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Post by tattoo on Aug 30, 2018 20:25:35 GMT
Ok on 8 100w panels 4 and 4 in series and them in parallel... What should the optimum PV voltage be at the CC in direct sun? And what should the w be?
Also what should the V +A be coming out of a 60a CC going to the batteries 12v in boost mode? The best that can be expected?
I know what the manual alludes to but what's the best that can be expected?
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Post by Admin on Aug 30, 2018 22:18:59 GMT
Ok on 8 100w panels 4 and 4 in series and them in parallel... What should the optimum PV voltage be at the CC in direct sun? And what should the w be?
Also what should the V +A be coming out of a 60a CC going to the batteries 12v in boost mode? The best that can be expected? I know what the manual alludes to but what's the best that can be expected?
Remembering that these values are rough estimates and change based on factors such as temperature, air mass, insolation, and efficiency losses the following are estimates: Rated Watts: 800W @ 12V Anticipated Output: 640-680W Input Current: 10.5A-11A Battery Charging Current: Roughly 45A-55A Vmp at MPPT: roughly 72V Battery Charging Current 14.4-14.8 depending on battery Once again these are rough values, your location also influences these values. -Renogy Team |
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Post by tattoo on Aug 30, 2018 22:40:33 GMT
Thank you, all I was asking for is just close... So 75.6v on each side of the 4 panels in series in full sun is great, I checked them today... I couldn't remember if they should be more in parallel.... For some reason I'm not getting above 13.4 going to the batteries when I looked earlier.... I have 6 6v Deep cycle batteries to 12v and a 60a CC commander.... This is something new that just started two days ago.... It's been full sun so that's not the problem...
Any suggestions on where to look?
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Post by tattoo on Aug 30, 2018 22:58:48 GMT
Oh yea I checked the batteries 3 days ago with a hydrometer and they were all right at 1300.... So the batteries should be ok...
It all seemed to start when the CC went into equalize mode and it's been there for two days.... The max voltage of the day is 13.8 and it's never been that low in equalize...
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Post by Admin on Aug 30, 2018 22:59:13 GMT
Thank you, all I was asking for is just close... So 75.6v on each side of the 4 panels in series in full sun is great, I checked them today... I couldn't remember if they should be more in parallel.... For some reason I'm not getting above 13.4 going to the batteries.... I have 6 6v Deep cycle batteries to 12v and a 60a CC commander.... This is something new that just started two days ago.... It's been full sun so that's not the problem... Any suggestions on where to look?
Are you monitoring your system through the software or going out and checking the readings? What AH Rating are your 6v batteries? Also, what was your starting voltage reading on the batteries? -Renogy Team |
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Post by tattoo on Aug 30, 2018 23:05:50 GMT
Are you monitoring your system through the software or going out and checking the readings? What AH Rating are your 6v batteries? Also, what was your starting voltage reading on the batteries? -Renogy Team This morning the batteries were at 12.2 that was what the days low V by the CC said... I'm checking the reading off of the CC... I can walk up and look at my CC it's inside... If that's what your asking... My Solar system has been running for 8 months in this configuration with zero problems until the past couple days...
My batteries are a total of 645 ah... 215ah ea 6v battery...
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Post by Admin on Aug 30, 2018 23:22:56 GMT
Are you monitoring your system through the software or going out and checking the readings? What AH Rating are your 6v batteries? Also, what was your starting voltage reading on the batteries? -Renogy Team This morning the batteries were at 12.2 that was what the days low V by the CC said... I'm checking the reading off of the CC... I can walk up and look at my CC it's inside... If that's what your asking... My Solar system has been running for 8 months in this configuration with zero problems until the past couple days...
My batteries are a total of 645 ah... 215ah ea 6v battery...
Your batteries being 645Ah and at 12.2V is roughly 50-60% of the capacity. Depending on your location and prime charging sunlight, chances are that your batteries are not going to charge completely in a day. This is also contingent on whether you had a load connected to your batteries. If you do, then it might be drawing enough of a load to prevent boosting time so far. We recommend monitoring it another day, assuming your starting voltage battery is higher than 12.2 without a large enough load, and it should be boosting within another day or so. Hope this helps, -Renogy Team |
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Post by tattoo on Aug 30, 2018 23:27:24 GMT
Your batteries being 645Ah and at 12.2V is roughly 50-60% of the capacity. Depending on your location and prime charging sunlight, chances are that your batteries are not going to charge completely in a day. This is also contingent on whether you had a load connected to your batteries. If you do, then it might be drawing enough of a load to prevent boosting time so far. We recommend monitoring it another day, assuming your starting voltage battery is higher than 12.2 without a large enough load, and it should be boosting within another day or so. Hope this helps, -Renogy Team Like I said this is something new.... They use to FLOAT everyday until the last two days... My batteries are always at 12.7 by 10:00 am in the morning on a sunny day and 12.7 by 2:00pm on cloudy days so the batteries and the load isn't the problem...
