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Old 06-18-2016, 07:46 AM   #11
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So i hooked up both panels this morning.

9:30 am, panels flat, 18.9 volts coming from the panels, 14.9 volts leaving controller, battery monitor reading 14.85 volts. I measured 15ish amps from the panels before my meter leads got hot. Guess that I should have noticed that it was a 10 amp max meter before I used it.

So as I was looking at my battery monitor, I noticed that I can hear the batteries bubbling. Thinking that it isn't right, is disconnected my panels. The noise stopped. Should I be getting a bubbling should from my batteries?
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Old 06-18-2016, 09:14 AM   #12
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Sounds to me like it's in "equalize"
According to your units specs 14.8v is the equalize mantainance voltage and it happens every 28 days.
Maybe it starts on day one?
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Old 06-18-2016, 10:03 AM   #13
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That's what I was thinking.

The bubbling I heard in the batteries concerned me. I don't want to screw up $300+ in batteries......

I changed the controller setting for agm batteries and the bubbling was a whole lot less.

I need a better meter hand held meter.
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Old 06-18-2016, 10:14 AM   #14
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Quote:
Originally Posted by klassic View Post
Sounds to me like it's in "equalize"
According to your units specs 14.8v is the equalize mantainance voltage and it happens every 28 days.
Maybe it starts on day one?
Actually, looking again, 14.8 volts is boost voltage for flooded batteries. Equalization shows 15.4 in the manual.

Anyone else notice bubbling in the batteries during boost charging? Anything to worry about?
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Old 06-18-2016, 12:42 PM   #15
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OK. I'll bite. Watching this thread because I'm just intelligent enough to learn by watching others. I'm not one of those who has to pee on the electrified fence for myself to figure things out, LOL!
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Old 06-18-2016, 12:43 PM   #16
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My Morningstar mppt is equalizing right now and the Trojans are bubbling away at 15.2v

When I was hooked to a smart charger during the winter it kept charging at 14.8 for days and the batteries were bubbling the whole time
It never went down from 14.8 and they never stopped bubbling. So I disposed of it.
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Old 06-18-2016, 03:24 PM   #17
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The charge controller is finished equalizing and voltage is now 14.35 and they are still bubbling. So I guess your ok Cdash.

I don't understand though why it would equalize for over an hour and then drop back to absorption.
The batteries have been bubbling for most of the day.
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Old 06-18-2016, 03:34 PM   #18
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I hope you get it all figured out klassic!
Then you can let all of us know what we need to do. I know nothing about solar, but am very interested in it.
Keep up the good work!

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Old 06-19-2016, 11:04 AM   #19
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I like your thinking. I too spent considerable time planning a solar install for our trailer. We recently got back home after a two month holiday in California. The campgrounds all had power but I kept track of the times our trailer would have benifited from solar had there been no power. Most of the time the trailer roof was partially covered by tree shade. This has made me think that even at state or provincial parks how many times will you be able to benifit from a system installed on your roof. I think your idea of being able to place a couple of panels out in the sun and having a small generator for back up is the best solution.
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Old 06-19-2016, 12:51 PM   #20
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I think you're right Murphie. A small generator for back up would be a benefit with low to medium solar setups.
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