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Post by jackieblue on Oct 7, 2018 18:22:19 GMT
I have a Rover 40 charge controller/ I currently have 4 batteries (12v lithium) combined in parallel. The batteries died (not sure why, solar may have accidentally gone off, zero load), so I took a 5th 12v battery (lithium) so that I could get the charge controller working and charge the batteries. I have everything working but the controller says the batteries are at 100% SOC. How is this possible considering there are 5 batteries and 4 have zero power? Did all my batteries die at once? Could it be the charge controller? Almost no load on these things as this system is merely back up. I bought these battery used (2 sources) but wouldn't think they would all fail at once. Thanks in advance for any advice.
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Post by tattoo on Oct 7, 2018 18:52:58 GMT
The SOC means nothing forget it's even there.
What is the voltage of each battery separate by itself? Saying they have zero power doesn't tell us anything. If you had one battery to die it could have killed the others.
Unhook them and check the voltage....
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Post by Admin on Oct 7, 2018 21:45:00 GMT
I have a Rover 40 charge controller/ I currently have 4 batteries (12v lithium) combined in parallel. The batteries died (not sure why, solar may have accidentally gone off, zero load), so I took a 5th 12v battery (lithium) so that I could get the charge controller working and charge the batteries. I have everything working but the controller says the batteries are at 100% SOC. How is this possible considering there are 5 batteries and 4 have zero power? Did all my batteries die at once? Could it be the charge controller? Almost no load on these things as this system is merely back up. I bought these battery used (2 sources) but wouldn't think they would all fail at once. Thanks in advance for any advice. Is this the Rover Li? Also what brand are your lithium batteries? -Renogy Team |
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Post by jackieblue on Oct 8, 2018 16:54:26 GMT
The SOC means nothing forget it's even there. What is the voltage of each battery separate by itself? Saying they have zero power doesn't tell us anything. If you had one battery to die it could have killed the others. Unhook them and check the voltage.... Thanks for the response. The voltage is ZERO on all the batteries. Why do you say the SOC means nothing? The charge controller would use this to determine to consider sending charge down, or so I would assume. |
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Post by jackieblue on Oct 8, 2018 16:56:52 GMT
I have a Rover 40 charge controller/ I currently have 4 batteries (12v lithium) combined in parallel. The batteries died (not sure why, solar may have accidentally gone off, zero load), so I took a 5th 12v battery (lithium) so that I could get the charge controller working and charge the batteries. I have everything working but the controller says the batteries are at 100% SOC. How is this possible considering there are 5 batteries and 4 have zero power? Did all my batteries die at once? Could it be the charge controller? Almost no load on these things as this system is merely back up. I bought these battery used (2 sources) but wouldn't think they would all fail at once. Thanks in advance for any advice. Is this the Rover Li? Also what brand are your lithium batteries? -Renogy Team Thanks for the response. It is a Rover 40 charge controller set to Lithium (you can choose other batteries). The batteries are Panasonic 18650 in groups combined in groups of 60 to make a 12v battery. Worked fine for about a year. |
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Post by tattoo on Oct 8, 2018 17:11:02 GMT
Thanks for the response. The voltage is ZERO on all the batteries. Why do you say the SOC means nothing? The charge controller would use this to determine to consider sending charge down, or so I would assume. Believe what you want but it means nothing and is very confusing... Think of this, The SOC is at 100% at the end of the day but when the sun goes down it drops to 60% without a draw, Where does it go? Like I said it's useless... The ONLY thing that matters is voltage...
If your batteries are at zero something has killed them.... You can try and charge them but I would think that's a waste of time they are dead...
