Some feedback we have seen regarding the PFC-50 chargers. ----- Original Message ----- From: "Ralph Merwin" <rmerwin@aracnet.com> To: "Electric Vehicles" <ev@listproc.sjsu.edu> Sent: Monday, September 02, 2002 10:06 AM Subject: 7kwh in 1.5 hours > > I was waffling on driving my Geo Prizm to Woodburn. The 35 mile commute > would drag my 120v pack of NiCads way down, and while I knew the Prizm > could make the trip there, I was unsure of charging at the track to get > home. Rich and Joe were going to have a couple of their PFC 50s there > for the racers, but I didn't know if I'd get enough bulk charging time > on the Big Guy in between the racers getting recharged. > > Rich said "Bring the Darn Car!!! I will personally find away to get you > charged!!!" > > The trip to Woodburn was uneventful (I like uneventful EV trips). There > wasn't much traffic on I-5 from Portland down to Woodburn, so I was able > to cruise at 60-65 and not hinder anyone nor be blocked by the few slower > vehicles. I arrived at the track with the odometer showing about 34 miles > and the E-Meter reading -8.12kwh. > > After fussing around with cables we came up was a setup that bypassed the > wimpy 10 ga charging circuit in my car with 6 ga wires connected straight > to the shunt and positive contactor. Rich, of course, wanted to show how > much power his charger could crank out and proceeded to turn the knob up > (25 amps), and up (50 amps), and then all the way (80 amps). Too much for > the wires we were using, but very impressive to see. Note that the pack > was at about 130v when we were hitting it with 80 amps - just over 10kw! > > After a couple of 80 amp show-n-tells, we turned the knob back down to a > more sedate rate of 50 amps and let the pack soak. After about an hour > and a half, even with a couple of interruptions to recharge racers, my > E-Meter was showing -1.1kwh and was claiming 80% full. > > That's 7kwh back into my pack in less than two hours, and the charger > wasn't running full tilt, nor was it breathing hard! Rich grinned as he > gave me that "Do I see an order for a PFC 50?" look... > > At this point, I gave up my PFC 50 spot, connected my PFC 20 to a 120v > outlet, turned the knob up to 10 amps (17 would pop the breaker) and > let the pack continue charging. My car was fully recharged and ready > for the trip home with a two hours to spare. > > The trip home was also uneventful (did I mention that I like uneventful > trips?), taking about 7.5kwh. > > After seeing the PFC 50 in action and the potential it brings for some > very quick opportunity charges, I did start thinking about upgrading my > charging system. The PFC 20 is OK for everyday commuting use, but when > I need to recharge *fast* I don't have any options right now. If I was > able to recharge *fast* I would be able to use my EV for more trips on > the weekend. Heck, I could even drive my EV into town for lunch during > the week and get a sufficient recharge at Portland's only public charging > station. > > Ralph ----- Original Message ----- From: <RichSJ@aol.com> To: <ev@listproc.sjsu.edu> Sent: Thursday, September 05, 2002 8:42 AM Subject: Wow! Fast chargin' at Woodburn! > > Hi to all, > > I went to Woodburn with my Manzanita Micro PFC-20 charger (ugly box, serial #2), happy > that I'd be able to pump 15 to 25 amps into my Dualin'7. I have two strings of big 42ah > Hawkers, so I don't need that much charge after a run down the drag strip. HAH! That's > what I thought. > > After my first run, the battery warm-up run, I plugged in my PFC-20 to give my batteries > a little drink of juice. Hmmm...15 amps, good; I thought. I talked to a few people and took > a look at a few cars and came back to the car to check the voltage on my pack...164V...this > is going to take a while. I took my next run at pretty much full charge, but that's only > because the junior dragsters took so long to get through their runs. > > On my third run I drove into the water box. With my rear tires sitting in a little water > I armed the controller bypass switch and stomped on the go pedal. The tires did a very > satisfying smoky burn-out that sent the D'7 screaming toward the staging lights! Well, > that and the 1/4 mile was more heat than the Kilovac EV500 could take and at the end of > the strip I had to pull the circuit breakers to stop. I pulled into the return lane and > pulled off into the grass. It took a trip to the pits for my ohm meter and a few dead > cycles of the Kilovac to get running again. > > By the time I got back to the pits, I thought there was no way I was going to get fully > charged again. (sound of a cavalry bugle call and horse hooves) Rich Rudman offered to > let me hook up to the ***PFC-50***!! Cool! I hooked up my 4ga charge cord and watched > the voltage rise on my E-meter as Rich turned up the amps on the PFC-50. I yelled out > the volts and quickly switched the e-meter to read amps. 165V...25amps...170V...30amps > ...176V that's enough Rich! He told me to check the amps again. I quickly pressed the > button on the E-meter...GEEEZ!...60 AMPS! > > Needless to say, I was fully charged for the next run. It was a new NEDRA record, 14.725! > I kept using the incredible PFC-50 for charging after each run. I set the record