Got the replacements for the multimeters that I destroyed (been in industrial maintenance for 20 years, still can't believe I made such a newbie mistake). So, I'm doing a charge, discharge, charge cycle.
The use of the dual-lamp work light as a discharge load is not my original idea, it came from the website for the really nice grid charger.
The work light has been modified by wiring the lamps in series to survive the high voltage coming from the IMA pack. I considered wiring it as a dual purpose light (discharge load or work light) but thought better of it (see above reference to newbie mistakes). Much safer to have it as just a discharge load.
The photos are from very early in the discharge cycle. The first charge went to 172.2 vdc and stayed there for 2 hours so I considered it done. Total charge time was approximately 20 hours at 260 ma.
The discharge started at 1.8 amps and slowly dropped, ending at 1.3 amps when the voltage reached 132 vdc and I stopped the discharge. For the moment, it's going to be completely manual but I'm working on a few ideas to automate it. The discharge took approximately 2.5 hours, maybe closer to 3. I logged the voltage but not the current during discharge, a more powerful laptop is on the way.
The battery was allowed to rest for a couple of hours with the fan running and then the charge cycle was started.
Feel free to ask any questions, I know I haven't explained it thoroughly here.