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Old 10-21-2018, 10:02 AM   #1
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SOC not 100% on shore power

What should my expectations being reagarding SOC when on shore power? Ours rarely shows 100% and I feel it should. System says charging. Is something wired wrong?
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Old 10-21-2018, 10:05 AM   #2
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What should my expectations being reagarding SOC when on shore power? Ours rarely shows 100% and I feel it should. System says charging. Is something wired wrong?
Where are you reading SOC? What charger do you have and what are the settings for it? What batteries do you have?
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Old 10-21-2018, 10:11 AM   #3
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AGM Batteries, Magnum 2000. Reading SOC from Magnum ME-RC. Charger settings-don't know.
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Old 10-21-2018, 10:16 AM   #4
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The ME-RC isn't always as accurate as it could be. We occasionally see the same thing. I also use battery voltage as an indicator of battery SOC. Between the two, I don't have to obsess about the ME-RC reading. Ive found the SOC indicator usually ends up correct in a day or two.
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Old 10-21-2018, 10:20 AM   #5
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Thanks for giving us peace-of-mind.



Maybe you can anser our other question if you have an EC30.


We took the defaults on the EC30 and we not very happy with them when boondocking. We have changed a few of them but are in the dark, manual doesn't help much. Do you have any idea what the EC30 settings should be?
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Old 10-21-2018, 10:26 AM   #6
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Thanks for giving us peace-of-mind.



Maybe you can anser our other question if you have an EC30.


We took the defaults on the EC30 and we not very happy with them when boondocking. We have changed a few of them but are in the dark, manual doesn't help much. Do you have any idea what the EC30 settings should be?
EC30? Not sure what that is. Can you elaborate?
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Old 10-21-2018, 10:44 AM   #7
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Its the generator controller from Cummins/Onan. If you don't have one that is fine. I need to ask that question and since I had you on this thread I thought I would ask.



I'll start a new thread with the quetion later.
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Old 10-21-2018, 10:56 AM   #8
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Yep. Don't have. Must be a Winne vs Tiffin difference.
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Old 10-21-2018, 11:30 AM   #9
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AGM Batteries, Magnum 2000. Reading SOC from Magnum ME-RC. Charger settings-don't know.
Sue,

With AGM batteries I can almost guarantee your Final Charge setting in the ME-RC remote Setup Menu is set to Multi. With final charge set to Multi the batteries will go through Bulk, Absorb, and then Float charge (if they were low to start with). Once they switch to Float a timer starts and will shut the charger off after a 4 hour period. This can be seen on the Magnum remote as Full Charge. The charger will not switch back on until the Magnum remote sees 12.6v or less. With AGM batteries (which operate at a slightly higher voltage as compared to flooded batteries) this represents about an 88% SOC. The charger will come back on in Float for another 4 hour period and then shut off. Here is where the problem lies. The 4 hour float period at the Float voltage is not putting enough amps back into the batteries to bring them up to 100% SOC. With my previous AGM battery bank I went from 88% to 94%.

This final charge setting works great for flooded batteries which drop very little in terms of SOC prior to the charger turning back on but is terrible for AGM batteries.

Find your final charge setup menu and change Final charge from Multi to Float and your batteries should stay at 100% SOC when on shore power which AGM’s can handle very well.
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Old 10-21-2018, 11:36 AM   #10
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Thanks for giving us peace-of-mind.



Maybe you can anser our other question if you have an EC30.


We took the defaults on the EC30 and we not very happy with them when boondocking. We have changed a few of them but are in the dark, manual doesn't help much. Do you have any idea what the EC30 settings should be?
Sue,

The EC-30 works great for auto starting the generator but leaves a little to be desired for the auto shutdown. I found it was best (with AGM batteries) to have it start at 11.9-12.0v (while under an in use load) and then manually shut it down in a few hours. After shutdown re-arm the auto start. Do this procedure once in the morning and once at night and you should be good.

If you want to experiment with auto shutdown try 14.3v for 30 minutes and see if that helps.
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Old 10-21-2018, 12:58 PM   #11
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We just looked at the Magnum, set for AGM-1. Haven't tried the 14.3+30 yet.
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Old 10-21-2018, 01:24 PM   #12
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We just looked at the Magnum, set for AGM-1. Haven't tried the 14.3+30 yet.
What brand of AGM batteries do you have? The final charge setting is not under battery type, it is further along in the setup menu.
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Old 10-21-2018, 01:39 PM   #13
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We found it and it was multi, thank you for your brilliance. We changed it to Float and will see how it goes.


I assume this is OK for when we are boondocking and on generator also.


Thank you so much.
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Old 10-21-2018, 03:04 PM   #14
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We found it and it was multi, thank you for your brilliance. We changed it to Float and will see how it goes.


I assume this is OK for when we are boondocking and on generator also.


Thank you so much.
Sue,

Absolutely. Final charge can stay there permanently, unless you get a rather large solar array (600 watts or greater).

By the way do you have Lifeline AGM batteries?
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