Thanks, some search result I found say $2.95/W in my area which lines up with your estimate, what I don't understand is that why it's not per panel and I assume that there should be minimal labor difference installing panels of different wattage.
Because it is not contract labor. It is a bundle sold and installed by a company.
They may compute a price for a system, or they may just calculate a price based on wattage rating.
There is a complexity to pricing models, and that gets distilled down to equations in software.
Similar when I ordered kitchen cabinets from Home Depo. Any option, e.g. "furniture plywood ends", is simply priced as a percentage multiplier on the entire order.
These projects are far to small to price out each component and each labor step.
You can't get anyone to just install an array for you.
An array would not be code compliant, and permits would not be available. You need a "rapid shut down" system, which is the integration of module-level power electronics, an inverter with keep-alive transmitter, a switch or RSD button to activate it.
About the only choices you have are to order off the menu offered by a solar company,
or design a system, create drawings, apply for permits, and install it either yourself or with people who are technically our employees.
Not likely you can get any contractor or electrician to do any of the work.
You could buy a complete installed grid-tie system with string inverter, then disconnect their invertor and connect yours. But you would need to know the PV array design, that it was compatible with your hardware. And you would need to get the RSD keep-alive working.
Well, if the manufacturer or rep at Costco can refer you to an installer, then you're in luck.
us.ecoflow.com
"For CA/TX Homeowners only, check the new exclusive bundle included installation fee below to enjoy an end-to-end order to installation service"
Don't know if that includes the PV you're looking for, however.
I think this is just a battery backup (UPS) system.
"The most powerful whole-home backup solution
-7.2kW-21.6kW output with up to 3 inverters
-Up to 90kWh capacity with 3 inverters and 15 batteries
-5.6kW-16.8kW solar input with up to 3 inverters
-Online UPS, 0-ms transfer time
-LFP battery"
You're probably better off determining what functions and capacity you want, then selecting a system which offers that and has installation companies in the area.