batteries

[windspeed]

I have 2 12 v batteries in series for my 24 v system I want to run a 12 v electric fence from it would it harm the batteries to take of one, the amps would be very low

windspeed

[Flux]

This is one case where I think it would have little effect, especially if you change the fence over to the other battery occasionally.

Flux

[windspeed]

Thanks Flux,

relief...........

I am hesitant to ask a question in case I am accused of not doing my research first

Windspeed.

[magneticanomaly]

I tried to use power from one of a string of 2 batteries when I converted my old 6v truck to 12v with a new alternator. Changed the bulbs. Short cranking cycles won't hurt the starter. But the concern was the heater motor. So I ran it off one of two 6v batteries in string series charged by alternator.

When one battery got discharged, its resistance rose, preventing recharging of whole string.  So I ended up finding a heavy resistor to drop voltage to heater motr, everything is on 12v now.

I do agree that fence charger is smll load, may cause no problem , particularly if you shift that load from one bat to other periodically.

Another problem to watch for, however is that fence chargers, or at least the one I had,  send a hi-V pulse back on the supply line. I tried running a fence off the same battery that also ran radios in the house, and fried the radios.  I advise a separate system to run fence charger.