Rosie and Lithium batteries

[dapdan]

All,

I had already asked the same or similar question somewhere in this forum. I am in the habit of buying used or 2nd life EV lithium batteries for use in solar off grid. The 2nd life EV modules tend to be of the NMC type lithium that requires 4.2V per cell for full charge. I am currently using a few of these modules but only go no higher than 4.1v per cell to extend the cycle life.

I tend to favour 8 cell or 16 cell modules, as 15 cell ones are difficult to get. My question is what is the highest safe voltage input for Rosie. At 4.1V with 16cells the max voltage will be 65.6V. Will this voltage irreparably harm Rosie. The specs in the manual indicate that it can go up to 68V. What say you Midnite solar engineers/designers.

I am hoping to receive a beta Rosie in the near future, fingers cross. 

Damani