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I am using 24v 30A chargers from BigBattery.com - https://bigbattery.com/product/24v-30a-dc-charger/. I split the packs and use these to charge to 29.2v. Its not 30v but its the fastest thing I have found for less than $150. Remember Will's DIYSOLAR coupon code for an additional 10% off.

I picked up 6 of the LTO packs that Greentec Auto was selling. I originally paired it with a PIP-LV3048 MPP all in one solution but that failed after 2 weeks under some normal charge/discharge testing scenarios. Now I have it set up for 24v system 12s12p and it seems to be working well. So...