wow... thats too early. My Phoenix Xp165 lasted 3 years with desi ups... trick is to keep an eye on the charging, load and electrolyte level and it can last long.
Mine died when I broke my digital meter and wasn't able to check it for long time and also my ups kit was pathetic as it did not had any low voltage disconnect so it really sucked the battery till 8 volts
even then 3 years is not bad 