Has any one on here any experience with a product called 'Interlock'? They're a plate that slides over existing panel cover to lock out either the main or the 1st 2 bkr. spaces. They're over priced @ $150, but a deal for the cust.I've been delaying a job to check this out.
I've installed probably 20 of them. They work great but are way overpriced as you noticed (its only a piece of sheetmetal). In my opinion they offer much more flexibility as any breaker in the panel can be turned on but the home owner has to be smart enough to not overload the generator. We install a watt meter as part of the package. We also use a Reliance outdoor power inlet box and normally feed the panel from the power inlet box with 6/3.