jimmy
Solar Lover
Posts: 52 
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Post by jimmy on Jan 12, 2018 5:58:07 GMT -8
The controller showed I reached 29.4v today.Yes trouble getting accurate soc. Sundown solar off 25.8--6:30 (9:30 Pm after use before bed 25.28) (Morning before light 24.9) I remember when I took the 4/17 battery up for testing he was surprised at the mca at 1025 it is only supposed to be 845. This morning I switched out the one 4/17 battery with my pampered rv battery same date. Doubt it will make a difference. My multi meter shows only .06 less than controller. So is my controller charging my batteries too high or do I have weird batteries? Should I shut of inverter let batteries charge fully during the day wait till dark use that reading as 100% then back down the numbers to estimate soc? Create my own chart.
By the way its a frigidare incase your interested in getting one.
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Post by tattoo on Jan 12, 2018 6:18:28 GMT -8
Why are you so fixed on the SOC?  As long as you keep worrying about it you will never have your solar running right.... What kind of hydrometer did you buy??? 845 is DEAD 1025 is weak... 1250 and up is fully charged... You don't have weird batteries you have mismatched batteries... I told you not to use that old battery... |
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jimmy
Solar Lover
Posts: 52
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Post by jimmy on Jan 12, 2018 16:01:47 GMT -8
The batteries are rated 845 cold cranking amps(CCA). They call it (mca) standing for marine cranking amps just to mix things up. I am adding 2 more batteries tomorrow. I am fixated on soc because want to be able to tell when my batteries are at 50% to cut back usage and make the batteries last longer. The battery is only 8 months old in good condition. How do my batteries get to 25.8 with no sun? 25.46 is supposed to be fully charged.
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Post by tattoo on Jan 12, 2018 17:08:22 GMT -8
The batteries are rated 845 cold cranking amps(CCA). Jimmy I'm going to say this about that.... CCA doesn't mean S H I T in a solar system.... Why do you think your batteries are in good condition? What does your Hydrometer say that's the ONLY real way to know for sure... I'm done helping you, you don't understand and your not listening to bird or I about solar systems... Have a good one and good luck, Hope you can figure out SOC when it doesn't tell you s h i t .... Your looking for the 50% in the wrong place... I know where it is but I'm not telling... {KISS} See ya in the funny papers |
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Post by rabird on Jan 13, 2018 4:26:14 GMT -8
CCA is different from MCA, CCA is cold cranking amps @ 0F while MCA is the same test but at 32F and should be higher.
Most often on quality deep cycle batteries these specs are not given and generally lower than starting batteries.
You did not answer what voltage under no load would be ~50%, so I will attempt to spoon feed ya, ~24.4v (no load)
after bed you were near 100%, in the morning ~70%.
Battery capacity is for storage to be used later.
Don't let surface charge fool ya, if ya don't now what it is look it up, this is a solar forum and maybe you should check out battery care info.
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Post by tattoo on Jan 13, 2018 6:31:05 GMT -8
^^^ Thank you bird^^^^ But I really doubt he will understand that...
Jimmy 50% has to do with voltage not SOC... If you will do some research there is a chart that tells you that... I have one printed out that I have taped to the wall where my solar is... Even though I know it now.. {KISS}
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Post by rabird on Jan 13, 2018 7:01:04 GMT -8
here the voltage/soc for 'marine deep cycle' their chemistry can be different than 6v golf car batts. So your morning reading might be higher than 70%. Note: Estimate, approximation, 'only estimates', ...  |
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Post by tattoo on Jan 13, 2018 13:29:49 GMT -8
^^^^ Yes sir that is differen't than 6v deep cycle^^^^ Plus the chart I found brakes it down ever further... I think it's in the 60a Renogy CC instruction manual that I bought...
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Post by jsb2000 on Jan 14, 2018 12:46:00 GMT -8
^^^^ Yes sir that is differen't than 6v deep cycle^^^^ Plus the chart I found brakes it down ever further... I think it's in the 60a Renogy CC instruction manual that I bought... Nice find, Tattoo! I grabbed that to replace the wall chart I'm using now (It's a bit faded from being up for so long.) Here it is so that others may benefit from it:  |
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Post by tattoo on Jan 14, 2018 13:41:48 GMT -8
^^^^ Yes sir that is differen't than 6v deep cycle^^^^ Plus the chart I found brakes it down ever further... I think it's in the 60a Renogy CC instruction manual that I bought... Nice find, Tattoo! I grabbed that to replace the wall chart I'm using now (It's a bit faded from being up for so long.) Here it is so that others may benefit from it: That's the best one that I have seen... Thanks for posting it... |
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As long as you keep worrying about it you will never have your solar running right....
