Re: [EVDL] Reduce EV: Charging load on the grid ... LEDs (update)
Robert Bruninga via EV wrote: UPDATE: For grins, I had the LEDs from a second bulb. It fully illuminated at the same 80 volts over 14 LEDs at 60 mA, but was 100% linear among the LEDs. Every one of the LEDs started dim and ramped up linearly and identical to each other just as one would expect in a series string. A retest of the original set still showed the totally erratic threshold effect of each of the LEDs flicking on and off until all were on at the same 80vdc and 60 ma. -still unexplained- Don't 'cha just love modern "quality control"? :-) Maybe they got a bag of cheap LEDs with some internal circuit, intended for car lights, blinkie toys, or as low battery detectors. -- Problems that go away by themselves will be back with friends. Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Reduce EV: Charging load on the grid ... LEDs (update)
UPDATE: For grins, I had the LEDs from a second bulb. It fully illuminated at the same 80 volts over 14 LEDs at 60 mA, but was 100% linear among the LEDs. Every one of the LEDs started dim and ramped up linearly and identical to each other just as one would expect in a series string. A retest of the original set still showed the totally erratic threshold effect of each of the LEDs flicking on and off until all were on at the same 80vdc and 60 ma. -still unexplained- -Original Message- From: Robert Bruninga Sent: Friday, July 27, 2018 10:04 AM To: Electric Vehicle Discussion List Cc: Robert Bruninga Subject: RE: [EVDL] Reduce EV: Charging load on the grid ... LEDs > If you're running the LEDs on 120vac, the voltage drop needed is much larger. The 60W equivalent I just took apart had a full 14 LEDs in series but still used a PWM controller. It took 80 volts DC to get the LED's to their proper brilliance. So just a small resistor will do. This is just the metal disk with the 14 LEDs all in series, no other electronics. What was interesting was that 3 came on at around 15 volts, then more and more came on as the voltage was raised. And they shifted back and forth at various levels until they were all on. Since the bulb was rated at 9 Watts, and assuming 80% PWM efficiency, then I assumed the LED's were rated at 60 mA. And that took 80 volts. All the flashing back and forth as each began to illuminate surprised me. It was almost as if there was a threshold effect. As a new LED decided to illuminate, then the series string suffered due to the greater current and so all the other LED's adjusted. Some ablve and some below threshold. All being in series, it looks like there is a significant variability in their characteristics. But once I hit 80 volts the current above that was linear. But at 80 is also where it got to 60 mA and I did not go much higher. I was using a regulated variable DC supply with no series resistor (Supply was current limited at 120 mA). PS, this divides out to be about 5.7 volts per LED. Much higher than the 2.8 mentioned? Bob ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Reduce EV: Charging load on the grid ... LEDs
Again, it was the LED board only.. No other parts other than the 14 white LED's in series. -Original Message- From: EV On Behalf Of Lee Hart via EV Sent: Friday, July 27, 2018 1:43 PM To: Electric Vehicle Discussion List Cc: Lee Hart Subject: Re: [EVDL] Reduce EV: Charging load on the grid ... LEDs Robert Bruninga via EV wrote: > The 60W equivalent I just took apart had a full 14 LEDs in series but > still used a PWM controller. > > It took 80 volts DC to get the LED's to their proper brilliance. So > just a small resistor will do. Right. And a rectifier. :-) 80/120v means a simple series resistor would make it 67% effient. Not bad. 40v at 60ma is 2.4 watts of waste heat. > What was interesting was that 3 came on at around 15 volts, then more > and more came on as the voltage was raised. And they shifted back and > forth at various levels until they were all on. My guess is that there is more to the circuit than may appear. The flashing could be a side effect of the PWM circuit's "brownout" characteristics. It's also possible that there are other parts inside the LED package itself, too. Some are designed for applications like 5v indicators or 12v car lights, and have their own internal regulator or limiter. All these LED lights are made in China. They will use whatever part falls to hand this week, regardless of its specs or source. > PS, this divides out to be about 5.7 volts per LED. Much higher than > the 2.8v mentioned? Was that actually measured at the LED? Or just 80v at the PWM input, divided by 14 LEDs? It is likely that the PWM itself has a considerable voltage drop, so this won't properly estimate the LED voltage. It's also possible that each LED actually has more than one chip inside. The 2.8v I used in my example was for the red LEDs inside a cheap car tail light. That's actually rather high for red -- typical red LEDs are usually 1.6-1.8v. But they were driving these red LEDs at excessive currents; about 100ma, when the part's data sheet says 60ma absolute maximum. (This is unfortunately a common practice). White LED voltages are generally higher; in the 3.x volt range. -- Problems that go away by themselves will be back with friends. Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Reduce EV: Charging load on the grid ... LEDs
