Renogy 20A dc to DC report
Hi All, Regarding the Renogy 20A DC to DC Battery Charger 12V, the unit puts out 20 amps, but draws 30 amps when doing so. This is the result of bench testing.
Forum Discussion
pianotuna wrote:Yup, it's surprising how much load some things can take and continue to work.
otrfun,
Back when I first had a 2500 watt inverter, I'd often run the water heater on electric. I monitored voltage when doing so and when it reached 12.2 I'd shut down and allow the battery bank to recover. I found I could sustain a 1:3 where I'd run the heater for 20 minutes and then leave it off for 40 minutes.
I'm still on the OEM alternator.
I've always been a big fan of making lots of voltage and current measurements. Reducing voltage drops and maximizing efficiency & current transfer between components is a pet peeve of mine. If possible, try to go one cable larger than needed with every install. When dealing with 12v DC circuits, I strive for 1% voltage drop under maximum load. In a pinch, I will occasionally accept 2%. Many of the installs I've seen through the years have 5 to 10% drops. Yup, they "work", but not well, or to specs.
