Carbage
New Member
Hey all! I searched the forum, but didn't find anything that specifically answered my question (although I'm sure one of the 40,000+ posts on here would answer my question, I couldn't find it.)
I have a system comprised of a 48v 100ah 15 string LiFeP04 battery, a Renogy 3500w 48v inverter charger, and the primary use is to run an 1800w heater/AC unit. Connecting the battery to the inverter, is 3ft of 1/0 OFC wire with solid crimp connections (both positive and negative.)
The issue I am dealing with is that when I turn on the heater or AC, I drop from whatever current voltage is down 5-6 volts. I'm unsure if this is a common thing or not, or if there is a root cause. After the appliance is turned back off, voltage returns. I've checked all voltages on all points, and everything seems to add up. Is this amount of voltage drop normal?
The solution I've come up with (if you can call it that) is to turn my low voltage cutoff down from 44v, to 40v. I haven't actually done this yet, because my largest question is: will a voltage under load of 40v hurt the cells if it returns to a resting voltage over 44v? Sorry for the noob question and the rambling, I just wanted to try to cover all the bases. Thank you all for any help!
I have a system comprised of a 48v 100ah 15 string LiFeP04 battery, a Renogy 3500w 48v inverter charger, and the primary use is to run an 1800w heater/AC unit. Connecting the battery to the inverter, is 3ft of 1/0 OFC wire with solid crimp connections (both positive and negative.)
The issue I am dealing with is that when I turn on the heater or AC, I drop from whatever current voltage is down 5-6 volts. I'm unsure if this is a common thing or not, or if there is a root cause. After the appliance is turned back off, voltage returns. I've checked all voltages on all points, and everything seems to add up. Is this amount of voltage drop normal?
The solution I've come up with (if you can call it that) is to turn my low voltage cutoff down from 44v, to 40v. I haven't actually done this yet, because my largest question is: will a voltage under load of 40v hurt the cells if it returns to a resting voltage over 44v? Sorry for the noob question and the rambling, I just wanted to try to cover all the bases. Thank you all for any help!