โJun-22-2021 11:13 AM
โJul-02-2021 06:29 AM
โJul-01-2021 06:10 PM
S Davis wrote:
So I just retook the readings for my 50 amp Redarc
Batteries at 80% 12.5 +-
13.8 volts truck idling
28 amp draw at under hood breaker
25โ 1/0 DLO both positive and negative to Redarc
13.6 volts into Redarc
14.4 volts out to batteries @ 24 amps
โJul-01-2021 03:20 PM
โJul-01-2021 02:53 PM
โJul-01-2021 01:54 PM
โJul-01-2021 01:03 PM
โJul-01-2021 12:53 PM
โJul-01-2021 12:15 PM
S Davis wrote:
So I just retook the readings for my 50 amp Redarc
Batteries at 80% 12.5 +-
13.8 volts truck idling
28 amp draw at under hood breaker
25โ 1/0 DLO both positive and negative to Redarc
13.6 volts into Redarc
14.4 volts out to batteries @ 24 amps
โJul-01-2021 11:59 AM
โJun-30-2021 10:24 AM
noteven wrote:
You guys are connecting the DC-DC supply cables directly to the starting battery on the vehicle with a fused connection at the battery, right?
I was thinking size large booster cables would make a good conductor.
Marine grade trolling motor 3 pole connectors would be convenient for the cables and the signal wire... these connectors are not that cheep...
โJun-29-2021 03:42 PM
โJun-29-2021 03:24 PM
otrfun wrote:StirCrazy wrote:You mentioned in a previous post you wanted to keep your voltage drop down to less than 1%. 1% for our install (23 ft.) would have required 4/0 cable. We're experiencing a ~2.5% voltage drop using 2 gauge cable (~10% overall conversion loss w/40a Renogy). For our install, 2 gauge provided us max. bang for the buck (cost, installation hassle, voltage drop, etc). If our install had required a ~30 ft. cable run, like many 5r/TT installs require, we'd probably bumped up to a 1 gauge cable to keep our conversion loss at <=10%.
thats what I wanted to see. do you think there would be any benifit of going larger than 2ga or do you think at that point its not worth the extra money?
Steve
That's just our preference. Nothing wrong with going with an extremely low or high (<=50%) conversion loss as long as you understand the implications.
Hope this helps.
โJun-27-2021 09:56 AM
โJun-27-2021 09:45 AM
BFL13 wrote:Charge current remained steady at 40a for nearly the entire charge cycle; however, the charge voltage steadily increased from ~13.7v to ~14.4v as the LifePo4 charged from 15% SOC to ~97% SOC. I didn't take current readings at the Renogy input when charge voltage approached 14.4v. Odds are the Renogy's input current starting going up slightly once the Renogy's output charge voltage exceeded the alternator's 14.1v output voltage.
. . .
otrfun got 13.8 x 42.2 = 582w in and 40 x ? 13.4 ? = 536 out = 92% . . .