Re:I regret building this $3000 Pi AI cluster
by mrkstu on Friday September 19, 2025 @09:58PM
(#45309384)
If he’s only paying $50 most of it is connection fees and low usage distorting his per kWh price way up.
Re:I regret building this $3000 Pi AI cluster
by mercutio2 on Saturday September 20, 2025 @06:06AM
(#45311965)
There are 3 different components of PG&E electricity bills, which makes the bill difficult to read. I am also in PG&E East Bay community generation, and when I look at all components, it’s:
Minimum Delivery Charge (what’s paid monthly, which is largely irrelevant, before annual true-up of NEM charges): $11.69/month
Actual charges, billed annually, per kWh:
Peak NEM charge: $.62277
Off-Peak NEM charges: $.31026
Plus 3-20% extra (depending on the month) in “non-bypassable charges” (I haven’t figured out where these numbers come from), then a 7.5% local utility tax.Those rates do get a little lower in the winter (.30 to .48), and of course the very high rates benefit me when I generate more energy than I consume (which only happens when I’m on vacation). But the marginal all-in costs are just very high.
That’s NEM2 + TOU-EV2A, specifically.
Re:I regret building this $3000 Pi AI cluster
by nullc on Saturday September 20, 2025 @01:46PM
(#45315507)
Are you actually able to compute that? With PG&E + MCE because of the way they back off the PG&E generation charges, the actual per-time period rates are not disclosed.
I can solve for them with three equations for three unknowns... but since they change the rates quarterly by the time I know what my exact rates were they have changed.
That said, I am not sure those numbers are true. I am in California (PG&E with East Bay community generation), and my TOU rates are much lower than those.