Power supply & Power inverter for boondocking

If you already have the 3kw inverter keep it. It will won't draw much more than a smaller inverter powering the same load. It will work great for the microwave, toaster, coffee maker, etc. Short duration large loads.
What inverter is this? Does it also have a charger built in?
What is the 12v 60 watt power supply for? Did you mean 60 amps? A 60 amp supply would be great for charging a big battery bank.