hey guys I just got me 4new 6v Trojan 225ah I been charging my battery for 3days without using them.. My ? Is why does my Morningstar Tristar shows me a yellow n red light which mean 0-35% soc but when I check my battery volt it shows me 12.34volt 83% have use so far ..why does it show me the lights when my battery's is in 83% charge ? Is they sum thing wrong with my mppt or battery ?
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Are you getting that voltage reading while the charger is still on? How long after terminating charging did you take the reading?
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You cannot use voltage to determine SOC. You have already been told that. You need a hydrometer.There is a reason they are called IDIOT LIGHTS.Last edited by Sunking; 04-25-2017, 04:26 PM.MSEE, PEComment
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And also no loads at all for at least 4 hours?
Even when in a stable rested state, the voltage is not as good an indicator of battery SOC as the temperature corrected hydrometer reading.
The cost of a hydrometer (could be under $10US for some decent ones)------- is small compared to the value of saving the life of your battery bank. +SunnyBoy 3000 US, 18 BP Solar 175B panels.Comment
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