magnum inverter

[Bonnie G]

Need help understanding what is drawing power from the house batteries. Fully charged after a long winter, first day 11.5v 24 hours later then batteries are dead. These batteries were replaced last year, no appliance running. What could be draining these batteries.

 

[Richpatty]

If they re hooked up, there are always parasitic draws… the only way to truly help prevent this is to disconnect them. Or leave them on charge.

 

[Bonnie G]

If they re hooked up, there are always parasitic draws… the only way to truly help prevent this is to disconnect them. Or leave them on charge.

Wish I could find that parasite

 

[Richpatty]

Yea...good luck. You can always install a cutoff switch on the positive side(s) of the connection at the battery.

You could use a clamp meter to try to track it down by looking for current on each positive lead off the battery, but will still not be definitive. Depending on how long the battery is not being charged, it may die over time anyway. Especially if lead acid.

 

[TheLooks]

You mention in the title a Magnum Inverter. Why? Are you actually using it and running the batteries down? How long were the batteries dead? Lead acid will not recover if left dead for long periods of time. I sorta assumed the batteries died when not being used after the winter....but were you boondocking?

 

[osuallen]

Need help understanding what is drawing power from the house batteries. Fully charged after a long winter, first day 11.5v 24 hours later then batteries are dead. These batteries were replaced last year, no appliance running. What could be draining these batteries.

At 11.5V, the batteries are already essentially dead. Is this just sitting with no known loads, or is it being used?