I live in South Australia. Pay aud$0.36c per kw, roughly us$0.28c. My state has had the highest consistent power cost per kw in the world for almost 20yrs.
If OP is correct in his price then they take the new lead? My price is the lowest I can get in my state checked every company. Are you sure yours is lowest?

Paid aud$4300(after $3500 rebate) for 6.6kw solar with 5kw inverter, should be paid off in just over 2yrs cos high sun here. Could of gotten cheaper but went with a good company.
Don't get cheaper rates because solar just get paid aud$ 12.4c per kw feed in. Then have to buy it back at night time for triple the price