newbie looking for reassurance!
Hello, group! Ive been reading and learning from these forums for quite some time and I'm excited to make my first post!
I've been off grid for 3 1/2 years and I've successfully killed my first battery bank, hopefully through no fault of my own.
Heres my specs first.
location: Southern middle Tennessee
pv array: (6) 100 watt renogy monocrystalline panels, Wired in series
charge controller: Renogy mppt tracer (20 amp)
existing battery bank: (6) duracell ultra agm 12 volt 155 ah batteries wired in 3 parallel strings to get 465 ah @ 24v (these batteries are considerd U.P.S. batteries)
inverter: go-power pure sine wave 24v inverter (1500 watts)
My consumption average is 1 kilowatt hour per day.
I noticed my battery voltage had been looking a little on the low side several months ago. Checking individual batteries with a volt meter I originally found 2 dead batteries in the string. So I simply removed those two batteries from the bank and reduced my energy consumption substancially as well. Fast forward 2 months and I found myself in the same predicament with 2 more dead batteries in the bank. Again, I removed them from the bank and left one 155 ah 2 battery connection in place, and turned the inverter off. One week later after I checked on the set up and with minimal load at night (13 watt led light on) the voltage dropped low enough to trigger the lvd on the inverter and it shut down. So now all 6 of my batteries are junk.
My charge controller display averages 50-60 volts at 10 amps input from my array during the day so I feel comfortable that my system is working properly. And I also understand that I have effectively achieved over 1200 cycles from my battery bank.
My questions are: Does my setup look correct as in does anything stand out as a battery killer?
Am I correct that agm batteries do not have the cycle life as traditional flooded batteries?
Is 3.5 years too short of a lifespan on this battery bank?
I'm considering purchasing 8 trojan t105 batteries as my replacement bank which will be wired in two strings of 4 giving me 450 ah @ 24v.
I will build a housing for them that will vent outdoors as they will be kept indoors.
All variables aside, what would the average cycle count of these t105s be compared to the previous batteries?
Is there anything I should be doing differently to help keep my bank alive?
I'm excited to read the responses from the pros!!!!!!
Thank you so much in advance!