It’s gone pretty quiet around here as we wait for Batch 2 to be delivered. So quiet, that we will soon be telling Knock Knock jokes to pass the time…
Given this, I thought I’d reserve a little corner to document the build progress.
May I present my charging system! Yeah. I know. Not as exciting as flight video’s but still a crucial part of the openPPG ecosystem
I’ve mounted my chargers and power supply inside a semi- ruggedised case for ease of transport. It also means I don’t need to dedicate permanent bench space in my shed for charging. Just pull it all out when needed or throw it in the car when going out on safari.
Here’s what it looks like when being used in anger.
At full power, it will charge all 4 batteries in 2 hours. Today was it’s first full power run while I was on smoke guard. I cycled the batteries up and back down to storage and all seemed to go OK
I also decided to re-terminate the batteries with different connectors. Not that there is anything wrong with the XT150’s they come with but I believe there is better out there.
The chosen RC Pro Plus snap-lock together and are spec’d for higher current loads.
I drew the line at replacing the 10AWG battery wire with heavier duty 8AWG. Open LiPo surgery makes me nervous and I’ll see how these guys cope in real life conditions before going that next step
There was a surprising amount of work creating all the parallel charge / balance leads and fabricating the aluminium brackets to screw the hardware into the case but so far, I’m pretty happy with the result
Chargers: Hyperion Eos capable of 20Amp charge at 6S. Had one for last 7 years. Bullet-proof performance in compact form factor and added a second just because I could and got it cheap.
Power Supply: generic 50 Amp, 30 volt jobbie in bling red! Will see how it stands up to full power runs from both chargers sucking on it.
Connectors and wire: Rc Pro Plus from Hobbyking global warehouse and 12AWG wire for dual, parallel charge harnesses.
I look forward to adding more to this thread in the coming weeks…