As great as it is, the ITC is only truly great for 2019. Starting in 2020, the ITC will drop from 30% to 26%. In 2021, it drops to 20%. And in 2022, it disappears completely for residential customers.
That means by waiting, you could see your savings reduced by anywhere from $700 to about $6,000. Not to mention the cost savings you’re missing out on simply by paying the utility company each month instead of owning your energy.