Oh by the way the 12.2 that the CC is seeing is sag so that's not really the battery voltage...
What else could it be?? How can I check the CC to see if that's the problem?
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Post by Admin on Aug 31, 2018 0:12:34 GMT
Your batteries being 645Ah and at 12.2V is roughly 50-60% of the capacity. Depending on your location and prime charging sunlight, chances are that your batteries are not going to charge completely in a day. This is also contingent on whether you had a load connected to your batteries. If you do, then it might be drawing enough of a load to prevent boosting time so far. We recommend monitoring it another day, assuming your starting voltage battery is higher than 12.2 without a large enough load, and it should be boosting within another day or so. Hope this helps, -Renogy Team Like I said this is something new.... They use to FLOAT everyday until the last two days... My batteries are always at 12.7 by 10:00 am in the morning on a sunny day and 12.7 by 2:00pm on cloudy days so the batteries and the load isn't the problem... Oh by the way the 12.2 that the CC is seeing is sag so that's not really the battery voltage...
What else could it be?? How can I check the CC to see if that's the problem?
General recommendations include: checking the terminals for cleanliness on the charge controller terminals and battery terminals, making sure connections are tightly snug, using a multi-meter to determine more accurate readings, checking each battery (more than once cell) reading to make sure there are no differences in points for the hydrometer and when getting these readings making sure the batteries have not recently been watered (if flooded) and are under room temperature (possibly) conditions. The next recommendation is that you call our technical support line, it will be a better means for troubleshooting your system. Helpful information will be the 100W panels, 60A charge controller, battery chemistry type and Ah, and also expressed history of going into float until recently. All the best, -Renogy Team |
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Post by Guest on Aug 31, 2018 0:29:57 GMT
what kinda wattage or amps are the batteries getting around solar noon?
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Post by tattoo on Aug 31, 2018 0:36:04 GMT
what kinda wattage or amps are the batteries getting around solar noon? I'll let you know tomorrow.... I wrote it down but I'm not there at this time... Thanks |
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Post by tattoo on Aug 31, 2018 0:41:52 GMT
General recommendations include: checking the terminals for cleanliness on the charge controller terminals and battery terminals, making sure connections are tightly snug, using a multi-meter to determine more accurate readings, checking each battery (more than once cell) reading to make sure there are no differences in points for the hydrometer and when getting these readings making sure the batteries have not recently been watered (if flooded) and are under room temperature (possibly) conditions. The next recommendation is that you call our technical support line, it will be a better means for troubleshooting your system. Helpful information will be the 100W panels, 60A charge controller, battery chemistry type and Ah, and also expressed history of going into float until recently. All the best, -Renogy Team When I check the batteries with the hydrometer, I check every cell not just one per battery... But I will check them again and clean all the terminals tomorrow.
I'd rather post the info here as it's much easier to answer a question one at a time and think it through..... Rather than several questions all at once...
Plus the info will be here for others to learn from it in the future...
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Post by Guest on Aug 31, 2018 1:03:11 GMT
what kinda wattage or amps are the batteries getting around solar noon? I'll let you know tomorrow.... I wrote it down but I'm not there at this time... Thanks 75v seems too high in warm/hot temps but Vmp at standard conditions has not been supplied. Typical Vmp standard conditions ~17.5v. In very cold weather I could see 75/4 = 18.75 Vmp/panel. if the current or wattage is sub standard in bulk mode then measuring each string's open circuit voltage and current would be a good test. @5a/panel, each string should show 20A+ (good sun) with an open circuit voltage of 80v (typical 22v/panel decreased by heating). What is meant by sag in respect to battery or controller voltage? Does the display not match the battery? |
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Post by tattoo on Aug 31, 2018 1:17:26 GMT
75v seems too high in warm/hot temps but Vmp at standard conditions has not been supplied. Typical Vmp standard conditions ~17.5v. In very cold weather I could see 75/4 = 18.75 Vmp/panel. if the current or wattage is sub standard in bulk mode then measuring each string's open circuit voltage and current would be a good test. @5a/panel, each string should show 20A+ (good sun) with an open circuit voltage of 80v (typical 22v/panel decreased by heating). What is meant by sag in respect to battery or controller voltage? Does the display not match the battery? What I mean by sag is when my old fridge starts it draws down the batteries around .1 to .2 volts... Then bounces right back up to it's normal voltage at that time.....
Yea I don't know what the panels are at in the winter but they were 75.6 in direct sun today on each bank of 4.
Should I check each string of 4 by it's self tomorrow in full sun? and see what the CC says each side is doing? Just to see if each side is the same? Amps and volts?
Oh yea my panels are at the perfect angle with the sun this time of year, Not so much in the winter...
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Post by Guest on Aug 31, 2018 1:58:23 GMT
If you are not getting 40A or more into the batteries during bulk charge, direct sun, high noon then disconnect one sting and then the other and let the controller report voltage and power of each string, identical? Give the controller time to find the max power pt.
AFIK the lacking info is wattage or amps into the battery.
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