chrisski
Solar Boondocker
- Joined
- Aug 14, 2020
- Messages
- 5,088
I appreciate the review. I am thinking of using those outlets on a 24 volt run with 12/2 low voltage DC chord.got the outlets linked above by @Symbioquine. I like that I can replace them with a plain CLA port in the same hole if they die. They are rated 36W on A and 60W on C -- but only if powered from a 24V source. My house battery is 24V so this is ok for me. They do glow blue while connected to power, so I'll be putting them on switches. I get 5.87mA @ 24V and 6.70mA @ 12V for the standby draw.
Bench testing bears out the specs. I powered the adapter from my bench PSU, set at 24.0V and 12.0V to test. Obviously the measurements are from the supply side of the adapter so the actual charge rates were less due to conversion efficiency.
Charging my GF's macbook from 50% battery with 24.0V input to the adapter drew around 2.4A. So that's ~57W, and Apple System Profile reports 65W. A while later when battery was up to 80% the draw was 1.6A (~38W) and System Profile still reported 65W after refreshing. The macbook got up to 100% in under an hour and the adapter was only barely warm.
Powering from 12V instead, the adapter drew 2.9A and System Profile reported 36W. But again, as the charge current tapered down to 1.5A the MacBook still reported 36W. So, I suspect that Apple's System Profile just tells you the negotiated charge rate not actual...The Amazon listing for the USB adapter says the charge rate reduces to 27W on both ports when powered from 12V -- I'm not sure what to make of that
Manufacture rating of the wire is 20 amps 150 volts. That thicker wire will allow a future upgrade to one a new adapter of the more obscure higher amperage USB-c protocols you mentioned if a plug becomes available.