19

The "surge" that the electric utility was referring to is the demand charge: The kWh charge (consumption) is the measurement of the amount of energy the building uses over the given period of time. The kW charge (demand) represents the amount of energy consumed at a single point in time. An intuitive way to visualize this is through the car ...


7

Power ratings -- choose level VI Take a look at any external power supply (EPS) you have lying around -- you should notice, along with all the regulatory markings, a roman numeral I through VI in a circle. Here are four that I just dug up in my house: These indicate energy efficiency standards for EPS starting with the California Energy Commission in 2004 (...


6

tl;dr: Because of how the grid and your inverters work, it's unlikely that there is a solution for your current system. You will either need to set up a communication network with your microinverters and another device, or you will need to set up an ac-coupled system with a centralized battery charger, inverter, and grid disconnect. This will probably ...


6

The primary issue being described is Peak Demand charge. The description in LShaver's answer explains a lot of that, but there are a few more pieces that I think are important: Why does peak demand matter so much that utilities charge extra for it? The transmission/distribution system needs to be able to handle peak demand at each level (transmission lines,...


4

The company was having problems with demand pricing as discussed in other answers. That's not a problem for residences (usually). At a "micro" level on the grid, it doesn't matter. You dancing through your house throwing all your loads on at 8:16 isn't going to make a difference to the generator, because your tiny peak will "disappear in the ...


4

By order of magnitude your approximation is reasonable. I compared it to a 2021 analysis performed by Mark Jacobson as part of his 100% Wind, Water, and Solar (WWS) All-Sector Energy Roadmaps for Countries, States, Cities, and Towns. The results for Italy are available here (pdf). For a complete electrification of the transport sector by 2050, Table 2 shows ...


2

Check the TRM for recent, state-specific data Illinois (and probably other states) now requires energy efficiency programs to estimate the energy impact of water supply and discharge -- in Illinois, the value is 0.68 watt-hours per liter (footnote 122 of the Illinois Technical Reference manual). The TRM of the state you're interested in would probably ...


2

10 CFR 430.32 - Energy and water conservation standards and their effective dates is the U.S. government standard defining (among other things) how energy consumption of refrigerators is to be tested. The standard references the test procedure AHAM HRF-1-2008, developed by the Association of Home Appliance Manufacturers, an association which "is an ANSI ...


2

According to the manual, the Kill-A-Watt is calibrated to accuracy within 2%, with 0.5% being typical. In contrast, any conventional electrical load which you might have in your house won't be calibrated at all. It will have some maximum current limit, but beyond that, even for the same product, the actual load might vary by as much as 10% -- there's simply ...


2

A properly made normal thermometer will function perfectly well in a refrigerator, as you describe. As with all mercury based thermometers be careful not to break it. Cleaning up and then dealing with the released mercury would be problematic. If that were to happen contact the waste disposal department of your local municipal council and get advise because ...


2

In terms of efficiently using sun's energy. Let's not forget passive solar. With no mechanical parts to break, a sufficiently heavy or phase change thermal mass can go a long way when the house is properly insulated. 4 m2 of windows (40 sq ft) is close toe 4 kW. (circa 12 000 BTU )


2

There's an interesting summary of the situation in the UK here. In short, the most widespread option is likely to be heat pumps, despite some significant disadvantages, such as cost, and that fact that they don't always work well with existing heating infrastructure. It may be that hydrogen, generated by renewable power, will also play a significant role - ...


2

There are two different ways you could do this depending on how much programming you want to do. Start with a commercial smart power strip with energy monitoring There are likely a number of compatible products, but I've used TP-Link's Kasa line in my house. They offer the HS300, a smart WiFi power strip with energy monitoring. From the specs: 6 Smart ...


2

In my country, a typical motorist drives 15000 km/year. With state of the art electric cars that consume less than 0.2 kWh / km, and taking into account charging losses (that bring the total consumption from the grid to about 0.2 kWh/km), that's about 3000 kWh/year for a single passenger car. The world produces 25600 TWh/year of electricity and has about 1 ...


1

Theoretically, if the charge is big enough for the electrical wiring the heat can also be a concern. When everything turns on together a high current can make the cables hot and that increases its resistance, making it consume more energy. But this increase is usually insignificant, especially if the wiring is dimensioned properly.


1

There are two general approaches to reducing heating costs: Reduce the amount of space/floor area/volume that needs heating. Improve the insulating value of the enclosure (eg. plastic on windows) Suspended Panels It sounds like your primary concern here is the 12" high ceilings, and you are wondering if you can effectively reduce the volume of the ...


1

By installing a white noise generating app do you intend to keep the phone connected to the mobile/cellar telephone network & thus continually use phone bandwidth 24/7? I would have thought a digital recording of white noise played on a continuous loop would be more sustainable. It is possible to purchase white noise generating machines. I see some are ...


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