Powermax 75 amp converter/charger
I am charging a pair of Trojan T-105 batteries, they were drawn down to 12.38 or 6.19 per battery which should be about a 30 percent discharge. The powermax is only putting out about 13 amps @ 14.68 v...
Forum Discussion
The unit is rated to lowest voltage at 13v, so the OP at 12.68 is odd.
Another thing to check is that the input voltage is above 105v loaded voltage to get the best results.
You can see lower amps than what the converter is putting out if there is another load on. EG, my 75 amper will show 75 amps to the battery on Trimetric monitor and when the furnace comes on that shows now as 68 amps on the Trimetric. The furnace gets the first 7 amps, leaving 68 for the battery. When the furnace cycles off, the Tri shows 75 amps again.
EDIT--you set the converter to 14.8 and when charging it will show less than that at first, but gradually rise to 14.8 . You will not see 14.8 until the batteries are full and no amps flowing. the amps make the voltage drop until then.
The 14.8 is for 25C/77F so if it is colder out, set that voltage higher or if hotter out, set it lower. there are temp comp tables for that. EG at 35F set it to 15.2 in order to be equivalent to 14.8 at 77F.
If amps are only 13 amps and tapering from there, it could mean the batteries were higher in charge than you thought at first. But then their voltage would have been higher. You need an hydrometer to get the truth here. Always believe the hydrometer if the voltage doesn't match. Then find out what's making the voltage funny.
Another thing to check is that the input voltage is above 105v loaded voltage to get the best results.
You can see lower amps than what the converter is putting out if there is another load on. EG, my 75 amper will show 75 amps to the battery on Trimetric monitor and when the furnace comes on that shows now as 68 amps on the Trimetric. The furnace gets the first 7 amps, leaving 68 for the battery. When the furnace cycles off, the Tri shows 75 amps again.
EDIT--you set the converter to 14.8 and when charging it will show less than that at first, but gradually rise to 14.8 . You will not see 14.8 until the batteries are full and no amps flowing. the amps make the voltage drop until then.
The 14.8 is for 25C/77F so if it is colder out, set that voltage higher or if hotter out, set it lower. there are temp comp tables for that. EG at 35F set it to 15.2 in order to be equivalent to 14.8 at 77F.
If amps are only 13 amps and tapering from there, it could mean the batteries were higher in charge than you thought at first. But then their voltage would have been higher. You need an hydrometer to get the truth here. Always believe the hydrometer if the voltage doesn't match. Then find out what's making the voltage funny.
