A lot of electricity in the US is charged differently during "off-peak hours". I know some EV owners who take advantage of this by scheduling when they charge their cars.
Probably not, as it has nothing to do with where the electricity is coming from or how it's being used. Having different rates for different times of the day which still apply to all users and all services is not generally perceived as a violation of neutrality.
The point of net neutrality is that ISPs should ignore the content, source, and destination of the packets they carry when it comes to prioritization and pricing. QoS is fine as long as it's under the subscriber's control (for example, via DSCP tags), but it can be an issue if it leads to the ISP one subscriber's traffic over another's based on the services being accessed. Tiered services (paying for higher bandwidth, lower latency, etc.) are also fine so long as the tiers assigned to each class of traffic are chosen by the subscriber and not tied to specific protocols or peers.
Consider the USPS as a model of neutrality: they offer various grades of service from bulk package deliveries to Priority Mail but everyone paying for the same service gets (more or less) equal treatment.
I'm honestly surprised at the backlash against net neutrality on here.