Two chargers on same battery
I recall BFL (I think it was) saying he could use the Vector 1093 on a battery while it was also being charged, albeit feebly, by the stock converter charger. We dry camped all week, with no solar,...
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Always get the portable smart charger running first, then apply the converter.
I don't try to get the 1093 and the 7355 to work together to add their amps since the 7355 does not add much to the job with its much lower voltage than the 1093's. Instead, I use the battery disconnect and run the rig on the 7355 for 12v stuff while charging the batts with the 1093.
This means there is no draw from the rig subtracting from the charging and making it take longer. eg, say there is a 5 amp draw from the rig. 40 amp charger at 40 amps. Net charging is 35 amps instead of 40.
For multiple chargers on the same battery, you get better results (adding their amps) when the chargers are of similar voltage. You could use two 1093s and get 80 amps that way. I routinely ran four Vector portables on one battery bank to get a total of 130amps in bulk. ( a 40, two 35s, and a 20) 130 was the most the Honda 3000 could do before popping its breaker. ( if I changed the third 35 up from the 20 amp setting to 35, that would blow the Honda)
BTW, the two chargers will not total any more amps than the battery will accept. So if the batt acceptance rate at that voltage is 60, then the two 40s will do 30 each. Or if one charger has a higher voltage than the other, then it might be 40 and 20 say. Then (with two 40s of same voltage) when down to 40, each is doing 20. At that point you might as well yank one charger and the other will bounce back from 20 to 40 and continue on down.
I don't try to get the 1093 and the 7355 to work together to add their amps since the 7355 does not add much to the job with its much lower voltage than the 1093's. Instead, I use the battery disconnect and run the rig on the 7355 for 12v stuff while charging the batts with the 1093.
This means there is no draw from the rig subtracting from the charging and making it take longer. eg, say there is a 5 amp draw from the rig. 40 amp charger at 40 amps. Net charging is 35 amps instead of 40.
For multiple chargers on the same battery, you get better results (adding their amps) when the chargers are of similar voltage. You could use two 1093s and get 80 amps that way. I routinely ran four Vector portables on one battery bank to get a total of 130amps in bulk. ( a 40, two 35s, and a 20) 130 was the most the Honda 3000 could do before popping its breaker. ( if I changed the third 35 up from the 20 amp setting to 35, that would blow the Honda)
BTW, the two chargers will not total any more amps than the battery will accept. So if the batt acceptance rate at that voltage is 60, then the two 40s will do 30 each. Or if one charger has a higher voltage than the other, then it might be 40 and 20 say. Then (with two 40s of same voltage) when down to 40, each is doing 20. At that point you might as well yank one charger and the other will bounce back from 20 to 40 and continue on down.
