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Old 01-12-2025, 10:07 AM   #1
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Inverter problems

I have a 2008 Keystone.
I'm losing thirty percent of my power within two hours after a fresh charge, and then within five and a half hours, i'm down to fifty three percent, nothing is on? And I've still got a major draw. this morning I Turned off, the breakers pulled all the fuses, and within an hour I lost six percent. I have tested all lines for accessories, going to the battery. No draw.
So i'm thinking, maybe the inverter, either that or a bad ground. Any help would be greatly appreciated
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Old 01-12-2025, 10:15 AM   #2
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Bad cell in batterys or one of them,, Common to be full charge holding strong the taper off and any draw drops them rapid..

Inverter can have a internal oops but would probably not function well either,,,
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Old 01-12-2025, 10:26 AM   #3
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Quote:
Originally Posted by 1st-timer View Post
I have a 2008 Keystone.
I'm losing thirty percent of my power within two hours after a fresh charge, and then within five and a half hours, i'm down to fifty three percent, nothing is on? And I've still got a major draw. this morning I Turned off, the breakers pulled all the fuses, and within an hour I lost six percent. I have tested all lines for accessories, going to the battery. No draw.
So i'm thinking, maybe the inverter, either that or a bad ground. Any help would be greatly appreciated
How you tested matters. If you measured current flow in each wire, then you know. If you did measure current flow in each wire, why didn't you measure the current flow in the inverter wire. How about current flow to or from a solar charger.

If you did actually measure current from the batteries, and capacity actually dropped, then one or more of the batteries are self discharging.

If one of the batteries is hot, that one is discharging the others. To be sure, disconnect the hot one and see if the battery bank works better.

You could also charge them up and disconnect all the batteries from one another. Monitor terminal voltage. One or more may drop fast. They are defective.

Disconnected flooded cell batteries should maintain 12.7 volts (6.35) for a long time and maintain 12.4 volts (6.2) for up to 6 months.
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Old 01-12-2025, 04:04 PM   #4
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You titled as inverter, but i would fist think batteries. To test if it's not the battries. Fully charge you battries for 20+ hours. Than disconect all the wires leaving the battery/battery bank on either the positive or negitive side. Take let them rest for 2 hours. Take your voltage reading. If it a lead Acid battery/battery bank it should be right around 12.7v. Than wait your 2 hours. And retest.
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