Just some number out there, if you buy all your own parts so this isn't including labor, here's what I'm finding:

 

A system that can handle roughly 1400 kwh (monthly) which is about 46 kwh (daily).

 

46 kwh * 1000 = 46,000 watts (daily consumption)

 

one 250 watt panel in Florida on a normal sunny day will provide 850 watts of daily power. (250 * 4 * .85 = 850)

 

take that 46,000/850 = 54.11 call it 55 solar panels needed. The BEST price I've found on the panels is about $190 a piece or in bulk pallets of 25 for $5250. Say you buy them individually (I think after shipping the bulk option would be cheaper) $190 * 55 = $10,450 (solar panels alone) you'll need multiple inverters, I'm finding a 4,000 watt inverter runs about $2,200. At one time you'll be converting 55 panels at (250 watts * .85 =  212.50 watts) each so that's 11,687 watts in an hour/4000 watts per inverter = roughly 3 inverters. 3 inverters * $2,200 = $6,600 I haven't really looked into the battery backups yet but I know they're pricey. Without a battery backup when the power goes out so does your solar, that's the bad part.

 

So without figuring labor, mounting brackets, cables, in raw materials for a system that doesn't do anything for you when power goes out your looking at about $17,050.00

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