FES Batteries SOH

[Alex Holswilder]

I have had a Shark with FES since beginning 2017. The glider has flown over 200 hrs, used less than 3 hrs of FES. Only once or twice used FES for a bit longer retrieve where SOC went down to about 25%. I haven't had any problems with the FES system yet.

Today I checked the SOH of the batteries. Was impressed to see both batteries still at 99.2% SOH.

How is your SOH of your FES batteries keeping up?

Alex

[Jeffrey Banks]

I have 68 cycles. I don’t recall except better than 99% SOH last time I looked

[Scott Manley]

I have 100 flight hours, 4 hours of run time on the motor, not sure how many cycles.  Glider is for sale, so the batteries have been in storage for about 1.3 years at SOC of 65%.  'Just checked batteries for SOC and SOH.  SOH is at 99%.

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