I have been running a Trace/Xantrex SW4024 for over 15 years, had it rebuilt once about 7 years ago, AC coil burned out. Same thing just happened after a power outage. It just happened so I am evaluating my options whether to get it fixed, which is a hassle shipping a 100# item, or to replace it with new technology. What is a reliable 4KW 24V inverter nowadays? I have a 400AH battery bank, 4 X 6 volt Lifelines and a solar array. I had the inverter repaired by a company in Washington state and they were knowledgeable and did a good job but parts for these old units are getting hard to find so it may be time to update. Any input would be appreciated.