CHP is a very cost-effectively for on-site generation, and it makes sense to continue to deploy systems that can eventually run on hydrogen.
Cost-effective long-term storage is a big deal, so I'm following that.
As for how you can buy renewable energy, if you're in a deregulated state
https://www.electricchoice.com/map-deregulated-energy-markets/ (though it's not completely accurate*) for electricity, there are many different energy suppliers, many of which offer renewable energy.... Alternatively, if you're in California, many municipalities now have Community Choice Aggregations (these also exist in IL, OH, NJ, NY, MA, and RI but are not as successful there because those states are deregulated), which can offer electricity at cheaper rates and with a greater percentage of renewables. More info on those here:
https://leanenergyus.org/ and this site is California-specific
https://cal-cca.org/.
Other states are considering legislation to permit CCAs, as well, including regulated states like Arizona, Colorado, and Michigan*. I think I mentioned earlier that Ann Arbor is trying to create their own CCA if the state allows it.
*Michigan is a weird situation where it is partly deregulated but the number of customers that can buy their energy from an energy supplier has been maxed out.
Unfortunately, the Southeast and other Western states are still highly regulated and the utilities there control the whole system.
I've mentioned before that I think Texas has the best model with full deregulation such that the utilities have no customers and don't directly own any generation. There's a market on the generation side, which has accelerated their transition to wind and solar, and energy suppliers have to compete on low prices so electricity is more affordable. I don't see other states going that direction any time soon, though, so the CCA model is the best alternative that I've seen.