Using the Industry Standard DC VOLTAGES for charging the deep cycle batteries is discussed here with this Progressive Dynamics point paper... Using a higher DC Voltage will charge faster but you run into the batteries being boiled out of fluids to quick...
This is what PROGRESSIVE Dynamics states in their operating manual on how long it takes to charge a battery using the DC VOLTAGEs listed below:
"Progressive Dynamics ran this test on the amount of time it took a PD9155 (55-amp) converter/charger set to three different output voltages to recharge a 125 AH (Amp Hour) battery after it was fully discharged to 10.5-volts.
14.4-VOLTS (Boost Mode) – Returned the battery to 90% of full charge in approximately 3-hours. The battery reached full charge in approximately 11 hours.
13.6-VOLTS (Normal Mode) – Required 40-hours to return the battery to 90% of full charge and 78-hours to reach full charge.
13.2-VOLTS (Storage Mode) – Required 60-hours to return the battery to 90% of full charge and 100-hours to reach full charge."
This is based on having 17-20AMPS DC current available for each battery in your battery bank... NOTE That Progressive Dynamics doesn't even list using DC Charge Voltages around the 12.0VC range as this would take alot more than 100 hours to achieve a 90% or 100% charge state.
However you come up with these voltages is on you. I like using the smart mode converter/chargers my self...
The beauty of the different settings on the Meanwell Suppies is you can produce exactly what works best for the Trojan Batteries which a bit higher that the standard converter/chargers produce..
In other words it will take around three hours using 14.4VDC with a capacity of 17-20AMPS DC Current per 12VDC battery in your battery bank to recharge your 50% to 90% charge state banks. Four 12VDC batteries in your battery bank will want to demand around 80AMPS DC Current for about 15 minutes or so which will then start tapering back to around 5-6AMPS DC current starting with 14.4VDC for one hour and then dropping back to 13.6VDC for an additional two hours for a total of around three hours time. This is what we usually see with our battery bank camping off-grid at any rate running our 2KW generator powering up the on-board smart mode PD9260C converter/charger unit starting the re-charge when the battery bank is showing around 12.0VDC charge state.
MEX on here is our Meanwell Supplies expert...
Roy Ken
