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Battery leakage
I have a 4 of the 100w panels in series and parallel producing 38volt 10a connected to my 60a oyoocyoo charge controller also connected to my gel batteries 2 of the 100ah in parallel then also connected to Hoenjuno pure sine inverter 1500w. I have a dc disconnect between the panel and the charge controller. My problems is after sunset my battery starts to drain. So i found this website and i believe you great people on here can help me.
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Last edited by Potek2Hoenjuno; 07-07-2023, 11:05 PM. -
A fully charged battery is about 12.8 volts. When charging your controller will bring it up over 14 volts, then transition to float mode which would be about 13.6 volts. The battery will settle to 13.6 volts while the sun can keep the current flowing into the battery. Once the sun sets your battery will naturally settle to 12.8 volts approx. It is still full. Obviously, any loads on your battery will start to chip away at that 12.8 volts.2 Kw PV Classic 200, Trace SW 4024 460ah, -
If connected to the battery the inverter will slowly drain it even if there are no loads turned on because the inverter is a load and can lower the battery level below the 12 voltsComment
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SunEagle littleharbor2 Thanks so much i am soo grateful for the advice. I have charged the battery again its 96% on the controller screen and 13.7v also on the controller screen. Verified with my voltmeter i have 13.7v. I have disconnected the panels and have also disconnected the controller. I want to verify that my battery is not self discharging at a very high rate. @ SunEagle all this time my inverter has been off. I am on the grid till till it goes of i stay on the grid.Last edited by Potek2Hoenjuno; 07-09-2023, 07:53 AM.Comment
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So my system is isolated from the grid. Not even an automatic transfer switch involved. I agree with you about inverter using some pf my battery without load but its in an off position.Comment
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Maybe i need a disconnect switch for my batteries so that if after charging i put it off then i use the charged battery in the event of power outageComment
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I have charged the battery again its 96% on the controller screen and 37v also on the controller screen. Verified with my voltmeter i have 37v.
I assumed you had a 12 volt system from the photo of your controller's screen. Now I'm not sure what voltage your system is. 37 volts too high for a 24 volt system and too low for a 48 volt system. Looks like the open circuit voltage of a, 60 cell panel. or the Vmp. of a 72 cell panel.2 Kw PV Classic 200, Trace SW 4024 460ah,Comment
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@ littleHarbor2
Made a mistake I didnt realized what i had typed. I mean 13.7v so i check after a fully charged battery at 13.8v it gradually dropped to 13.1volts. Its stayed like that for hours. I guess my batteries are doing good and that there was no leakage. Charge controller deceived me by telling me my battery was 77% @ 13.1volt.
So what you said was right and perfect. I salute and celebrate youComment
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Thanks for clearing that up. Don't ever trust a voltage based battery meter. You need a shunt based meter that is correctly programmed for your battery size. It will count amps in AND out and give you a reasonably accurate reading of your state of charge.
2 Kw PV Classic 200, Trace SW 4024 460ah,Comment
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Any particular one u want to recommendComment
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I really like my Bogart Tri-Metric meter. The Victron models have nice features like bluetooth but the readout is tiny. I prefer to walk into the equipment room and see the readout on the wall, clear and bright. Click on the photo for a close up view.
Tri Metric..JPG
2 Kw PV Classic 200, Trace SW 4024 460ah,Comment
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littleharbor2
Thanks so much i continue to thank and appreciate you as my guide on a tour in learning solar power system. Thanks so much.Comment
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