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To answer the questions in your post: 1. During deep cold (-30C to -20C) cycling we charge at 10-15A (this is ~ 1/10 C rate) 2. No, we do not cut off the packs during cold. Per automotive-grade requirements (which we apply across the board) the 12V battery can't "fall asleep" to preserve...

Cold temperature charging fatigues all battery cells, this is not an issue inherent to "Lithium" cells. However, each battery chemistry is more or less effected than others; NMC cells for example are quickly and severely damaged, these are the batteries that run most EV drive-trains, cheap and...

V2G is such an awesome concept but with our vehicles it would be a difficult thing to do (Tesla and Leaf) as they are too 'commercial' and not custom enough, in previous vehicles I've driven access to battery voltage was easy (home built stuff) and it would have been more possible. I agree with...

Those were the "early days"... I bricked my share of EV before Tesla even existed so I forgave them (and drive their vehicles now and have a Cybertruck on reservation now!)

I built my own Power Wall in my system using Group 31 batteries from a local company (local for me but they ship all over from their website, www.ohmmu.com/group31). My photo is ugly but the system is just plain simple! 2x10 to build the battery rack and 4AWG welding cable to connect all the...

There are a bunch of companies that offer these LFP units from USA warehouses already. Maybe not identical but same chemistry and similar performance characteristics. I put a 30kWh bank from Ohmmu Energy on my house and love them.

New member here; joined after seeing this thread because I also have Ohmmu batteries. Mine are not in my RV (yet) but are in a big rack on my wall in the garage which is where my solar charge controllers dump all of my photon-derived electrons all day! We have an "off-grid" system on our...