In line batteries
Submitted: Tuesday, Dec 11, 2018 at 00:09
ThreadID:
137542
Views:
2911
Replies:
4
FollowUps:
0
This Thread has been Archived
Member - bill f (QLD)
Have 4x 12v 28ah batteries sitting doing nothing. What is the best way to wire them in parallel? They are going into the van connected to either a 10 or 20 watt solar panel to maintain them until I can use the van again. Bill
Reply By: Glenn C5 - Tuesday, Dec 11, 2018 at 06:50
Reply By: Peter_n_Margaret - Tuesday, Dec 11, 2018 at 09:31
Tuesday, Dec 11, 2018 at 09:31
I suggest that a "10 or 20 watt solar panel" is too big unless regulated.
5 watts would be plenty and 2 watts would be enough.
If they are AGMs they are good for at least 6 months with nothing, if disconnected from all loads.
Cheers,
Peter
OKA196 motorhome
AnswerID:
622574
Reply By: Allan B (Sunshine Coast) - Tuesday, Dec 11, 2018 at 09:34
Tuesday, Dec 11, 2018 at 09:34
.
G'day Bill,
The best way to connect batteries in parallel is per the diagram below.
Note that the take-offs are diagonal.
In this way the cable resistance to each battery is equal and each battery will contribute as equal current as possible.
Batteries in Parallel
AnswerID:
622575
Reply By: Peter_n_Margaret - Tuesday, Dec 11, 2018 at 13:25
Tuesday, Dec 11, 2018 at 13:25
Unless the loads are very high or the cables too small, most methods are OK.
The best method is the "star" method (google it) that involves taking equal length cables from each battery to a single point connection.
Cheers,
Peter
OKA196 motorhome
AnswerID:
622578