I’m surprised to not see a mention of the SP13 waterproof connectors.
Smaller cleaner, looking, cap built. Sure it’s made of plastic but I’ve never run into any issues (not that I’ve ever smashed my chargeport). But it’s also basically impossible to short the port.
The 2 pin one claims 10 Amps its got slightly larger (1.8mm) pins the multi pinned ones are smaller pins (1mm) and it claims 5amps. I believe that is per pin…
Been charging 12s at 4A for a couple years now no issues.
There is no such thing as a 10 amp DC plug especially at 50 volts. Gx16 is the go to but has to have a water tight can and fuse (60 amp) if charging at 10 amps. I use a 50 amp 12v fuse I charge at 8 amp, I tried the 20 amp use in my other build it got very warm.
GX16 2 and 4 pins have arrived. These will very safely handle the 8 amp charger I just purchased.
I’m also interested in pulling power out this way, or at least what the capabilities are.
Could you plug into the charge port to power something externally and how is the BMS handling that current or is it pass through? We’re never going to exceed 10-15 amps here and likely far less.
If pulling power through the charge wires and BMS is a problem, I could use the 4pin with two pins dedicated to charging and two pins dedicated to a separate fused power supply with a safe 10A cont rating for both. Could easily run a TS100 with an external voltage step down regulator for example off this. Or maybe even a small air pump or other rescue tool someone may find handy.
You want to ideally charge at the recommended charge rate for your pack in the case of 30Q that’s 1.5amp/cell in group. So a 4P pack should ideally change at 6 amps or less they have a fast change rating of 4 amps but this will degrade cells much faster…
My bms is wired as charge only so when my lightbar is on, I actually see it in my app. If I lock the bms, it cuts off the power that my light is pulling
It very much depends on the BMS. Some basically behave like there’s a diode in series with the input, and flat out will not allow current to pass the other way, and some will happily source or sink current in either direction through the charge port.
On my ebike I have a 12v step-down module to provide 40W of power for running the headlight, as well as a USB PD charger and a cigarette lighter port for external accessories, since finding headlights that will tolerate 84v of input is quite difficult.