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Author Topic: Batteries  (Read 13535 times)

Ned

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Re: Batteries
« Reply #30 on: August 06, 2007, 04:36:05 PM »
The biggest difference in flooded and AGM battery charging profiles is the float for AGMs is about .2V lower than for flooded cells.  I used to adjust the ambient temperature setting on my Heart to compensate before I got a new Link 1000 with the AGM profile.  The difference in equalizing is AGMs are equalized at ~15V for a shorter period than flooded cells, which are done at ~16V for up to 8 hours.  If I would ever equalize my AGMs, I wouldn't leave it on for more than 4 hours.
-- Ned -- Fulltimer 1997-2013
1997 Holiday Rambler Endeavor LE
2007 GMC Canyon

bsberry99

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Re: Batteries
« Reply #31 on: August 06, 2007, 08:21:16 PM »
As far as equalization, the Charge Wizard does it for 15 minutes every 21 hours.  I am hoping this is not a problem on the AGM's.  Comparing the sites, AGM's should be charged:
3 Stage Chargers
Bulk 14.2 - 14.4 volts
Acceptance 14.2 - 14.4 volts
Float 13.2 - 13.3 volts

The charge wizard charges at:
14.4-VOLTS (Boost Mode)
13.6-VOLTS (Normal Mode)
13.2-VOLTS (Storage Mode)

These numbers seems to be within tolerance of each other.
In addition the Equalize mode is 14.4 volts for 15 minutes on a fully charged battery, while lifeline calls for 15.5 volts for 8 hourson a fully charged battery. So this should not create a problem of overcharging.  Although I will not be able to Equalize with the Wizard, I think i can use the Solar Panel Controller if needed.(It has a Equalize mode)

Bob
2006 Host Yukon w/Tent, 2006 F350 PSD, DWD, Airbags

Ned

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Re: Batteries
« Reply #32 on: August 06, 2007, 08:28:34 PM »
Actually, bulk mode is a constant current mode where the charger puts out its maximum rated charging current until the voltage rises to a predefined level, typically typically 14.4V for flooded or AGM cells.  Then it goes into acceptance mode which is a constant voltage mode, typically 14.4V, until the charging current falls to a predefined level, typically 2% of the battery capacity.  Then it goes into float mode where the voltage is dependent on the charging profile, flooded, AGM, or gel; ~13.5V for flooded and 13.2-13.3V for AGM.  This is from the Heart inverter manual.
-- Ned -- Fulltimer 1997-2013
1997 Holiday Rambler Endeavor LE
2007 GMC Canyon

 

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