for SC/E > again on a latter run. > > I can thankfully say that the new record was made possible by Rich Rudman and Joe Smalley > and their wonderful creation the PFC-50 charger. > > Rich, who says you didn't set a record at Woodburn this year? Not me. > > Rich Brown > Dualin'7 NEDRA SC/E and SC/F record holder ----- Original Message ----- From: "John Wayland" <dat1200@europa.com> To: <ev@listproc.sjsu.edu> Sent: Friday, September 06, 2002 8:06 AM Subject: Re: Wow! Fast chargin' at Woodburn! > Hello to All, > > RichSJ@aol.com wrote: > > > > By the time I got back to the pits, I thought there was no way I was going to get fully > > charged again. (sound of a cavalry bugle call and horse hooves) Rich Rudman offered to > > let me hook up to the ***PFC-50***!! Cool! I hooked up my 4ga charge cord and watched > > the voltage rise on my E-meter as Rich turned up the amps on the PFC-50. I yelled out > > the volts and quickly switched the e-meter to read amps. 165V...25amps...170V...30amps > > ...176V that's enough Rich! He told me to check the amps again. I quickly pressed the > > button on the E-meter...GEEEZ!...60 AMPS! > > Sorry Rich, but 60 amps sounds a bit wimpy after seeing my dump charger send a ballsy 279 amps > into my Hawkers! > > As part of ther OEVA 'EV Awareness Day' excitement, on that morning my race car's dump charger > parallel-series protection circuits were inadvertantly 'tested' when there was a short > circuit/fire in the trunk of the car (thankfully, no plasma this time)! Since then, the > protection circuits have been worked on and are still being modified, and an all new system > was built which included beefier charge wires to pass more current. Though after the first 15 > seconds or so the dump charger drops to something more like 140 amps, the last dump charge of > the day (when the 17 host Optimas had been cycled a few times and were really rock'n) showed > that massive 279 amps of initial current flow....now there's a 'Wow!' > > Dump charging used to take about 8 minutes, with an 80% charge in the first three minutes, but > Sunday that time was closer to 5 minutes for the whole thing! > > Not to take away from Rich and Joe's wonderful chargers....it was my mighty PFC20 with the > buck enhancer, that kept the dump charger's 17 Optimas fully charged, via the10kw generator > that helped charge other EVer's throughout the day as well (thanks, Daniel Eyk for loaning it > to me). My PFC20 has been tweaked a little by the MadMan and can push 30 amps into the Heavy > Metal Garden Tractor! I used to use my 'Ugly Box' capacitor charger for this duty, but last > Sunday it was left at home and the PFC20 took over...what a great charger! > > The day after the races, that same PFC20 was placed in Jon Sheer's Honda's back seat and it > helped to get him home by working in conjunction with another Manzanita Micro charger to > convert the tow-behind-generator's AC juice into battery charging DC. These powerful and > flexible chargers are the best I've ever used...period! > > See Ya........John Wayland ----- Original Message ----- From: <RichSJ@aol.com> To: <ev@listproc.sjsu.edu> Sent: Friday, September 06, 2002 12:38 PM Subject: Re: Wow! Fast chargin' at Woodburn! > John Wayland wrote: > > > Sorry Rich, but 60 amps sounds a bit wimpy after seeing my > > dump charger send a ballsy 279 amps into my Hawkers! > > Yeah, I've done 250+ amps from a dump charge pack too, but > I've never done 60 amps from a little portable charger that > can clamp voltage at what ever point you want. Just hook up, > dump (relatively) big amps in and walk away and enjoy > Woodburn! My pack was always ready for the next run without > any fuss, without worry or watching voltage rise. > > > These powerful and flexible chargers are the best I've ever > > used...period! > > Yep. Me too! > > Rich Brown > Dualin'7 ----- Original Message ----- From: "Bruce EVangel Parmenter" <brucedp@yahoo.com> To: <ev@listproc.sjsu.edu> Sent: Saturday, September 21, 2002 10:54 PM Subject: PFC-50 testing > I have been using the PFC-50 at low charging currents off a > 120VAC 20 amp circuit. I was able to set the finishing > charge voltage level with the trim pod and a jewelers screw > driver from the front panel. > > But that is only the first step to being ready to connect to > a higher capacity power source and turn the charging current > higher. > > Today at the Silicon Valley Rally I made a 10-3 14-50 > extension cable to connect the PFC-50 EV charger to a 15-40 > outlet with a 40 amp breaker in the EV charging area. > > I need to know at what AC amps into the PFC-50 relates to > what DC amps into my pack. I asked one of the EAA members to > connect his Fluke 40 to the panel he had made just for > measurements like this. > > My pack was only down by 7 miles, using 2.1 ah per mile on a > 132V US145 pack (about 100 ahs of capacity). The 208VAC feed > from Stanford read 204 VAC under load at the outlet. > > I cranked the current knob on the PFC-50 charger until I was > drawing 30 AC amps. My cruising control emeter was reading > 36.6 DC amps into my pack. I left the know at the setting > for 15 minutes. The AC draw remained constant (6 kw), the DC > amps in changed as the pack voltage rose. > > I then cranked the current