bigfootford
Fair Oaks, California
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Joined: 12/03/2002
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Following the thread and would like to know what the resolution was.
I too am getting ready to do the FWC/AGM conversion to Lith batt's.
Glad you got it resolved.
Jim.
2000 2500 9.6 Bigfoot,94 F250, Vision 19.5, Mich 245/70XDS2's, Bilstein shocks, air bags/pump, EU2000, PD 9260,Lifeline 100ah, 200W. solar, Morningstar Sunsaver 15A/ display panel, Trimetric, Delorme/laptop, Holux gps rec,led lights, Wave-3 heat.
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Golden_HVAC
Fairview OR, USA
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Joined: 08/19/2003
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Many of the MPPT charge controllers are designed to have several panels in series, hopefully they are the same watt rating panels? So one I have now is rated at 150 to 450 volts input, and I have 2 KW of 250 watt panels for my house, and the plan is 8 each 33 volt in series, and 8 amps. Output can be 48 volts in my case, or 12 volts in your case.
I would check the panels and charge controller input limits, and see if you could wire them in series, there will be less voltage drop into the charge controller. It seems to be working normally. Your RV is drawing about 1.8 amps to run things like the LP detector, refrigerator, and so on. The battery is getting about 2 amps, the RV is using 2 amps, the total of the solar output is about 2 amps because the battery is mostly full.
Now if your battery was reaching 12 volts or less by morning, then ask what is wrong. If it is 12.5 volts, everything is fine.
If you use more than about 50% of your battery power each night, then I would expect it to stay in the absorption charge rate for a few hours each morning. But if you only use 25%, then it will quickly top off the battery, like what you are seeing.
I think everything is fine.
Fred.
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CA Traveler
The Western States
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Joined: 01/03/2004
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Her controller is 100V and I don't recall the panel Voc being stated so series connection may or may not be possible. Use Voc and not Vmp for the input voltage calculation.
My 3 panel Voc is about 120V and the controller is 150V. Serial panels with bypass diodes are a winner!
2009 Holiday Rambler 42' Scepter with ISL 400 Cummins
750 Watts Solar Morningstar MPPT 60 Controller
2014 Grand Cherokee Overland
Bob
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jaycocreek
Idaho
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Joined: 12/28/2013
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Interesting,I will have to look on my Victron controllers for that dial switch I don't remember seeing...Even so,the #7 setting would change to whatever setting that is set in the app..As to the opp..Each battery brand I have,has a somewhat different resting voltage and for one set,13.2+ is the norm..
Victron wrote:Default settings for LiFePO4 batteries
The default absorption voltage is to 14.2V (28.4V, 56.8V) and the absorption time is fixed and set to 2 hours. The float voltage is set at 13.5V (27V, 54V). Equalization is disabled. The tail current is set to 0A, this so that the full absorption time is available for cell balancing. The temperature compensation is disabled and the low temperature cut off is set to 5. These settings are the recommended settings for LiFePO4 batteries, but they can be adjusted if the battery manufacturer specifications advise otherwise.
The Victron default 2 hour absorption time seems excessive for daily charging so the smart app gives the option to change the settings to whatever is best for your particular battery which differs between brands.
Lance 9.6
400 watts solar mounted/200 watts portable
500ah Lifep04
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Y-Guy
Tri-Cities, WA
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Joined: 03/04/2002
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OP has said it's fixed. Closing this thread off.
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