Robert Bruninga via EV wrote: The 60W equivalent I just took apart had a full 14 LEDs in series but still used a PWM controller. It took 80 volts DC to get the LED's to their proper brilliance. So just a small resistor will do. Right. And a rectifier. :-) 80/120v means a simple series resistor would make it 67% effient. Not bad. 40v at 60ma is 2.4 watts of waste heat. What was interesting was that 3 came on at around 15 volts, then more and more came on as the voltage was raised. And they shifted back and forth at various levels until they were all on. My guess is that there is more to the circuit than may appear. The flashing could be a side effect of the PWM circuit's "brownout" characteristics. It's also possible that there are other parts inside the LED package itself, too. Some are designed for applications like 5v indicators or 12v car lights, and have their own internal regulator or limiter. All these LED lights are made in China. They will use whatever part falls to hand this week, regardless of its specs or source. PS, this divides out to be about 5.7 volts per LED. Much higher than the 2.8v mentioned? Was that actually measured at the LED? Or just 80v at the PWM input, divided by 14 LEDs? It is likely that the PWM itself has a considerable voltage drop, so this won't properly estimate the LED voltage. It's also possible that each LED actually has more than one chip inside. The 2.8v I used in my example was for the red LEDs inside a cheap car tail light. That's actually rather high for red -- typical red LEDs are usually 1.6-1.8v. But they were driving these red LEDs at excessive currents; about 100ma, when the part's data sheet says 60ma absolute maximum. (This is unfortunately a common practice). White LED voltages are generally higher; in the 3.x volt range. -- Problems that go away by themselves will be back with friends. Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Reduce EV: Charging load on the grid ... LEDs
> If you're running the LEDs on 120vac, the voltage drop needed is much larger. The 60W equivalent I just took apart had a full 14 LEDs in series but still used a PWM controller. It took 80 volts DC to get the LED's to their proper brilliance. So just a small resistor will do. This is just the metal disk with the 14 LEDs all in series, no other electronics. What was interesting was that 3 came on at around 15 volts, then more and more came on as the voltage was raised. And they shifted back and forth at various levels until they were all on. Since the bulb was rated at 9 Watts, and assuming 80% PWM efficiency, then I assumed the LED's were rated at 60 mA. And that took 80 volts. All the flashing back and forth as each began to illuminate surprised me. It was almost as if there was a threshold effect. As a new LED decided to illuminate, then the series string suffered due to the greater current and so all the other LED's adjusted. Some ablve and some below threshold. All being in series, it looks like there is a significant variability in their characteristics. But once I hit 80 volts the current above that was linear. But at 80 is also where it got to 60 mA and I did not go much higher. I was using a regulated variable DC supply with no series resistor (Supply was current limited at 120 mA). PS, this divides out to be about 5.7 volts per LED. Much higher than the 2.8 mentioned? Bob ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Reduce EV: Charging load on the grid ... (bad LED power ckts)
Robert Bruninga via EV wrote: I am now seeing LED bulb failures. A total of 6 so far, and every one of them is not the LED's but the power circuit. I run them through a band saw to remove the "pingpong" plastic dome and remove two screws and the flat LED PCB Simply unplugs from pins on the power circuit. The LEDs themselves are always good. I use the LED circuit board as-is in other lower voltage lighting projects. My experience is similar. The cost-cutting is going so deep that the near-junk parts do not last. The same thing happened to compact fluorescents. You don't get the promised life... not because the fluorescent tube fails, but because the electronics that drive it fail. Luckily, you can easily replace the failed circuit in an LED light with a simple series resistor and capacitor. -- Problems that go away by themselves will be back with friends. Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Reduce EV: Charging load on the grid ...
