In parallel, as others have said. However, if this is a long term hookup, make
sure they are similar batteries of the same age. And make sure the connections
are clean and well made, because if there is a bad connection, it will have all
the appearances of a good setup, but will only have half the power.



wrote in message
...
How should more than one battery be hooked together
as a supply for an inverter? Does it matter which battery
in the group the battery charger is attached to? It will
be an automatic charger. Will all of the batteries drain
down and build back up pretty much as one big battery,
if they're connected in the right way?