Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-17-2019, 01:42 PM   #1
Member
 
City: madisonville la
Country: United States
Vessel Name: Princess M
Vessel Model: 2006 Mainship 34
Join Date: Aug 2015
Posts: 18
inverter/batteries etc.

I have a 2006 mainship 34 with a 3000wt inverter powered by 2 series 31 batteries. I also have 2 8d batteries for starting the mains and house power. How can I tell if the 8d batteries are both starting and house power are is one 8d for starting and one 8d for house power. Also if there a way for me to use the inverter to charge one or both of the 8d batteries? I have no gen, the boat never had one, so I have no to way to charge the 8d batteries other than the alternators or shore power unless I can do it with the inverter. Help!
__________________
Advertisement

keith c is offline   Reply With Quote
Old 04-17-2019, 02:59 PM   #2
Guru
 
djmarchand's Avatar
 
City: Litchfield, Ct/Punta Gorda, Fl
Country: USA
Vessel Model: Atlas Pompano 23
Join Date: Aug 2012
Posts: 4,699
I think you need to hire a marine electrician to figure it out for you. Or read Nigel Calder's Mechanical and Electrical Manual and then ask your question again if you need further help.



David
__________________

djmarchand is offline   Reply With Quote
Old 04-17-2019, 03:14 PM   #3
Veteran Member
 
City: New Orleans
Country: USA
Vessel Name: Czech Mate
Vessel Model: President 41
Join Date: Jan 2017
Posts: 57
You are going to have to crawl and dig around and follow/test the wires. Eventually you will want/need to map your electrical system, but a quick and easy way to answer your question is to disconnect one 8D battery and then see what does and doesn't work. Repeat with the other 8D battery. Of course even this doesn't tell you the whole story as you may have battery switches that allow you to change around your configurations. Using a battery powered inverter to charge other batteries is not a good plan. Your only good options to charge, beyond what you already have, are solar panels or a generator.
jsplichal2 is offline   Reply With Quote
Old 04-17-2019, 03:30 PM   #4
Guru
 
ranger42c's Avatar
 
City: Maryland
Country: USA
Vessel Model: 42' Sportfish
Join Date: Aug 2013
Posts: 4,486
Quote:
Originally Posted by jsplichal2 View Post
...but a quick and easy way to answer your question is to disconnect one 8D battery and then see what does and doesn't work. Repeat with the other 8D battery. Using a battery powered inverter to charge other batteries is not a good plan. Your only good options to charge, beyond what you already have, are solar panels or a generator.

Adding to that...

Or maybe there are battery switches for ON and OFF, perhaps slightly easier than a physical disconnect.

A common installation from Luhrs Group boats (including Mainship) might have one battery bank for each engine -- and each of those batteries may also do double duty as house battery for approximately half of the hotel loads.

If there's a switch, turn OFF one battery (or disconnect if necessary) and see if one engine won't start, see if half of the house -- maybe one side of the DC panel -- also doesn't work. If so, try the other one, to confirm.

Might be a PO installed the inverter to service very light AC loads, given that 2x G31 batteries isn't all that much capacity in the grand scheme of things.

Good to have mentioned that inverters don't usually charge batteries... from other batteries. I'll add there are inverter/chargers -- but it doesn't sound like that's what OP has.

-Chris
__________________
South River, Chesapeake Bay
ranger42c is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 04:12 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012