ROBERT via EV wrote: The other advance that made LED lighting possible was low cost PWM LED drivers on a chip or with few components. Even today an LED cannot take a continuous high current. I agree with Cor. LED prices and efficiency have improved markedly, which is what has made them practical for lighting. But there is no reason a high-tech PWM driver is required. A simple dropping resistor works. I don't know of any LED that can't operate at a continuous current. The resistor wastes a little power, of course. Good design practice is to use it when 80-90% of the supply voltage is still going to the LEDs. For example, an LED car tail light will have four LEDs in series, each having a 2.8v drop for a total of 11.2v. The series resistor only needs to drop the remaining voltage. Since a car's electrical system delivers about 13.5v to the tail light socket, the resistor drops 13.5-11.2 = 2.3v. That's 83% overall efficiency. A consumer-grade PWM circuit isn't going to be any more than 90% efficient; hardly worth the bother. If you're running the LEDs on 120vac, the voltage drop needed is much larger. But as Cor said, you can use a series capacitor instead of a resistor. Capacitors drop the voltage by shifting the power factor; not by making heat. So the efficiency is in the high 90% range. Again, no PWM needed. PWMs are good a) when dimming, or a large input/output voltage differential is required, b) to impress gadget-happy consumers, and c) c) for marketing and to enhance profit. -- Problems that go away by themselves will be back with friends. Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Reduce EV: Charging load on the grid ... (bad LED power ckts)
I am now seeing LED bulb failures. A total of 6 so far, and every one of them is not the LED's but the power circuit. I run them through a band saw to remove the "pingpong" plastic dome and remove two screws and the flat LED PCB Simply unplugs from pins on the power circuit. The LEDs themselves are always good. I use the LED circuit board as-is in other lower voltage lighting projects. Bob -Original Message- From: EV On Behalf Of ROBERT via EV Sent: Wednesday, July 25, 2018 6:56 PM To: Electric Vehicle Discussion List Cc: ROBERT ; brucedp5 Subject: Re: [EVDL] Reduce EV: Charging load on the grid ... The other advance that made LED lighting possible was low cost PWM LED drivers on a chip or with few components. Even today an LED cannot take a continuous high current. ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Reduce EV: Charging load on the grid ...
The other advance that made LED lighting possible was low cost PWM LED drivers on a chip or with few components. Even today an LED cannot take a continuous high current. From: EV on behalf of Cor van de Water via EV Sent: Wednesday, July 25, 2018 2:46 PM To: Electric Vehicle Discussion List Cc: Cor van de Water; brucedp5 Subject: Re: [EVDL] Reduce EV: Charging load on the grid ... Bruce, If you ever saw the old LEDs, I received one from my dad in the early 80s and while their life is astonishing, they will run for decades and still work, they are no comparison to modern LEDs for 2 major reasons: - There was no white. LEDs came in red, yellow, green and that was pretty much it. At some point someone figured out a way to make blue and it took until the beginning of this millennium before white LEDs became generally available, made from a very shortwave LED illuminating a white phosphor which released the white light. The amount of light delivered was not very high in any of these, which is the second reason: - Efficiency. While TL and CFL (fluorescent) bulbs were several times more efficient than incandescents, the LEDs were great as indicator lights but horrible as light source due to their low light output. Over time that has improved to the point that there are now LEDs that you must not drive with more than 1mA if you want people to look at them directly, because they are so blindingly bright. That is why a 10 Watt LED can comfortably replace a 60 – 100W incandescent lamp and even provide much the same soft warm light profile so a casual observer is unable to distinguish between the two used