I purchased this system (https://dakotalithium.com/product/dakota-lithium-12v-200ah-battery-plus-zamp-solar-panel-and-victron-bundle/) with an additional 170w solar panel. I will be running a cooper and Hunter mini split 12,000 btu at 120v. considering misc items plugged in for charging what size (kw) electric water heater can I get away with. Also the inverter can be switched to put out 240 @ 60Hz. With that being change will I still be able to operate the mini split. I can get additional 100Ah batteries if needed. Please help.