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
Watts out = watts in plus overhead and conversion loss.
A DC=DC converter usually is an inverted/charger paired. Power in is chopped into Square wave A/C and then processed. This is about 90% efficient going in and another 10% is lost going out that's best case. Few are that good.
Now.. some interesting things.. Because it's not converting to 60Hz AC but usually a much higher frequency. the processing is easier and if it uses a transformer that's much lighter.. But basically you have an inverter and a converter in one box.
A DC=DC converter usually is an inverted/charger paired. Power in is chopped into Square wave A/C and then processed. This is about 90% efficient going in and another 10% is lost going out that's best case. Few are that good.
Now.. some interesting things.. Because it's not converting to 60Hz AC but usually a much higher frequency. the processing is easier and if it uses a transformer that's much lighter.. But basically you have an inverter and a converter in one box.
