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  1. nwdiver

    2xPowerwall whole house backup - HVAC sure start problem

    Depending on how old your AC is it may be worth investing in the new unit. A truly variable speed compressor (not just staged) completely eliminates any starting issues.
  2. nwdiver

    Supercharger - Socorro, NM

    Even L2 would be fantastic. That's a terrible gap.
  3. nwdiver

    Supercharger - Socorro, NM

    This was posted on FB. Looks like a soggy mess.
  4. nwdiver

    EV Charging Signage @ Interstate Exits

    Do we really need that in 2022 when anyone with a car is going to have a smart phone?
  5. nwdiver

    Power out in East Bay, Pleasanton

    I dunno... I found putting solar on my roof to be A LOT easier than being poor...
  6. nwdiver

    Who can catch Tesla ? They seem to be experiencing exponential growth…..

    This GM dealership is apparently selling a lot of EVs :)
  7. nwdiver

    (perhaps) half of solar and wind energy production should go towards hydrogen production

    Why do you think we would need a mandate??? When it makes sense it's gonna happen.
  8. nwdiver

    Tankless water heaters are terrible....

    For anyone is WA state PSE and Seattle City Light are offering a $500 rebate on HPWHs. And it's an instant rebate so it's immediately taken off the sale price.
  9. nwdiver

    (perhaps) half of solar and wind energy production should go towards hydrogen production

    I... I....I.... .... I honestly don't understand how you don't understand this.... if demand is ~30GW and renewable supply is >30GW and you've pulled in every watt of demand you can with demand response you send the surplus to split water instead of wasting it. No mandate required. Why would...
  10. nwdiver

    Nuclear power

    So we also need higher taxes, higher electric rates and more inflation from funding nuclear boondoggles? Why? I don't necessarily mind those things... but I kinda want to get more than a yard full of scrap metal in exchange... SCE&G customers will ultimately pay $3.8B for VC Summer under...
  11. nwdiver

    Lost at charging station, Soledad, CA

    Try a post on plugshare too.
  12. nwdiver

    Climate Change Denial

    You don't have to be a climate scientist to understand basic energy conservation laws and radiative forcing. That's what's so insane about this rejection of INCREDIBLY basic physics. John Tyndall and Svante Arrhenius weren't climate scientists... in their day no such thing existed but their...
  13. nwdiver

    Climate Change Denial

    ??? We know that CO2 increasing from 180ppm to 280ppm drives a ~10C swing in global average temperatures. That's born out in the climate record AND backed up by physics. Not only is CO2 more than capable of that degree of warming but it HAS happened dozens of times. You don't think CO2...
  14. nwdiver

    Prediction: Coal has fallen. Nuclear is next then Oil.

    Not sure why you're using amps. TWh, GWh, MWh or kWh is the unit you really need to pursue. Commercial solar isn't $5/w. It's closer to ~$1/w. Even residential is closer to $2 than $5 today. >90% of solar installs still have no batteries. Nuclear isn't $5,366 per kW. Like I said. Vogtle...
  15. nwdiver

    Prediction: Coal has fallen. Nuclear is next then Oil.

    .... wasn't referring to rooftop solar...
  16. nwdiver

    Prediction: Coal has fallen. Nuclear is next then Oil.

    It’s not really that simple. There are externalities that can be a challenge to properly value. NIMBY is an increasing issue. Even solar advocates may not want to live surrounded by an ocean of blue panels. How do you value the potential of a micro grid capable of operating independently...
  17. nwdiver

    Prediction: Coal has fallen. Nuclear is next then Oil.

    How much is too much for nuclear? Vogtle is now at $34B for ~2GW. To get the same amount of energy from solar or wind is <$5B. Nuclear is insanely expensive and that’s gotten worse not better. And it’s quantifiable… math isn’t about ‘thinking’… you don't 'think' 2+2 is 4... 2+2 IS 4...
  18. nwdiver

    Wiki Animal agriculture is responsible for 18 percent of greenhouse gas emissions

    Nope. I just checked. It's still 100%. The 18% allocated to agriculture is just combined between CH4 and CO2 for total share of GHG. You're probably confusing the with the share of a sector. For example beef is ~25% of agriculture GHGs. Which is insane.
  19. nwdiver

    Go Fund Me for EV Charging in SE NM

    Xcel can't really do that. It's 240v service so it has to conform to 240v standards. But they did upsize the wire and the transformer a bit so you get a solid 240v even under full load.
  20. nwdiver

    Breakthrough in Nuclear Fusion

    The irony is that they're 'straw man' arguments against fission... in support of fission. The nuclear industry would much rather discuss problems they've solved (waste and safety) than the problems that cannot be solved (Cost, Cost, Cost and Cost). A replacement for fission needs to do one...
  21. nwdiver

    Breakthrough in Nuclear Fusion

    Not really.... because physics. You can't technology your way out of physics. There's a thermodynamic limit to the Y useful energy you can get from X heat. This is generally ~34%. So for every unit of electrical energy you get you have to get rid of 2. It's physically impossible to compete...
  22. nwdiver

    Breakthrough in Nuclear Fusion

    They actually have almost all the drawbacks of fission reactors. They're high cost, thermal and there will still be radio active waste. The only 'problem' fusion solves is that of long-term waste storage which is more than manageable. One of worst radio nuclides produced in nuclear reactors...
  23. nwdiver

    Breakthrough in Nuclear Fusion

    To highlight the difficulty in productively harnessing fusion outside a star as I mentioned upthread. This fascination with nuclear really confounds me. Is not the objective cheap, abundant and reliable energy? Nothing is cheaper or more abundant than wind and solar. If we could use that to...
  24. nwdiver