side by side, except for the waste heat produced by the incandescent. Regards, Cor. Sent from Mail for Windows 10 From: brucedp5 via EV Sent: Wednesday, July 25, 2018 2:28 PM To: ev@lists.evdl.org Cc: brucedp5 Subject: [EVDL] Reduce EV: Charging load on the grid ... [ref http://electric-vehicle-discussion-list.413529.n4.nabble.com/Charging-load-on-the-grid-NOT-tp4690636.html ] % Here's a link to help/support what Lawrence posted about: https://en.wikipedia.org/wiki/LED_lamp A LED lamp or LED light bulb is an electric light for use in light fixtures that produces light using light-emitting diode (LED). ... As of 2016, LEDs use only about 10% of the energy an incandescent lamp requires ... [some brucedp history] ... after finishing my Vietnam era 70-74 military requirement and was 'back in the world' https://www.google.com/search?q=vietnam+back+in+the+world (U.S.A.), leds were not (but should have been) well marketed for use as lighting. Old school thinking still touted using more (up-front) expensive flouresent lighting to save electricity costs over (ancient-tech) incandescents. I had a hard time understanding that when leds were (as Lawrence mentioned) so much more energy efficient. But then back then, I also had a hard time breathing the raw gasoline fumes as ice drove by, and the lack of vapor controls at gas pumps. [fast-forward 4 decades] ... as I previously posted, I am making efforts to relocate closer to the San Antonio (SA), TX VA (Veterans) Hospital facility (VA sez I can't get assigned there until I have a SA mailing address - think old school government/military paper metrics). Until then, I am running back and forth between where I have been staying since the beginning of the year (near the Temple, TX VA Hospital) and going hours south to work with a SA Realtor. The owners of the place I am staying at have been kind to me. Locals wonder why I am paying twice as much for a room at this business rather than at an apt at half the cost (and a 1yr long lease). But it seems my continuous monthly stay is funding repairs and upgrades for the owners ... When the 4ft dual tube flouresent ceiling light fixture https://www.1000bulbs.com/product/29538/PLAS-1LT1.html?gclid=EAIaIQobChMI54O_ooG73AIVAqrsCh2RgAF3EAkYAyABEgIubvD_BwE in my room started flickering, the owner replaced it with a 1ft x 1ft 12W led ceiling panel https://www.ebay.com/itm/64W-42W-36W-18W-LED-Troffer-Panel-Light-Recessed-Dropped-Ceiling-Down-Fixture-US/163163165493 The owner also replaced some of their outdoor florescent lighting with these led panels. They are bright, cost effective, and will have a much longer life. Below are links to newswire items. The 1st is how off peak charging lets UK EV charging use the existing grid (hopefully they will still be planning grid upgrades over time). The 2nd is how EV ignorant IL media says L2 charging will blow up existing pole transformers (don't you just love their stoopid statements that are really just their opinions?). And 3rd,once again north-western European countries are showing the way to be green by reducing ice-generator use to power festivals: % https://www.fleetnews.co.uk/news/environment/2018/07/25/ofgem-to-incentivise-ev-owners-to-charge-off-peak Ofgem to incentivise EV owners to charge off-peak 25/07/2018 -10 hours
Re: [EVDL] Reduce EV: Charging load on the grid ...
I have home-built LED lights with nothing more than a current limiting capacitor, bridge rectifier and small series resistors to reduce surge current spikes. Obviously no galvanic isolation, but many Chinese LEDs have no isolation either. Cor. Sent from Mail for Windows 10 From: ROBERT Sent: Wednesday, July 25, 2018 3:56 PM To: Electric Vehicle Discussion List Cc: Cor van de Water; brucedp5 Subject: Re: [EVDL] Reduce EV: Charging load on the grid ... The other advance that made LED lighting possible was low cost PWM LED drivers on a chip or with few components. Even today an LED cannot take a continuous high current. From: EV on behalf of Cor van de Water via EV Sent: Wednesday, July 25, 2018 2:46 PM To: Electric Vehicle Discussion List Cc: Cor van de Water; brucedp5 Subject: Re: [EVDL] Reduce EV: Charging load on