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  1. fromport

    Scientists have achieved record-high energy and power densities in micro capacitors, they store 9x as much energy as conventional

    https://newscenter.lbl.gov/2024/05/06//groundbreaking-microcapacitors-could-power-chips-of-the-future/ Scientists from MIT and University of California have achieved record-high energy and power densities in microcapacitors, they store 9x as much energy and provide 170x the power than best...
  2. fromport

    Megarevo 8K Firmware Update

    This is now the 2nd day that my MR is failing to charge the batteries and instead feeds back into the grid: Last "normal" day, behaving as expected: During the night using the batteries, sunrise -> take over the house load and then start charging the batteries, as soon as batteries are full...
  3. fromport

    Old SMA inverter error IMAX disturbance

    This might help: https://www.electriciansforums.net/threads/intermittent-disturbance-on-sunny-boy-inverter.32120/
  4. fromport

    Off topic, EV vehicle opinions…

    The new Tesla CyberTruck has steer-by-wire. For more info: https://e-vehicleinfo.com/global/tesla-cybertrucks-steering-by-wire-and-rear-wheel-steering/
  5. fromport

    Off topic, EV vehicle opinions…

    Down a fact ? Are you sure? Right....
  6. fromport

    Off topic, EV vehicle opinions…

    I did not have enough taxes to pay to get the $7500 IRS, and the lease company deducted $6000 (or so) from the amount I owed on the lease. For me it would have been better, even when I would have bought out at end of lease to lease first. I have leased so far: nissan leaf EV 2 x toyota RAV4EV 2...
  7. fromport

    Off topic, EV vehicle opinions…

    I leased a Chevy Bolt premier for 35x$230/month (first month was free and including local tax) so a total of $8,050 over 3 years/36,000 miles I got $4,500 upfront after leasing from California Clean Air act. So my costs (apart from (solar)fuel/tires/insurance) was $3,550 That means I paid...
  8. fromport

    Natron Energy opens new sodium-ion battery facility in West Michigan

    https://wwmt.com/news/local/natron-energy-sodium-ion-battery-technology-manufacturer-holland-michigan-plant-watts-lithium-industry-back-up-power-generator "Compared to the lithium-ion battery, the sodium-ion charges faster and lasts longer" =======================...
  9. fromport

    EG4 18Kpv Rapid Shutdown - No clear instructions

    Are you sure ? When I installed a couple of solaredge inverters, each PV module had an optimizer and when I had 10 optimizers in series I would measure something like 10 volt in total at the end when the inverter was turned off. According to the spec sheet of TS4-A-F Without a keep alive...
  10. fromport

    EG4 18Kpv Rapid Shutdown - No clear instructions

    Don't you mean 1 Volt per RSD ? When an RSD device is not enabled it will give roughly 1 volt per device. In your case 10 panels/RSD devices in series so the input of your inverter you should see 10 Volt.
  11. fromport

    Off topic, EV vehicle opinions…

    The U.S. Department of Energy (DOE) has a program called the Electric Vehicle (EV) Fleet Modernization Initiative, which aims to help federal agencies transition their vehicle fleets to electric vehicles. According to the DOE’s website, the initiative has helped federal agencies purchase over...
  12. fromport

    Off topic, EV vehicle opinions…

    A record 1.2 million U.S. vehicle buyers chose to go electric last year, according to estimates from Kelley Blue Book, a Cox Automotive company. More specifically, 1,189,051 new electric vehicles (EVs) were put into service as the slow shift to an electrified future continued unabated. In 2023...
  13. fromport

    Changes to U.S. Module Regulations/Pricing on the Horizon

    https://pv-magazine-usa.com/2024/04/17/bifacial-panels-representing-98-of-u-s-solar-imports-may-soon-be-subject-to-tariffs/ News from Roth Capital Partners suggests that the bifacial exemption for solar modules in the U.S. may be revoked in May, leading to a projected 15% increase in module...
  14. fromport

    Who’s Afraid of Retail Electricity Rate Reform?

    https://energyathaas.wordpress.com/2023/04/17/whos-afraid-of-retail-electricity-rate-reform/ Who’s Afraid of Retail Electricity Rate Reform? California just moved one step closer to changing the way households pay for electricity. If all goes according to these newly proposed plans...
  15. fromport

    Pulsed charging enhances the service life of lithium-ion batteries.

    https://onlinelibrary.wiley.com/doi/10.1002/aenm.202400190 has more info and link to the study itself (14 pages) . Reading it now.
  16. fromport

    Pulsed charging enhances the service life of lithium-ion batteries.

