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the only thing we NEEDED to change was the BIM. got a Li-BIM and all is well.
about my batteries - two, they are renogy 100amp, they are "smart" batteries, in that they will self protect, that is if it gets too cold, will not charge. the batteries cable together and have a monitor that i placed in the kitchen. that monitor displays the charge or discharge rate in amps, current capacity in percentage, and total capacity in amps. the monitor is very important to us.
i have seen that renogy now is selling a battery that will warm itself. i called them to discuss how that is accomplished, as i do not want my batteries to drain themselves for the sake of staying warm. we are frequently in below 32 degree temps from sept through march. renogy states that the batteries sense when they are being charged and use some of that charge to heat itself. they will not use energy for heating if they are not being charged, thus will not self drain. i am not trying to sell the battery, just inform readers as to how they work. I didnt know, so i asked and found out. now you know too!
also, be aware that there are discussions on this forum that state some of the original installation BIM's were not wired correctly from the factory, so you may want to check your BIM wiring, especially when changing it out.
Finally, if you do go with renogy, be aware that the cable connections at the battery have open ports that NEED to be protected from the weather/elements.
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