Daddy Tanuki
Solar Wizard
- Joined
- May 11, 2021
- Messages
- 1,811
the ones I am using are enclosed in a plastic box. a little prettier for the not quite so gifted like myself,Your two thermostats in series is almost exactly what my system is set up to do. One thermostat sensor is on the aluminum plate the pads are attached to. The other one is measuring the temp on the top of the cells. You are right that if one thermostat fails, the other should prevent the batteries from getting too hot - Or at least that is the hope!
when i tested the system with a glass of ice water, and then various levels of heat, it seemed to work, but until it actually runs in the conditions I intended it to work in it is a gamble. It would not be so bad if the cabin was not 3-4 hours away through the week, or if I could monitor things remotely.
My internal danger meter is pinging as this is my first set of lithium's. the AGM's I had before I had plenty of experience with. never had to worry about temps as inside the battery shed it never got below freezing even when it was -15c outside. the inverter, batteries and SCC controllers made enough heat to keep it at about 3-5c most of the time. as I can get up to 100 amps while charging at 48 volts (measured this recently while bulk charging) thats either .25c with current bank, or .15c when i get the last set of batteries in.
your system looks pretty squared away though... I like the looks of it. I still have to finalize the routing on all of my cables but am waiting until i get the last 16 cells in and commissioned to shorten, and tie down all the cables. its safe enough, just look's like azz to me. hence no photo's of the complete system yet. I have no desire to be clowned yet... figure I will wait until its final configuration has been set and then you can all laugh at me and poke fun of my work.