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05-26-2014, 10:39 AM
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#22
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Member
Join Date: Nov 2012
Location: Forks, Washington
Trailer: Working on my build list
Posts: 93
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Jamman is right, something is not adding up here. Check how you are measuring. To make accurate voltage measurements you can't have current going in or out of the batteries. You also need to rest them before measuring.
If you are measuring after a couple of hours in the sun then I assume the sun is still up. Are you disconnecting the charger before measuring? If the charger is still plugged in and working you might be measuring the voltage output from the charger not what is in the battery.
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05-26-2014, 11:21 AM
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#23
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Senior Member
Join Date: Feb 2013
Location: Solvang, California
Trailer: 2016 21' Escape (usetaowna a 19, a Burro and 2 Casitas)
Posts: 842
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Agree. Doesn't add up, must be my inverter is sucking too much juice from the batteries. No, I'm not reading the voltmeter while charging (duh!). Thanks all. Great thread on solar.
Greg
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05-26-2014, 11:29 AM
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#24
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Senior Member
Join Date: Feb 2010
Location: Oswego, New York
Trailer: 2017 Escape 21C, 2018 Ford F150
Posts: 5,370
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As I've mentioned in other posts, until I installed an amp hour based battery monitor (a TriMetric 2025), I thought the battery charge per cent measurement provided by the GoPower solar controller was accurate. After setting up the TriMetric, I discovered that my batteries would sometimes be down as much as 25 amp hours while the solar controller showed 100% (as did the lights on the built in monitoring panel).
A voltage measurement (which is what the solar controller does) has too many variables to be accurate. Either a real battery monitor that shows amp hours in/out or measuring the specific gravity of the cells is the only accurate way to know the condition of your batteries.
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05-26-2014, 05:21 PM
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#25
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Senior Member
Join Date: Jul 2013
Location: Peru, New York
Trailer: 2014 19' hatch date Feb. 27
Posts: 123
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Quote:
Originally Posted by LarryandLiz
Couldn't find them. I don't have much luck using the search function on this software.
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Use the the search site/google,the the other search I've found to be less useful
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05-26-2014, 05:34 PM
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#26
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Senior Member
Join Date: Oct 2008
Location: North Vancouver, British Columbia
Trailer: 2009 Escape 17B 2020 Toyota Highlander XLE
Posts: 17,136
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See attached.
__________________
What happens to the hole when the cheese is gone?
- Bertolt Brecht
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05-27-2014, 08:24 AM
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#27
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Senior Member
Join Date: Sep 2013
Location: Maple Ridge, BC, British Columbia
Trailer: 2014 17B;2012 Nissan Frontier SV 4
Posts: 701
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Thanks for the info re searching. This makes a huge difference and the old forum threads much more accessible
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05-27-2014, 11:56 PM
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#28
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Senior Member
Join Date: Feb 2013
Location: Solvang, California
Trailer: 2016 21' Escape (usetaowna a 19, a Burro and 2 Casitas)
Posts: 842
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Back to the inverter question, if I were to buy a better inverter, how is it installed? Just wire it to two 12v wires or do a new circuit off the panel?
Greg
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05-28-2014, 03:31 AM
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#29
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Senior Member
Join Date: Jun 2010
Location: Central, Pennsylvania
Trailer: Escape#5 2022 E19
Posts: 26,268
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I believe inverters are best wired direct to your battery as that is the source of power.
__________________
Jim
Sometime life gets in the way of living.......
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05-28-2014, 08:26 AM
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#30
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Senior Member
Join Date: Aug 2012
Location: N/A, Indiana
Trailer: Escape
Posts: 976
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__________________
"Never argue with an idiot. They only bring you down to their level and beat you with experience." George Carlin
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