Blew the caps off
billybob9 Registered Users Posts: 141 ✭✭
Couldn't get a charge to hold on one of my 6v batteries which was number 1 of my 24 volt group. My new EPEVER controller was already in line and I wanted to test it out, so I fired up the system with one very low battery. Everything was looking fine until I turned on my small fridge and my 1000W Inverter tripped off. After a few tries, I took out two 6v batteries and replaced it with a 12v battery out of my truck. Now my 24v system was supporting the fridge and charging the batteries. Everything looked OK as I checked out the controller and later as the sun went down, shut off the fridge and went inside for dinner. After dinner I checked on the system and found the truck battery in a puddle of water with the caps blown off. I probably damaged the battery but it still worked. Live and Learn....BG
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Series connected batteries need to be very similar (or ideally matched) AH capacity, or bad things can happen (and series connected batteries need to be similar state of charge too--Or the high SoC cells will get over EQ'ed too).
word of caution.....hydrogen gas mixed with oxygen as in batteries gassing burns at 6350 feet per second....it's rather dramatic.....remember the pictures from Fukushima Nuclear Power plant.....the explosion....hydrogen gas and oxygen from the dissolving zirconium fuel rod cladding......
Not sure of AH on the truck battery ( 10 yr old ) it only reads 850 cold cranking amp on the battery side. The 6v Interstate golf cart batteries are 235 AH ( So they say ). There probably was a difference in Battery charges .
Yeah, that was really stupid of me to do that but now it just might save someone else, since it's never been mentioned. I should have know better. I once told a doctor he had the wrong bottles and Oxygen was the green ones..Thanks
With caps off tried to check electrolyte level that was stated on one site as 1 cm above plates and another that said Interpolate meniscus at 1cm above plates. Hard to see with small holes unlike the golf cart batteries but I think I'm close. No bulges or abnormalities that I can detect so here goes. Thanks
As I'm charging now and hoping for no worse case scenarios as you have mentioned. I've read all your possibilities and will probably just put it back in my truck, start it up then unplug it and drive to Costco for a new one. Hopefully my alternator will get me there ( or will it ). I don't want it blowing up in my truck. BG
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