Hi @i007791
Have you read our Guide to Buying Solar eBook?
I would highly recommend reading chapters 2, 5 and 6 before going any further with your purchase.
https://forum.cleanenergyreviews.info/t/ch-2-who-should-i-buy-solar-from/155
https://forum.cleanenergyreviews.info/t/ch-5-how-much-will-a-solar-power-system-cost/158
https://forum.cleanenergyreviews.info/t/ch-6-what-panel-and-inverter-brands-should-i-buy/159
Let me know if you have any specific questions.
Cheers
Marty