Re: [RE-wrenches] Fullriver Battery meltdown

Larry, Thanks for the pics... AGM's, because they are valve regulated, do need a bit more airflow around them. Remember there isn't the vast amount of electrolyte in a flooded cells AGM's they are starved electrolyte batteries the only electrolyte is what is in the Glass Matting. Has FR seen

Re: [RE-wrenches] Fullriver Battery meltdown

Steve, Here is another similar installation. There is air space on top of and some between the battery. Many of our installations have the AGM batteries completely sealed in a box. 17 years of installing battery systems like this and not one single problem. Larry Crutcher Starlight Solar

Re: [RE-wrenches] Fullriver Battery meltdown

Here is a photo of before I removed the deformed battery. The Magnum temp sensor was on one battery and the PV controller sensor on the other. I do not believe anything external caused this failure. Perhaps a shorted cell allowed the charger to pass high current continuously. Larry Crutcher

Re: [RE-wrenches] Fullriver Battery meltdown

I agree….that is something we have never done. These batteries are same date and both new when installed. Larry On May 10, 2018, at 3:49 PM, Rick Brown wrote: I’m inclined to agree with Maverick. Mixing old and new batteries is not recommended.

Re: [RE-wrenches] Fullriver Battery meltdown

Both were new, same date batteries. Currents are so low there is no heat problem. Even Charging at 70 Amps does not produce much heat even after a few hours. The batteries did expand into the containing box. Note that with many hundreds of similar installations, this is the only one that had

Re: [RE-wrenches] Fullriver Battery meltdown

Lead melts at 621. Plastics melt depending on the type between 212f and 491f ( for the most common ones) http://education.seattlepi.com/hot-water-melt-plastic-3626.html But melting and being able to be deformed is very different. jay peltz power > On May 10, 2018, at 2:48 PM, Chris

Re: [RE-wrenches] Fullriver Battery meltdown

The picture shows a group of new Fullriver batteries destined for a different site, and the ruined Crown’s I had just pulled out. They are sitting in the back of my truck. Batteries were in a basement that stays 55F year round. Temp sensors for both the Magnum inverter and Midnite Classic 150.

Re: [RE-wrenches] Fullriver Battery meltdown

I’m inclined to agree with Maverick. Mixing old and new batteries is not recommended. Differing internal resistance coupled with potentially extreme temps can lead to thermal runaway. rick brown SolShine Energy Alternatives, LLC Electrical & Solar Contracting Services

Re: [RE-wrenches] Fullriver Battery meltdown

Looks like a mix of old and new Batteries in a cabinet too small to drain excessive heat gain. Was the cabinet shaded? Or exposed to direct sun? Temp sensor on charging source? What size interconnect cables were used? Was it a bus system? Absorb with End Amps was turned on? Sent from my

Re: [RE-wrenches] Fullriver Battery meltdown

Larry, Do you have any pic's of them installed? That would help a lot in getting an idea of how/why these failed. I do have two questions for you... Were there tie down straps over the tops of the batteries? Where was the temp sensor?