PYLONTECH LITHIUM BATTERIES ARE USELESS AND EXPENSIVE

I have been told that Pylontech lithium battery is the best in the Market. THAT IS A LIE, PYLONTECH BATTERY IS TERRIBLE. THE BATTERY DOESN'T EVEN LAST FOR MERE 12 Months WITHOUT GIVING YOU SERIOUS TROUBLES. NO ONE WILL HELP AT ALL. I HAVE A 3000C WICH ALWAYS SWITCHES OF AS THE SUN GOES DOWN, I RUN MY SYSTEM OFF GRID. WHICH MEANS EVERY EVENING THERE'S NO POWER IN THE HOUSE, THIS STARTED WHEN THE BATTERY WAS MERELY 9 MONTHS IN MY HOUSE AND I HAD BEEN TOLD TO RESTART IT MORE OFTEN, BUT NOW THE BATTERY IS USELESS IN JUST 24 MONTHS YET WE ARE PROMISED A LIFESPAN OF 15 YEARS. STAY AWAY FROM PYLONTECH LITHIUM BATTERIES...