the grid ... Bruce, If you ever saw the old LEDs, I received one from my dad in the early 80s and while their life is astonishing, they will run for decades and still work, they are no comparison to modern LEDs for 2 major reasons: - There was no white. LEDs came in red, yellow, green and that was pretty much it. At some point someone figured out a way to make blue and it took until the beginning of this millennium before white LEDs became generally available, made from a very shortwave LED illuminating a white phosphor which released the white light. The amount of light delivered was not very high in any of these, which is the second reason: - Efficiency. While TL and CFL (fluorescent) bulbs were several times more efficient than incandescents, the LEDs were great as indicator lights but horrible as light source due to their low light output. Over time that has improved to the point that there are now LEDs that you must not drive with more than 1mA if you want people to look at them directly, because they are so blindingly bright. That is why a 10 Watt LED can comfortably replace a 60 – 100W incandescent lamp and even provide much the same soft warm light profile so a casual observer is unable to distinguish between the two used side by side, except for the waste heat produced by the incandescent. Regards, Cor. Sent from Mail for Windows 10 From: brucedp5 via EV Sent: Wednesday, July 25, 2018 2:28 PM To: ev@lists.evdl.org Cc: brucedp5 Subject: [EVDL] Reduce EV: Charging load on the grid ... [ref http://electric-vehicle-discussion-list.413529.n4.nabble.com/Charging-load-on-the-grid-NOT-tp4690636.html ] % Here's a link to help/support what Lawrence posted about: https://en.wikipedia.org/wiki/LED_lamp A LED lamp or LED light bulb is an electric light for use in light fixtures that produces light using light-emitting diode (LED). ... As of 2016, LEDs use only about 10% of the energy an incandescent lamp requires ... [some brucedp history] ... after finishing my Vietnam era 70-74 military requirement and was 'back in the world' https://www.google.com/search?q=vietnam+back+in+the+world (U.S.A.), leds were not (but should have been) well marketed for use as lighting. Old school thinking still touted using more (up-front) expensive flouresent lighting to save electricity costs over (ancient-tech) incandescents. I had a hard time understanding that when leds were (as Lawrence mentioned) so much more energy efficient. But then back then, I also had a hard time breathing the raw gasoline fumes as ice drove by, and the lack of vapor controls at gas pumps. [fast-forward 4 decades] ... as I previously posted, I am making efforts to relocate closer to the San Antonio (SA), TX VA (Veterans) Hospital facility (VA sez I can't get assigned there until I have a SA mailing address - think old school government/military paper metrics). Until then, I am running back and forth between where I have been staying since the beginning of the year (near the Temple, TX VA Hospital) and going hours south to work with a SA Realtor. The owners of the place I am staying at have been kind to me. Locals wonder why I am paying twice as much for a room at this business rather than at an apt at half the cost (and a 1yr long lease). But it seems my continuous monthly stay is funding repairs and upgrades for the owners ... When the 4ft dual tube flouresent ceiling light fixture https://www.1000bulbs.com/product/29538/PLAS-1LT1.html?gclid=EAIaIQobChMI54O_ooG73AIVAqrsCh2RgAF3EAkYAyABEgIubvD_BwE in my room started flickering, the owner replaced it with a 1ft x 1ft 12W led ceiling panel https://www.ebay.com/itm/64W-42W-36W-18W-LED-Troffer-Panel-Light-Recessed-Dropped-Ceiling-Down-Fixture-US/163163165493 The owner also replaced some of their outdoor florescent lighting with these led panels. They are bright, cost effective, and will have a much longer life. Below are links to newswire items. The 1st is how off peak charging lets UK EV charging use the existing grid (hopefully they will still be planning grid upgrades over time). The 2nd is how EV ignorant IL media says L2 charging will blow up
Re: [EVDL] Reduce EV: Charging load on the grid ...