    Breakthrough in Nuclear Fusion

    I think the applications where CHP is economically viable are a lot more niche than most people would suspect. The new Ford Class carrier is a good example of this. On the Nimitz class almost everything was steam powered... even the air conditioning was steam powered using adiabatic cooling...
  25. nwdiver

    Breakthrough in Nuclear Fusion

    May your wish be granted :) Solar Panels | Tesla Fun fact about the sun. It radiates ~0.0002w per kg. A human radiates ~6w per kg. So getting a 'sun in a bottle' would actually be incredibly useless. A giant ball ~90M miles away is FAR more useful. As @miimura pointed out anything that...
  26. nwdiver

    Nuclear power

    I’m fine with investing in nuclear life extension as long as it’s structured in a way that it doesn’t slow the deployment of solar, wind and storage. We probably are hitting deployment material constraints where accelerating production is forcing an exponential increase in cost. Maybe...
  27. nwdiver

    Nuclear power

    Hopefully. But that's a little like finally landing a great job at 40 when you're married with 7 kids, a mortgage, student loans, Timmys medical bills, etc, etc. There's a lot of places that H2 needs to go before a fancy car will make any sense. Globally we need 30B kg just for Fertilizer.
  28. nwdiver

    Nuclear power

    I guess if they have enough :) Hopefully they're slowly learning there are usually better uses for H2.
  29. nwdiver

    Nuclear power

    Also, Japan is an island surrounded by water. Big water. Ocean water. They could use all that wind energy to make H2. Basically limitless energy storage. Almost certainly a fraction the cost of fission.
  30. nwdiver

    Optimizers... what are they good for?

    That was essentially what I wanted to dispel with my post about de-limiting that string. The loss of efficiency panel to panel isn't that significant. As I discovered today you can be ~6% off the MPP but only lose ~0.4% of production. I was a bit surprised. I expected a gain of ~200w but...
  31. nwdiver

    Optimizers... what are they good for?

    Yes. That certainly is the way it works but that only applies to a FULLY shaded module. The optimizer is on the panel level. If you have a 300w panel with 2 cells in a cell group shaded you're gonna get the most power out of that panel by bypassing that cell group to get 200w instead of...
  32. nwdiver

    Optimizers... what are they good for?

    It would be interesting to see how that calculation is being determined. I hadn't logged into my Tigo account in a while. I guess this is a new feature? This is what mine shows. But there's no shade at all so how does it filter reclaimed energy? And.... this is odd. I think this shows...
  33. nwdiver

    Optimizers... what are they good for?

    I thought this was another good example of why optimizing at the panel level is expensive nonsense. We just completed an install of some newer 365w panels. Unlike previous panels I've worked with these actually have a MPP current of ~10.7A. On hot days that creeps a little higher...
  34. nwdiver

    Ercot issues Conservation Warning

    ERCOT has DC interconnect capacity like an American has Emergency savings 🤣
  35. nwdiver

    Beginning of the end - at least in my mind

    Yeah. I'm afraid of how much the increased flow of funds from other EVs will slow down the deployment of more superchargers sites.
  36. nwdiver

    Politics - Quarantine Thread

    You appear to have some fairly selective reading. From what I've seen there's broad consensus here that the exports of rooftop solar often IS 'worthless'. There may even be broad consensus that it's often worse than useless. The biggest disagreement for me is the idea that the utility should...
  37. nwdiver

    Supercharger - Lubbock, TX

    They said ~1 week.
  38. nwdiver

    Infrared Photovoltaic Panels - A New Energy Source?

    Yes. The surface area not the volume and they're not directly proportional. Doubling the volume doesn't double the surface area.
  39. nwdiver

    Infrared Photovoltaic Panels - A New Energy Source?

    .... that's where conservation of energy says yeah, nah. You can't stack 100,000 and get 70kW of power. Don't work like that.
  40. nwdiver

    Infrared Photovoltaic Panels - A New Energy Source?

    .... sure.... ~0.7w per m^2.... just like your graph says. But you'd get ~10x more energy from a Hamster running in a wheel and it would be ~100x more adorable.
  41. nwdiver

    Russia/Ukraine conflict

    Start here.
  42. nwdiver

    CPUC Nem 3.0 discussion as it relates to Energy Products

    This fetish the CPUC has with charging for behind the meter consumption is idiotic. That's just going to encourage non-connected off-grid systems that can't import or export then everyone loses. They need to just find the right arbitrage and be happy buying for $0.05 and selling for $0.50...
  43. nwdiver

    Climate Change Denial

    Can you be less specific?
  44. nwdiver

    Climate Change Denial

    And most of that time the change was caused byyyyyy? A change in atmospheric CO2 levels. What's causing CO2 levels to rise at a historically unprecedented rate today? And when I say unprecedented I mean >100x faster than the Earth has ever seen before. What do you suppose is causing CO2...
  45. nwdiver

    Tesla Model 3 vs ICE as it relates to the environment

    .... by that 'logic' murder should be legal because everyone dies eventually.
  46. nwdiver

    CPUC Nem 3.0 discussion as it relates to Energy Products

    ..... wouldn't a higher TOU rate accomplish the same thing? Shouldn't a non-solar customer using 10kWh during peak hours pay more than a solar customer using 8kWh? And it comes out as a wash across the rate class. Should someone have to pay $40 for the day if they needed a quick 30 minute...
  47. nwdiver

    CPUC Nem 3.0 discussion as it relates to Energy Products

    How are you arriving at $3.20 with solar? If you're using the grid less during those critical hours you SHOULD pay less regardless of whether you have solar or not. Someone with batteries and no solar that shifted their use from 4-9 to noon-4 should also pay less. Let's say solar customers...

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