A few years ago I installed 2 140W Kyrocera Solar panel (in parallel) and a Morningstar Duo 25A 12VDC charge controller. My house bank is made up of 3 x 105A/H @ 20A AGMs, probably 3.5 Y/O by now. What I've been observing is during peak sun are over voltages going up to 16VDC.
Besides the Morningstar Remote Monitor I also have a Victron BVM 602s and both are showing high voltages. My 750W inverter is also kicking off on high-voltage shutdown.
Checking Solar input to the Duo shows about 20VDC (with + & - lead connected to the Duo) at the time I'm seeing the high voltages on the batteries.
I've only recently observed the Duo LED status go from Green to Red on high voltage disconnect. This is a new Duo replacement as I had them send me another as the original Duo was suspect as I was incurring high voltages with it thinking its the controller.
So basically I am at a loss on this issue and MorningStar says for me to check the batteries.
As far as I can tell the batteries are doing OK, holding good charge, have minimal loading off hours (DC Refridgeration, LED Lighting, Boat Fan) and go back to 100% SOC shortly after sunrise and and SOC of 85% before sunrise. I suppose I could start disconnecting each battery at a time to see if I can find some issue but not sure what to look for...
I'm in the Caribbean with high ambient temps too....so are the batteries creating an excess voltages or is the controller the issue?
Any advice or opinion on why I'm getting high voltages would be greatly appreciated....
Besides the Morningstar Remote Monitor I also have a Victron BVM 602s and both are showing high voltages. My 750W inverter is also kicking off on high-voltage shutdown.
Checking Solar input to the Duo shows about 20VDC (with + & - lead connected to the Duo) at the time I'm seeing the high voltages on the batteries.
I've only recently observed the Duo LED status go from Green to Red on high voltage disconnect. This is a new Duo replacement as I had them send me another as the original Duo was suspect as I was incurring high voltages with it thinking its the controller.
So basically I am at a loss on this issue and MorningStar says for me to check the batteries.
As far as I can tell the batteries are doing OK, holding good charge, have minimal loading off hours (DC Refridgeration, LED Lighting, Boat Fan) and go back to 100% SOC shortly after sunrise and and SOC of 85% before sunrise. I suppose I could start disconnecting each battery at a time to see if I can find some issue but not sure what to look for...
I'm in the Caribbean with high ambient temps too....so are the batteries creating an excess voltages or is the controller the issue?
Any advice or opinion on why I'm getting high voltages would be greatly appreciated....
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