I have a Charles 5000sp charger with a Promariner Truepower 1000 inverter in the boat right now the inverter works for my needs but the charger is getting old and only charges lead acid batteries. I bought a used almost new Xantrex Freedom 25 charger/inverter that I haven't installed waiting till next month. I spoke with Promariner about their trade in program I can get a Truepower 1500QS charger/inverter new through their existing customer program and sell the Xantrex to pay for it and make a decent profit. I know the tech and specifications for both units either will work fine for my needs. What is your opinion or experience with customer service and reliability of either unit? Any advice would be appreciated.