I've searched all the threads I could find for a post on step-by-step guidance upgrading my 6V batteries with a pair of Battle Born Lithium batteries and changing out the original MM612 inverter plus my WFCO Power Converter (WF-8955 to a Progressive Dynamics PD4655V) to maybe a Xantrex 2000 inverter/charger. I currently have 500 watts of solar (5 100-watt Renogy monocrystalline panels), a Bogart Engineering SC-2030 Solar Charger, and a Tri-Metric TM-2030 Battery Monitor. This system has worked very well for several years. I seldom use my diesel generator except occasionally for the microwave and AC. I would like to operate the microwave a few minutes here and there with the inverter plus have the added capacity for other items or outlets I could move to the inverter bar. I have an early model, 2015 Murphy Bed. I think switching out the batteries is straight forward enough but have questions like; which inverter/charger is best, where to mount it, size of wiring (AWG 4 if close to the batteries?), programing it to charge the new batteries, how to move the microwave, and receptacles, etc. to the inverter bus, size and type of DC breaker needed, and hopefully pictures. I tend to be pretty visual. Any advice or help would be appreciated. Thanks in advance.