Net metering is indeed globally known to be bogus in a modern power system and is more and more being replaced. From outside I’d guess you’ll be able to get rid of it sometime soon even in a ~ failed state like the US despite potential lobbying constraints.
Many locations have asymmetric grid fees: when you draw, you pay for the energy and often even more for the grid per unit of energy, when you feed in, you get something but not so much. This may even lead to an overinvestment rather than underinvestment (at least if one doesn’t weight your resilience question very much) in batteries—that are in addition not even very grid-usefully utilized.
Further, trend clearly today—even if too slow and not radical enough—towards dynamic electricity pricing, even for simple households, a major step towards finally aligning your consumer & prosumer incentives with actual societal costs of marginal power consumption or feed-in: your incentive to install PV, use your power, and install battery and also to dispatch it IIF it’s socially a net plus.
Difficult to objectively assess what the value of widespread local battery availability is, and how to trade it off against other forms of reasonably decentralized storage—afaik currently larger scale battery packs are multiple times cheaper than single-home batteries, so bundling might still remain better; your resilient ‘island’ might ideally be the close or the commune or so instead of the house maybe. In many places e.g. in Europe, EVs are still rapidly increasing and these mean you have your local battery. If the ideal scale and technology isn’t so obvious, your subsidy risks to be yet another case of ‘picking winners’; the market for storage and new consumption patterns and maybe system-resilience/robusness solutions changes so fast that I’d prefer to mainly focus on setting incentives right more directly for what we actually want, which is an incentive structure that might yield some benefits to home battery installations, but I’d not be surprised if the ideal solution would mostly end up being something slightly larger scale at least in reasonably densely populated areas.
Spot on imho: “populism” is rather clearly not at all e.g. in OP’s words a believe “that a nuclear power plant design should be settled by popular vote”.
To your definition I’d add that it often comes with the aim to attract voter support for these dumb things all while ~ hideously pushing an agenda that is very clearly not in that electoral circle’s interest and maybe mostly unrelated to what they officially stand for (e.g. talk poor people’s problems, but benefit the rich firms—and maybe in the worst case, when a solution for the poor people’s problems could be in sight, even purposely not fully tackle it as it’s not in the party’s interest to make the people less angry).
Slightly ironically though, your “technocratic” though would be the better opposite to OP’s definition of populist in the nuclear example, rather than the usual one (yours/mine).
Imho the better opposite to the commonly used notion of “populism” is more things like “serious”/”honest” or so—though esp. the latter isn’t really a fit as most people who talk about populists and the rest know that in politics much is not in a broader sense honest anyway.