Putting the batteries to bed...
QWe have two domestic batteries of 120Ah in series on a 24v system. I am considering fitting two additional batteries, but the only available space is under the bed. This is fairly close to the existing battery location. Is this okay in your view and if so, should I go for sealed batteries only or would flooded lead acid units be all right? I am concerned about possible gas escape under the bed.
PHIL DEACON, via email
ATONY REPLIES... As long as the battery connecting leads are large enough to minimise volt-drop and the positive main lead is on one battery pair with the negative on the other, I can see no electrical reason why you should not do as you suggest.
The BSS will require the battery space to be vented but that is easily done now that most batteries are supplied with a single fitting to accept a vent hose. All you need to think about is how to vent the two new hoses overboard. Even sealed batteries have a vent to prevent them exploding if subjected to excess charging voltage.
Personally, I would avoid a sealed battery. Although AGM batteries have better charge and discharge characteristics, I feel the difficulty in ordinary boaters testing them far outweighs the advantages, but that is a personal consideration.
You can place batteries under a bed, but ensure good ventilation