Re: [RE-wrenches] DKD Lithium Batteries

2019-03-04 Thread Starlight Solar Power Systems
Kienan, First, my advice is be sure to have a release of liability signed by the owner before you start working on this system. Improperly treated or poorly designed Li batteries can be dangerous. A major problem with the upswing of Li batteries being imported is poorly designed and

Re: [RE-wrenches] DKD Lithium Batteries

2019-03-04 Thread Kienan Maxfield
Oh, interesting. Thanks, Dan, that makes sense. If they don't have an internal BMS, that would be very worrisome. Jay, that sounds like an intriguing idea. So if you're applying a higher voltage, how would you know if it shuts off? The chemistry is LiFePO4, which is supposed to be the safest

Re: [RE-wrenches] DKD Lithium Batteries

2019-03-04 Thread Jay
Hi kienan, There is no guarantee that they have a BMS in them, not all lithium do. A simple test is to take them up carefully to a higher voltage, but not too high, to see if they turn off. As to info about them I’d want to know. Chemistry ( would be good to know if they are capable of

Re: [RE-wrenches] DKD Lithium Batteries

2019-03-04 Thread Brian Mehalic
Battle Born seems somewhat similar (internal BMS) - who knows how many different labels get slapped on batteries coming out of the same factory. Their manual does say you can do series connections up to 48 Vdc. Brian > On Mar 4, 2019, at 8:50 AM, Roberto Kruse wrote: > > Hi Kienan. > > I