I have "maintenance free" (i.e. can't add water) lead acid house batteries. I charge them from shore power
and by genset. The manuals
for my inverter/charger and solar charger
suggest that batteries should be equalized periodically. However, the tech guy at the battery
seller (Batterysales.com in Miami) says 12 volt batteries wired in parallel to produce 12 volts do not need to be equalized. He said equalization
is only necessary when batteries are wired in series to produce 24 volts (or more) or when individual batteries (as part of a bank) are also used separately. Don't know what the manufacturer would say as they're made in China
and didn't come with any info.
So, is equalization
necessary/helpful or not?