Parking lots are parking lots because they require low CapEx, almost no OpEx. You buy some abandoned land, raze it, asphalt it, charge $30 a day per space (at let's say 75 spaces), tow the rest (at the driver's expense). You're pulling in a little under $67k/month. Wait for a commercial developer to come buy and take it off your hands for 3x its value.
You know how much it costs to dig up the ground, install power lines, a box, then bury footings, bolt in legs, install panels, etc, 9+ feet high? For a whole parking lot? $300k-500k, minimum (that's how much it costs just to install a small fleet of EV chargers btw, that's not doing major construction over an area the size of half a football field).
How much you gonna make off these panels? A 200kW panel array generates about 480MWh/yr, which at 1MW/$40 comes out to about $19,200/year in SREC credits. PA energy price is $0.18/KWh, so 480MW is $24/hr. But you're making 80% efficiency and it's not sunny all day all year, so at even 50% usage, that's $24,960/year. Almost a third of what the parking lot makes a month. Before we talk paying back installation costs, assuming your net metering deal is perfect.
It would be cheaper to build a multi-story garage, where you'd make WAY more money.
You're dismissing the possibility of free EV charging attracting shoppers. Step 1 is getting people to visit your store, step 2 is getting them to buy something, and step 3 is getting them to come again. Step 1 & 3 would immediately get noticed by the corporate bean counters. The real problem I think is the up-front costs of the installation.
