Originally Posted by robp
My question is can I bring the battery back to life by having my TT at home for the next 5 days plugged into my domestic 110 or must it be replaced?
You can give it a try, but there are no long-term guarantees..
Your AC power to the TT's battery charge controller will be ok for re-charging the battery, but initially since your battery voltage is "0"VDC, the inline fuse by the batteries may blow. In that case you may want to use a heavy duty battery charger (connected to your battery for an hour or 2) to get the batteries voltage up, and then use the TT's battery charge controller to finish the charge.
I would keep an eye on the battery, and the temperature of the battery case, as it could get hot. Get a Volt/ohm meter and keep checking the voltage at the batteries. On the 3rd day, disconnect the AC power to the trailer, take out the 30amp inline fuse to the TT located by the battery, take a voltage reading (should be about 13.2VDC) and let the battery sit for 5 hours. Take another voltage reading after 5 hours (with no load), it should still be near the 13VDC mark (12.8 - 13.2). If it is, you may get some more usage out of it. The problem is that your Ah's will be lower than what it says on the battery. You can read 12.8 volts all day long, but as soon as you put a load on the battery (radio, fan..) the voltage tends to drop fast. If you are not dry-camping, you should be OK, as you will have shore power and TV charging while in transit.
If you have to use a heavy duty battery charger, use it only for a couple hours, then disconnect it and go back to the TT's charge controller as it a SMART battery controller and a micro-controller controls the charging process. Don't forget to reinstall the inline fuse when going back to the TT's charge controller.
Don't forget to check and make sure your batteries water level is about a 1/4 inch below the ring (that is what the battery mfr's consider full), before and AFTER the charging process.
Just my thoughts,
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