Battery Tenders
I have two new RV Batteries and want to keep them completely charged. Stupid question I know, but here goes. What size battery tender do I need to get and can I just hook it to one of the batteries in...
Forum Discussion
beemerphile1 wrote:
Can't you just plug in the RV and let the converter do its job?
Maybe not if it is a cheap single stage model.
And to answer the original question:
A smart, automatic, tender type charger with a stated capacity of 2 amps should be plenty......IF the batteries are full or near to full to start with and you don't have a **** load of batteries. Cost should be around $30-40.
BUT.....it is important to know what voltage the batteries ARE and whether they are connected in series or parallel before you connect anything to them.
The advice of connect one lead to one battery and the other lead to the other battery only works in a parallel arrangement.
The advice that works regardless is to connect the red charging lead to the red battery cable leaving the battery pack and the negative charging lead to the negative cable leaving the pack.
