Lumin is usually the smarter buy when your existing panel is fine and you only need smart control on key circuits. SPAN makes more sense when you already need a panel replacement or want one app controlling most of the house.
GenerLink usually costs about $1,000 for the device, but the real question is whether your utility approves it. Here's when it beats a transfer switch and when it doesn't.
SPAN is worth the money when it helps you avoid a service upgrade or buy a smaller battery system. If you just need a normal panel swap, the premium is hard to justify.
Manual transfer switches are cheaper and usually better for portable generators. Automatic transfer switches cost more, but they're the right call when backup power needs to take over while you're away.
An interlock kit costs $200 installed. A manual transfer switch costs $1,000. Here's when each makes sense and what your local code might require.
What a transfer switch does, why it's legally required, and how to choose between an interlock kit, manual subpanel, and automatic transfer switch before you call an electrician.