You have several ways you can go about getting your inverter installed. We use a 1500 Samlex inverter paired with a transfer switch. I have a relay (see link) installed that when the inverter is on it turns off the converter. With the relay I don't have to worry about forgetting to switch a breaker.
Depending on what you want to run off the inverter depends on the size. I can run my microwave without issue but that does put a hurt on the batteries. We change our electronics overnight, have a baby monitor on to watch the toddler down below, and run a fan all night. We use about 10% of our DC power over night. With our solar setup we are fully charged between 11am-2pm depending on solar coverage.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1