Hi Denny.
Your concern for your GM battery is warranted. They are expensive devices and require just a little bit of caution and they will deliver good reliable energy for a long time.
With Lifepo4 batteries, they are not the best at discharging and recharging compared to other types of lithium batteries, the cell has a phosphate protection that does impede the currnet and voltage a little, and a 10ah is a small pack that will not tolerate 10 amps for long cycle charging.
For regen you really need a good pack, either 2 * 10ah packs, or a chemistry, or brand battery that is designed for faster charging and discharging rates.
To get and idea of how much regen is appropriate for a LiFePo4 pack, one should never attempt to slow a vehicle down faster using regen alone than the LiFePo4 battery can accelerate the vehicle in the first place.
Say if it takes 10 seconds to reach top speed at wide open throttle (WOT), if you manage to stop the bike in 5 seconds, this must be generating more than 1c, up to a point where efficiency interferes, like maybe you lose 30% of power in the translation of energy from mechanical to electrical, but Lifepo4 isnt rated as high for charging as it is for discharging. So efficiency losses can be used for some headroom when estimating how much regen torque can be applied safely.
That said, you're more likely to ruin your internal controller with regen before your battery, but some do manage to go through a few controllers before their battery gives up the ghost too.