Bruce, If you ever saw the old LEDs, I received one from my dad in the early 80s and while their life is astonishing, they will run for decades and still work, they are no comparison to modern LEDs for 2 major reasons: - There was no white. LEDs came in red, yellow, green and that was pretty much it. At some point someone figured out a way to make blue and it took until the beginning of this millennium before white LEDs became generally available, made from a very shortwave LED illuminating a white phosphor which released the white light. The amount of light delivered was not very high in any of these, which is the second reason: - Efficiency. While TL and CFL (fluorescent) bulbs were several times more efficient than incandescents, the LEDs were great as indicator lights but horrible as light source due to their low light output. Over time that has improved to the point that there are now LEDs that you must not drive with more than 1mA if you want people to look at them directly, because they are so blindingly bright. That is why a 10 Watt LED can comfortably replace a 60 – 100W incandescent lamp and even provide much the same soft warm light profile so a casual observer is unable to distinguish between the two used side by side, except for the waste heat produced by the incandescent. Regards, Cor. Sent from Mail for Windows 10 From: brucedp5 via EV Sent: Wednesday, July 25, 2018 2:28 PM To: ev@lists.evdl.org Cc: brucedp5 Subject: [EVDL] Reduce EV: Charging load on the grid ... [ref http://electric-vehicle-discussion-list.413529.n4.nabble.com/Charging-load-on-the-grid-NOT-tp4690636.html ] % Here's a link to help/support what Lawrence posted about: https://en.wikipedia.org/wiki/LED_lamp A LED lamp or LED light bulb is an electric light for use in light fixtures that produces light using light-emitting diode (LED). ... As of 2016, LEDs use only about 10% of the energy an incandescent lamp requires ... [some brucedp history] ... after finishing my Vietnam era 70-74 military requirement and was 'back in the world' https://www.google.com/search?q=vietnam+back+in+the+world (U.S.A.), leds were not (but should have been) well marketed for use as lighting. Old school thinking still touted using more (up-front) expensive flouresent lighting to save electricity costs over (ancient-tech) incandescents. I had a hard time understanding that when leds were (as Lawrence mentioned) so much more energy efficient. But then back then, I also had a hard time breathing the raw gasoline fumes as ice drove by, and the lack of vapor controls at gas pumps. [fast-forward 4 decades] ... as I previously posted, I am making efforts to relocate closer to the San Antonio (SA), TX VA (Veterans) Hospital facility (VA sez I can't get assigned there until I have a SA mailing address - think old school government/military paper metrics). Until then, I am running back and forth between where I have been staying since the beginning of the year (near the Temple, TX VA Hospital) and going hours south to work with a SA Realtor. The owners of the place I am staying at have been kind to me. Locals wonder why I am paying twice as much for a room at this business rather than at an apt at half the cost (and a 1yr long lease). But it seems my continuous monthly stay is funding repairs and upgrades for the owners ... When the 4ft dual tube flouresent ceiling light fixture https://www.1000bulbs.com/product/29538/PLAS-1LT1.html?gclid=EAIaIQobChMI54O_ooG73AIVAqrsCh2RgAF3EAkYAyABEgIubvD_BwE in my room started flickering, the owner replaced it with a 1ft x 1ft 12W led ceiling panel https://www.ebay.com/itm/64W-42W-36W-18W-LED-Troffer-Panel-Light-Recessed-Dropped-Ceiling-Down-Fixture-US/163163165493 The owner also replaced some of their outdoor florescent lighting with these led panels. They are bright, cost effective, and will have a much longer life. Below are links to newswire items. The 1st is how off peak charging lets UK EV charging use the existing grid (hopefully they will still be planning grid upgrades over time). The 2nd is how EV ignorant IL media says L2 charging will blow up existing pole transformers (don't you just love their stoopid statements that are really just their opinions?). And 3rd,once again north-western European countries are showing the way to be green by reducing ice-generator use to power festivals: % https://www.fleetnews.co.uk/news/environment/2018/07/25/ofgem-to-incentivise-ev-owners-to-charge-off-peak Ofgem to incentivise EV owners to charge off-peak 25/07/2018 -10 hours ago Ofgem has set out proposals to support the millions of new electric vehicles (EVs) ... more flexible use of the energy system will allow more EVs to be charged from the existing grid and reduce the need for expensive new power stations and extra grid capacity to be built ... make the electricity system more efficient by giving generators and other users more choice and flexibility on how they connect to the grid
[EVDL] Reduce EV: Charging load on the grid ...
