Solar Installation Power Bill Will Be ?

My Power Bill in November With Solar  System :

My power bill came in November.
6.21kW solar
5kW inverter
Family house – ac, dryer, hot water on a timer
Presolar this place was $700 a quarter up to $900
Using your power efficiently you can achieve sub $300 bills.

When people tell me adding solar doesn’t work, I scratch my head. I’m yet to see 1 client not benefit from a correctly designed system and education.
My last bill was $243
Yearly I pay about $900

My system is around $5000 installed and only takes 3 years to cover it’s costs and some.