    “Lithium-ion batteries are powerful, and they are used everywhere, from electric vehicles to electronic devices. However, their capacity gradually decreases over the course of hundreds of charging cycles. The best commercial lithium-ion batteries with electrodes made of so-called NMC532 and...
  17. fromport

    Megarevo 8K Firmware Update

    I was helped a lot by the feedback/help from @WrenchLight who helped me more than support of MR ever did ! As long as it keeps working, I will keep using it. But I would never advise the unit for a new setup.
  18. fromport

    Megarevo 8K Firmware Update

    So far it is performing as expected for me. single unit with 24kWh batteries
  19. fromport

    analyze disturbances that involve the widespread reduction of inverter-based resources

    https://www.nerc.com/comm/RSTC_Reliability_Guidelines/NERC_2022_Odessa_Disturbance_Report%20(1).pdf Executive Summary The ERO Enterprise continues to analyze disturbances that involve the widespread reduction of inverter-based resources in order to identify systemic reliability issues, support...
  20. fromport

    New solar install, wrong microinverters used

    Thanks for enlightening me ! TIL.
  21. fromport

    New solar install, wrong microinverters used

    Original setup: 17 x 350 = 5,950 watt AC modified setup: 4 x 1500 + 375 = 6375 watt AC Afaik most inverters (string or micro) can do a little bit over their rated specs. Some of them are software limited (eg Sunnyboy/fronius 3.8kW units to not go over the 16 amps (80% of a 20 amp breaker)) for...
  22. fromport

    New solar install, wrong microinverters used

    So instead of 17 x $208.25 = $3540.25 they installed 4 x $505.75 = $2023 + $208.25 = $2231.25 Plus less mounting materials, less hours on the roof. All of that is in _their_ favor, not yours and they did it without notifying you. I think you should have a more thorough talk with them.
  23. fromport

    Experience sharing - Buying a 51.2v 14.33KWH Wall mount battery pack from Shenzhen Basen Tech (US stock)

    I think this is the same unit: https://www.alibaba.com/product-detail/Ce-Approved-48v-200AH-10kwh-20kwh_1600869934046.html They claim it will be shipped from their EU warehouse and in the cart, ready to be shipped to California with payment of a Credit Card: With paypal: That would be...
  24. fromport

    GEM Car Lithium Conversion - DIY batteries are awesome for cars!

    Could this be a solution: yellow = negative red = positive. Probably have to buy a few new longer connections
  25. fromport

    Climate change, COVID, and other things...

    I will stick to things like record snow in California & massive fire in TX. There is climate change, no matter how hard you try to say it is nothing.
  26. fromport

    Climate change, COVID, and other things...

    So that happens all over the world, every location where they measure according to certain standards (1.25-2meter above ground) https://en.wikipedia.org/wiki/Atmospheric_temperature They all get higher readings, all over the world, and it is the local environment around the sensor that does...
  27. fromport

    Climate change, COVID, and other things...

    So these temperatures are manually increased every year?
  28. fromport

    EG4 new AIO rated 12K output and 18kPV aka "EG4-18Kpv-12LV"

    https://watts247.com/product-category/inverters/luxpower/ is empty "No products were found matching your selection." I doubt they will ever sell another luxpower inverter.
  29. fromport

    EG4 new AIO rated 12K output and 18kPV aka "EG4-18Kpv-12LV"

    Back when 247watts was shaking up the market with the luxpower for real low prices, I put myself on the "waitlist" when it would become available again: Today I received their long awaited email: </s> But when I clicked on the provided link...
  30. fromport

    Nearly all new US power plants built in 2024 will be clean energy

    Comment from a reddit poster: Some power plants do nothing but things like correct grid frequency and absorb peaks. This used to be done with gas fired turbines and lots of fuel. Now it's a brick of batteries and some transistors. The first big Australian grid battery cost $65M and makes a...
  31. fromport

    EG4 18kPV Q+A general thread

    I have a copy on my personal website: https://www.dth.net/solar/luxpower/modbus/EG4-18KPV-12LV-Modbus-Protocol.pdf
  32. fromport

    Nearly all new US power plants built in 2024 will be clean energy

    https://www.canarymedia.com/articles/clean-energy/chart-nearly-all-new-us-power-plants-built-in-2024-will-be-clean-energy Renewables, batteries and nuclear will add up to 96% of all new power capacity constructed this year, per federal data.
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