100 amp charging source vs 2 grp31 AGM
My friend plans on running an obscene stereo in his new box on wheels acquisition. He wanted a dedicated power source for it able to power it for a respectable amount of time from battery power alo...
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There will be times when the vehicle is plugged in and the powermax will be powering the electric load, likely at a chosen 13.6v which is the float voltage for these batteries
This powermax was bought for its ability to hold absorption voltage until the batteries together take less than an amp at absorption voltage, which for these batts is 14.7 at 77f.
NO automatic 3/4 stage converters not going to treat these batteries correctly when depleted, nor fully charge them with a truncated absorption phase and lower absorption voltages..
The adjustable voltage powermax on a timer will.
The load test continued for 11 hours, not 10.
Termination voltage was 11.94 at 11 hours. The 3 50 watt bulbs were drawing 10.07 amps at 12.04v.
12.04 was the voltage 2hrs 15 minutes after the load was removed.
Powermax maxed out at 94 amps. The fan kicked on in less than a minute. Much faster and louder than the fan on the 75 amper.
BFL13 thanks for the lid removal warning. Sorry for calling it a boondocker.
When it was made known that our first' 100 amp ' model was not producing more than 75 amps we spoke with Randy who tried to tell me two depleted batteries could not accept more than 75 amps, then Errin at Powermax who did not even try and pass off such malarky.
The 75 amper was mailed back to Florida on my friend's dime. After they got it they had a larger 100 amp automatic model shipped out from somewhere in California, which is not what we ordered. Many more phone calls later a 100 amp adjustable voltage model arrived, and we are now testing it on depleted batteries.
And 94 amps is the maximum output according to my clamp on Ammeter.
The owner already found some large case 200 alternator he plans on adding to the engine, and keeping the current one. not sure which one it is but will try and get details.
About the Northstar31 load test, we did not use the same exact loads as before, and the test ran for 11 hours not 10. the loads were over 10 amps for the whole test, so this load test is not directly comparable to the last test, and the rested voltage at 11 hours at 10+ amps indicates the depletion was some percentage below 50%.
Their last recharge was 75 amps split between 2 group31s, and going by Odyssey's minimum 0.4C recommendation, these Northstars were under that level.
Northstar does not make specific minimum amperage recommendations in an easy to understand format like 0.4c, but given all the similarity to Odyssey in claims and construction I'll use Odysseys parameters without worry.
Now they are getting more than that 0.4C and should be happier for it.
Got to go back down and see when amps begin to taper.
This powermax was bought for its ability to hold absorption voltage until the batteries together take less than an amp at absorption voltage, which for these batts is 14.7 at 77f.
NO automatic 3/4 stage converters not going to treat these batteries correctly when depleted, nor fully charge them with a truncated absorption phase and lower absorption voltages..
The adjustable voltage powermax on a timer will.
The load test continued for 11 hours, not 10.
Termination voltage was 11.94 at 11 hours. The 3 50 watt bulbs were drawing 10.07 amps at 12.04v.
12.04 was the voltage 2hrs 15 minutes after the load was removed.
Powermax maxed out at 94 amps. The fan kicked on in less than a minute. Much faster and louder than the fan on the 75 amper.
BFL13 thanks for the lid removal warning. Sorry for calling it a boondocker.
When it was made known that our first' 100 amp ' model was not producing more than 75 amps we spoke with Randy who tried to tell me two depleted batteries could not accept more than 75 amps, then Errin at Powermax who did not even try and pass off such malarky.
The 75 amper was mailed back to Florida on my friend's dime. After they got it they had a larger 100 amp automatic model shipped out from somewhere in California, which is not what we ordered. Many more phone calls later a 100 amp adjustable voltage model arrived, and we are now testing it on depleted batteries.
And 94 amps is the maximum output according to my clamp on Ammeter.
The owner already found some large case 200 alternator he plans on adding to the engine, and keeping the current one. not sure which one it is but will try and get details.
About the Northstar31 load test, we did not use the same exact loads as before, and the test ran for 11 hours not 10. the loads were over 10 amps for the whole test, so this load test is not directly comparable to the last test, and the rested voltage at 11 hours at 10+ amps indicates the depletion was some percentage below 50%.
Their last recharge was 75 amps split between 2 group31s, and going by Odyssey's minimum 0.4C recommendation, these Northstars were under that level.
Northstar does not make specific minimum amperage recommendations in an easy to understand format like 0.4c, but given all the similarity to Odyssey in claims and construction I'll use Odysseys parameters without worry.
Now they are getting more than that 0.4C and should be happier for it.
Got to go back down and see when amps begin to taper.
