bigchevy79
New Member
- Joined
- Dec 7, 2021
- Messages
- 11
I have a pellet stove that currently has my homemade battery backup system that is able to power the stove for roughly 4 hours or so if the power goes out (max draw from the stove is 300 watts). I am guessing you would call this setup a UPS... The current system has 2 6volt 200ah agm batteries connected in series and I have a 1000 watt prowatt sw Xantrex pure sinewave inverter, Xantrex prowatt sw automatic transfer switch and a Noco Genius 10 amp charger. The batteries are 10 years old and getting worn out so I decided to try upgrading to a lithium 12 volt 200ah Ampere Time. I received the battery and fully charged it and then connected the inverter and charger both up to the positive and negative terminals of the battery and the prowatt sw transfer switch is plugged into the inverter and tried both powering a small house fan and also running nothing soputting no load at all on the inverter. This setup would work for a few minutes and then the inverter and battery charger both would trip and show an overvoltage alarm of about 17 volts. I ran several tests using just the inverter on the battery and using just charger on the battery and everything was fine but as soon as I connected both the inverter and charger up to battery at the same time I would get more overvoltage. I double checked the settings on the battery charger to make sure it was setup for charging lithium batteries.
I tried this setup on a few other batteries that I have and had no problems at all but unfortunately they are not lithium batteries. I contacted Ampere time and they had me do a few tests as well including connecting the charger to the back of the inverter instead of to the battery terminals. This test caused the same over voltage alarm after a few minutes. They concluded that their battery can't be used as a UPS and they sent me a shipping label and sent me a refund. Hats off to Ampere Time for trying their best to help me figure this out and quickly sending me a refund. So am I stuck using AGM batteries with this setup? Do I need an extra component for this setup to use a lithium battery?
I tried this setup on a few other batteries that I have and had no problems at all but unfortunately they are not lithium batteries. I contacted Ampere time and they had me do a few tests as well including connecting the charger to the back of the inverter instead of to the battery terminals. This test caused the same over voltage alarm after a few minutes. They concluded that their battery can't be used as a UPS and they sent me a shipping label and sent me a refund. Hats off to Ampere Time for trying their best to help me figure this out and quickly sending me a refund. So am I stuck using AGM batteries with this setup? Do I need an extra component for this setup to use a lithium battery?