Long time lurker, but a new user here. I am posting to get some suggestions and recommendation from experienced users at this Engineering corner (@farhan_ds). I upgraded my solar system from axpert to infini 10kw around 8 months ago. Along with the infini I opted for Narada MPG200 Gel batteries (2 strings of 4xseries). I have been facing issue with my batteries as they do not hold charge. I diagnosed 3 batteries which would drop below 10V under nominal load of 2000W.
I am in a process to request a favor from the vendor if he can claim the warranty. Warranty was 6 months. I am posting here cuz I am shocked on the performance and life of the batteries. I am sure there is something wrong with any cell of the battery. Fully charged bank of 4x 12v 200A Narada batteries gave me a backup of ONLY 35mins on 2000W load. Battery bank volatge dropped to 45.6V and low battery warning started.
My sacred sun sp12-245A batteries lasted longer than this.
I am thinking to have this battery bank troubleshoot and shift to tubular batteries. Any recommendations? I wish we could get Luminous batteries (India) here with their 5year warranty.
Setup: Infini 10KW, 6480W of Solar panels installed.