel efficient
Never Ever Ever do anything that test your wife's memory :captain:

Billm
Posts: 113
Joined: Fri Jun 23, 2017 9:46 pm
Vessel Info: 87 st.tropez
Location: Boston
Has thanked: 6 times
Been thanked: 30 times

Re: 1991 Wellcraft St Tropez 3300. House Battery Bank

Postby Billm » Fri May 21, 2021 9:52 am

Got it. That long foredeck will be ideal for solar cells. You never feel claustrophobic in the boat, even in the rain.

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