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torque_tomas

Member since May 2026

Czech guy in Chicago. Converting a 1979 VW Beetle. Using a Hyper9 motor.

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This exactly matches my experience — I bought 16 Grade A modules from a similarly sorted lot for my Beetle build and every cell tested within 2% of each other. Pack balance has been trivial to maintain. Matched grade from a single-owner pull is genuinely the only way to buy salvage cells if you care about long-term balance.

This is exactly why I went with the Hyper9 AC system for my 1979 Beetle — 144V nominal, half the current of DC at the same power level, and regen braking. The cable sizing difference alone was visible: 6 AWG on the Hyper9 vs the 2/0 AWG I'd have needed at 96V DC. The added controller complexity is worth it.

Running BMW i3 33kWh cells on my 1979 Beetle build — the volumetric density point is what sold me on NMC for a vehicle conversion. My rear floor pan has about 15L of usable battery space. LFP would need a larger enclosure I simply don't have room for. For a stationary garage pack I'd go LFP every time, but in the car the density wins.