Lets suposse you need 10kW to fulfill your needs. You can buy 10000/350=29 panels today at $200 each, or 25 400W panels tomorrow for $200 each. Saving $800 and

Lets suposse you need 10kW to fulfill your needs. You can buy 10000/350=29 panels today at $200 each, or 25 400W panels tomorrow for $200 each. Saving $800 and roof space for the same output.