[ref http://electric-vehicle-discussion-list.413529.n4.nabble.com/Charging-load-on-the-grid-NOT-tp4690636.html ] % Here's a link to help/support what Lawrence posted about: https://en.wikipedia.org/wiki/LED_lamp A LED lamp or LED light bulb is an electric light for use in light fixtures that produces light using light-emitting diode (LED). ... As of 2016, LEDs use only about 10% of the energy an incandescent lamp requires ... [some brucedp history] ... after finishing my Vietnam era 70-74 military requirement and was 'back in the world' https://www.google.com/search?q=vietnam+back+in+the+world (U.S.A.), leds were not (but should have been) well marketed for use as lighting. Old school thinking still touted using more (up-front) expensive flouresent lighting to save electricity costs over (ancient-tech) incandescents. I had a hard time understanding that when leds were (as Lawrence mentioned) so much more energy efficient. But then back then, I also had a hard time breathing the raw gasoline fumes as ice drove by, and the lack of vapor controls at gas pumps. [fast-forward 4 decades] ... as I previously posted, I am making efforts to relocate closer to the San Antonio (SA), TX VA (Veterans) Hospital facility (VA sez I can't get assigned there until I have a SA mailing address - think old school government/military paper metrics). Until then, I am running back and forth between where I have been staying since the beginning of the year (near the Temple, TX VA Hospital) and going hours south to work with a SA Realtor. The owners of the place I am staying at have been kind to me. Locals wonder why I am paying twice as much for a room at this business rather than at an apt at half the cost (and a 1yr long lease). But it seems my continuous monthly stay is funding repairs and upgrades for the owners ... When the 4ft dual tube flouresent ceiling light fixture https://www.1000bulbs.com/product/29538/PLAS-1LT1.html?gclid=EAIaIQobChMI54O_ooG73AIVAqrsCh2RgAF3EAkYAyABEgIubvD_BwE in my room started flickering, the owner replaced it with a 1ft x 1ft 12W led ceiling panel https://www.ebay.com/itm/64W-42W-36W-18W-LED-Troffer-Panel-Light-Recessed-Dropped-Ceiling-Down-Fixture-US/163163165493 The owner also replaced some of their outdoor florescent lighting with these led panels. They are bright, cost effective, and will have a much longer life. Below are links to newswire items. The 1st is how off peak charging lets UK EV charging use the existing grid (hopefully they will still be planning grid upgrades over time). The 2nd is how EV ignorant IL media says L2 charging will blow up existing pole transformers (don't you just love their stoopid statements that are really just their opinions?). And 3rd,once again north-western European countries are showing the way to be green by reducing ice-generator use to power festivals: % https://www.fleetnews.co.uk/news/environment/2018/07/25/ofgem-to-incentivise-ev-owners-to-charge-off-peak Ofgem to incentivise EV owners to charge off-peak 25/07/2018 -10 hours ago Ofgem has set out proposals to support the millions of new electric vehicles (EVs) ... more flexible use of the energy system will allow more EVs to be charged from the existing grid and reduce the need for expensive new power stations and extra grid capacity to be built ... make the electricity system more efficient by giving generators and other users more choice and flexibility on how they connect to the grid ... ... https://www.driving.co.uk/news/electric-car-drivers-use-flexible-charging-save-money-reduce-drain-grid/ Electric car drivers should use 'flexible charging' to save money and reduce drain on grid 24 July 2018 (IL EV-ignorance BS/misinformation) https://springfielddaily.com/technology/springfield-encourages-off-peak-charging-for-electric-cars/ Springfield encourages off peak charging for electric cars Jul 23, 2018 Level 2 chargers use far more power than most residential appliances. Drawing that much power can strain local transformers. Local transformers make it possible for consumers to use the wider grid, but they can only handle so much power at a time. Most transformers are only rated for 10 to 50kVA, and single Level 2 charger can draw 7kV. A cluster of Level 2 chargers could potentially overload the local transformers. This is especially true in the summer months when air conditioners are running and the normal electrical load is much higher. To avoid potential overloads, the city wants Level 2 owners to charge their vehicles in off peak hours ... https://springfielddaily.com/wp-content/uploads/2018/07/transmission.jpg https://www.pv-magazine.com/2018/07/24/festivalgoers-benefit-from-battery-tech-advances/ Festivalgoers benefit from battery tech advances Jul 24, 2018 Greener and Alfen joined forces ... as the “world's first fully mobile and off-grid EV charging hub” ...displace portable diesel generators on the northern European festival scene ... partners removed the tell-tale
