Trailer Battery Load Support
As a followup to my recent discussion about my newly acquired CTEK Multi US 7002 Charger I'd be interested in some further input on the subject of trailer battery load support. :) First, I should c...
Forum Discussion
Good questions bfl13.
No answers from me, the tellycom UPS batteries are an unknown. Is anybody here cycling just one and able to put a 60 to 75 amp load on it and report the voltage sag?
Performing precise experiments on my NS AGM-27 will be difficult as It is in use always, powering lights fridge and fans, but I can apply upto 800 watts of load through my underwired ( for 800 watts) MSW inverter in addition to any other normal house loads. I guess I could use my router speed controller to dial in an amperage on a 12 amp power tool.
It does have about 450 to 500 deep cycles on it too and would not perform as well as a new battery.
I believe the higher CCA cycleable thin plate pure lead AGMS of Northstar and Odyssey stand the best chance of maintaining high enough voltage as a single battery to support Soundguy's proposed loading/usage
But they should get the high amp recharge too, Perhaps without it they will perform no better than a lesser AGM, and the 7 amp Ctek is by no means going to meet the 40 amp charge rate recommended by Odyssey for their group31.
I think there is a difference between the appearance of full charge on an AGM (Amps accepted at absorption voltage), and actual maximum energy density, with the high amp recharge being the delineating factor.
I have witnessed this many times on my Northstar. The first engine start after a high amp recharge spins my starter motor so much faster compared to when my solar 200 watts of solar holds 14.5v until amps taper to 0.4. Likewise during an over night depletion of 40 to 55AH the voltage held is higher after the high amp recharge, compared to 200 watts of solar tapering amps to 0.4 at 14.5v before late afternoon.
While Lifeline says 0.5 amps per 100Ah of capacity I read on the marine forum that Northstar,Odyssey and East penn agm say 0.3 amps per 100Ah as the indicator for full. I was using 0.5a per 100Ah on my Northstar have changed solar settings to this, which basically adds another 45 minutes to the absorption stage.
Amps on my NS will basically taper to somewhere under 0.05 at any voltage between 13.6v and 15v, when held there long enough.
Wonder if we can collect some valid data for comparisons between different AGMS as to voltage held under high loads.
No answers from me, the tellycom UPS batteries are an unknown. Is anybody here cycling just one and able to put a 60 to 75 amp load on it and report the voltage sag?
Performing precise experiments on my NS AGM-27 will be difficult as It is in use always, powering lights fridge and fans, but I can apply upto 800 watts of load through my underwired ( for 800 watts) MSW inverter in addition to any other normal house loads. I guess I could use my router speed controller to dial in an amperage on a 12 amp power tool.
It does have about 450 to 500 deep cycles on it too and would not perform as well as a new battery.
I believe the higher CCA cycleable thin plate pure lead AGMS of Northstar and Odyssey stand the best chance of maintaining high enough voltage as a single battery to support Soundguy's proposed loading/usage
But they should get the high amp recharge too, Perhaps without it they will perform no better than a lesser AGM, and the 7 amp Ctek is by no means going to meet the 40 amp charge rate recommended by Odyssey for their group31.
I think there is a difference between the appearance of full charge on an AGM (Amps accepted at absorption voltage), and actual maximum energy density, with the high amp recharge being the delineating factor.
I have witnessed this many times on my Northstar. The first engine start after a high amp recharge spins my starter motor so much faster compared to when my solar 200 watts of solar holds 14.5v until amps taper to 0.4. Likewise during an over night depletion of 40 to 55AH the voltage held is higher after the high amp recharge, compared to 200 watts of solar tapering amps to 0.4 at 14.5v before late afternoon.
While Lifeline says 0.5 amps per 100Ah of capacity I read on the marine forum that Northstar,Odyssey and East penn agm say 0.3 amps per 100Ah as the indicator for full. I was using 0.5a per 100Ah on my Northstar have changed solar settings to this, which basically adds another 45 minutes to the absorption stage.
Amps on my NS will basically taper to somewhere under 0.05 at any voltage between 13.6v and 15v, when held there long enough.
Wonder if we can collect some valid data for comparisons between different AGMS as to voltage held under high loads.
