I have a 48 volt system with 2- 12 year old xantrex 4048 inverters for 110/220 volt power. I have 2 strings of rolls batteries for 1278AH. I also have 24- 175 watt shell solar panels. The estimated battery life is 10-15 years on the Rolls batteries and I am in year 12 or 13. I would like to convert to a lithium battery system but wonder what a good and economical system would work with my current inverters. Are there any battery systems that would still charge with these inverters and give me a descent capacity for a price that will not break the bank? If I get 400ah of the Battle Born batteries it will cost me $16,000. I probably use 250-350 AH per day on my current system. Is there a better way to go that is long lasting and safe?