Have a autopilot swg with sc48 cell. salt tested at 3000 reads 28v 4.2 amps level 3 running at 110v. Just opend pool from long winter in New England water temp is 69. I remove cell and electronics and store inside for the winter. We only use pool 3-31/2 months every season. Getting warning/ check cell. I cleaned cell with muriatic acid and water per instructions. Outer plates have some wear and discoloration. Seems to have very low chlorine output. The amp hours are reading 31679 Ph 7.8 cya 30 ta 80 ch 130 a bit low.Pool size 18x36 vinyl liner. I,m Thinking the cell is tired. Is there any other things i can check electrically. I am a electronics tech by trade. Wondering if any problems with power supply. This seems to the first season with any probles I am Willing to spend $ for new cell just want to be sure its the problem. Can't remeber when i purchased and installed the generatior but has been flawless untill now. i want thank all in forum for all your insight. I use the bbb method the best thing i did. People comment on how my pool looks and how i keep so consistant