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Post by tattoo on Oct 8, 2018 17:20:11 GMT
The batteries are Panasonic 18650 in groups combined in groups of 60 to make a 12v battery. Worked fine for about a year. How long do you think those tiny batteries are going to last? I think you have done well for them to last that long..... |
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Post by jackieblue on Oct 9, 2018 0:38:53 GMT
The batteries are Panasonic 18650 in groups combined in groups of 60 to make a 12v battery. Worked fine for about a year. How long do you think those tiny batteries are going to last? I think you have done well for them to last that long..... Tiny? How is that relevant. I have 240 of them. They are in blocks of 20, in series. Each of those blocks is 4 volts and 20 ah. They are then wired in parallel in blocks of 3. So that is 12 volts, 20ah. I have 80ah at 12 volts, which was only back up for my business computers. It runs my computers and lights for 6 hours a day when my power is out. I don't use them very often. |
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Post by tattoo on Oct 9, 2018 1:58:02 GMT
How long do you think those tiny batteries are going to last? I think you have done well for them to last that long..... Tiny? How is that relevant. I have 240 of them. They are in blocks of 20, in series. Each of those blocks is 4 volts and 20 ah. They are then wired in parallel in blocks of 3. So that is 12 volts, 20ah. I have 80ah at 12 volts, which was only back up for my business computers. It runs my computers and lights for 6 hours a day when my power is out. I don't use them very often. It's relevant because you could buy one battery that would do way more last longer and would be way cheaper than all of those small batteries.... But it's your money... It's time to buy 240 more now... |
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Post by playersz28 on Oct 9, 2018 10:39:12 GMT
The batteries are Panasonic 18650 in groups combined in groups of 60 to make a 12v battery. Worked fine for about a year. How long do you think those tiny batteries are going to last? I think you have done well for them to last that long..... The 18650 is a standard Lithium cell. It's used in Tesla battery packs among other applications. As an individual cell it may be small but they are built into large packs and will last for years under proper maintenance. |
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Post by tattoo on Oct 9, 2018 13:07:08 GMT
The 18650 is a standard Lithium cell. It's used in Tesla battery packs among other applications. As an individual cell it may be small but they are built into large packs and will last for years under proper maintenance. I looked them up with that number and what I seen was a battery that was the size of a AA battery. I have batteries like that in my camera and about a year is all I can get out of them.... But yes the key to any battery is it will last for years under proper maintenance.... |
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Post by Admin on Oct 9, 2018 14:43:52 GMT
The SOC means nothing forget it's even there. What is the voltage of each battery separate by itself? Saying they have zero power doesn't tell us anything. If you had one battery to die it could have killed the others. Unhook them and check the voltage.... Thanks for the response. The voltage is ZERO on all the batteries. Why do you say the SOC means nothing? The charge controller would use this to determine to consider sending charge down, or so I would assume. The SOC% visible on the charge controller’s screen is not a measure of the remaining capacity of the battery, but instead simply uses the voltage going into the battery to determine SOC% at that moment. The charge controller uses the voltage-method, but the reading quickly becomes distorted due to factors like discharge rate, temperature, and loads connected to the battery which “excite” the battery and change the surface charge on the battery. To get the most reliable SOC% for remaining capacity, your batteries must be at rest for 2-3 hours (sometimes longer!) with no load by which you can measure the voltage. |
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Post by Admin on Oct 9, 2018 14:53:25 GMT
I have a Rover 40 charge controller/ I currently have 4 batteries (12v lithium) combined in parallel. The batteries died (not sure why, solar may have accidentally gone off, zero load), so I took a 5th 12v battery (lithium) so that I could get the charge controller working and charge the batteries. I have everything working but the controller says the batteries are at 100% SOC. How is this possible considering there are 5 batteries and 4 have zero power? Did all my batteries die at once? Could it be the charge controller? Almost no load on these things as this system is merely back up. I bought these battery used (2 sources) but wouldn't think they would all fail at once. Thanks in advance for any advice. The Rover's default charge profile for lithium is for 12.8V lithium iron phosphate batteries. You can program the Rover to charge other batteries depending on the manufacturer requirements. It sounds like the batteries you have might be dead, perhaps from improper charging profiles -Renogy Team Attachments:
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