Renogy DC-DC Test Results-UPDATE 4 (Better!)
Updates 23 June--new test with Renogy input exposed for voltage readings Update 25 June more readings Update 4 - 27 June-- fewer amps with fat wire were noted this time! ----- I have the 20 ampe...
Forum Discussion
BFL13 wrote:
The 200AH bank at 50% SOC takes a long time to get up to Vabs at 14.7v. so it only got to 12.9v during the 45 min test with 15-20 amps of charging. If left on for hours and hours it would reach the 14.7 set on the Renogy.
After the test I turned off the Renogy and turned on the 55 amp converter set to 14.7v, which got it all done after a few hours.
This does not sound like an "apples to apples" or at least it is no reason to condemn the Renogy ! It sounds like it would have gotten the job done in the about the same amount of time.
Also remember the Renogy goes through multiple "stages".
Also engine bay heat was climbing so truck voltage was also tapering. Might be related where input voltage got below the range the Renogy can convert (boost).
The cut off voltage is pretty low. Check your manual.
I could pull out the Renogy so I can access the input terminals, but would still need to install the ammeter somehow.
Any ammeter requires a shunt. If you really want to "watch" the Renogy work, buy a remote mount (or wireless) meter. Mount the shunt as close as possible to the battery. (Victron makes good ammeters with additional functions.) Buy an amp-clamp meter if you want measure the current going into the Renogy.
... but I need to run fatter wire to get that as seen in the test.
Review your test results with Renogy before going through that hassle.