knob until I reached a 40 AC amp > draw into the PFC-50. I was getting 44 amps DC into my > pack. > > This tells me that when I connect the PFC-50 to a public > AVCON charging head using an AVCON adaptor, if I read a 40 > DC amp charge current going into my pack at the beginning of > my charge and do not change the knob setting, I will pump > about 6kw into my pack and not trip either the AVCON > charging head or the host 40 amp circuit breaker. I will > need to prove this setting works to verify my readings. > > Tripping the host's breaker is not what we want to do. > Imagine tripping the breaker at Costco and what a pain it > will be to get them to reset it. Also the sigma of them > remembering that EVs keep tripping breakers is really bad. > > Since the PFC-50 has much more charging capacity, I plan to > find a 220VAC 50amp outlet to open the PFC-50 charger to its > maximum and see what current I can achieve. > > This will be a good test to know how long it would take to > charge if the PFC-50 on a 14-50 220VAC 50 amp outlet was my > only charing source. > > There is just such a scenario, if I were to challenge a trip > from San Jose to LA, at the Atascadero Circle K. They have > a 14-50 50 amp outlet on the outside next to the front > door. > > My guesstimate is that I would get 72 amps from the PFC-50 > in this configuration. I get 3 miles back for every hour of > charge at 10 DC amps into my pack. So I should get 21+ miles > back for every hour of charge at a 72 DC amp rate into my > pack. > > Since this is the last stop before a long steep grade to > reach San Luis Obispo, I would not do just a simple > opportunity charge to recoup the miles used. I would spend > an extra hour to ensure a full charge. This should make my > recharge time about 3 hours (2 hours to recoup + 1 hour to > reach 100% (minus a finishing charge to balance the pack). > > More on the PFC-50 testing as I do it. > :-zzz > > ===== > ' ____ > ~/__|o\__ > '@----- @'---(= > . http://geocities.com/brucedp > . EV List Editor & RE newswires > . http://egroups.com/group/evangel > ===== > ----- Original Message ----- From: "Bruce EVangel Parmenter" <brucedp@yahoo.com> To: <ev@listproc.sjsu.edu> Sent: Saturday, September 21, 2002 11:07 PM Subject: Re: PFC-50 testing > Additional: > > The Fluke 40 read the PFC-50 with a .98 power factor or 98%. > > I shut down and disconnected the PFC-50 and connected my > on board the NG5 to the same outlet. I was drawing 35 AC > amps with 30 DC amps going into my pack. The Fluke 40 read > the NG5 with a .72 power factor or 72%. > > Obviously the PFC-50 is work great and the NG5 is much > more wasteful which puts less into your pack for the AC > current draw, and the low power factor correction does > not allow the NG5 to be used with the AVCON charging head. > > :-zzz > > ===== > ' ____ > ~/__|o\__ > '@----- @'---(= > . http://geocities.com/brucedp > . EV List Editor & RE newswires > . http://egroups.com/group/evangel > ===== ----- Original Message ----- From: "Bruce EVangel Parmenter" <brucedp@yahoo.com> To: <ev@listproc.sjsu.edu> Sent: Saturday, October 05, 2002 12:18 AM Subject: PFC-50 testing ... > A couple of days ago, I decided not to wait for the separate > charging line to be made for my EV, and just use the 25 ft > 10-3 14-50 extension cable I already have. > > Before my evening class, I went over to Otmar's to mooch > Solar electrons for my test as he had both an AVCON > power pak and a 14-50 50 amp outlet. > > I first connected to his 14-50 50 amp outlet and verified > my clamp on AC meter movement accuracy with Otmar's digital > clamp on AC meter. > > My pack was only 30% down, so readings would have to taken > quickly as at these high charging currents, my pack voltage > will rise and taper the PFC-50 's current. > > At the Stanford Rally on 204VAC at 30 amps AC input the > PFC-50 's output was 36.6 amps at 150VDC. > > On Otmar's 220VAC at 30 amps AC input the PFC-50 's output > was 40 amps DC into my 132V pack at 150VDC. > > I decided to turn the PFC-50 up and see how much power I > would get. At 50 amps on a 25 ft 10-3 extension cable I > dropped 10 VAC, so the reading was 210 VAC at the PFC-50. > > At 210 VAC at 50 amps the PFC-50 output was 72 amps at > 105VDC. I ran the PFC-50 at this power level for 15 minutes. > The 10-3 cable and connectors barely got warm. > > But the output current decreased as the pack voltage rose to > 153VDC. At some point a ticking sound ocurred and > progressively increased in frequency until the yellow limit > led was visible. Otmar believed that was the PFC-50 current > limiting circuit kicking in. > > I then tried the AVCON power pak with a 40 amp AC draw for 5 > minutes. The AVCON power pack nor Otmar's breaker tripped. > But sadly, the AVCON power pak is not the AVCON charging > head used at public charging spots. The funky evi ics-200 > is on the BAAQMD approved list (they don't use them, but > they approved them. Sounds like a back room deal). > > I shutdown by turning the current knob to off while the > PFC-50 breakers were still on. This allowed the PFC-50 to > continue to cool off by letting its fans run. But the amount > of heat coming out of the PFC-50 would not even defrost a > window. My hands says it was under 300 watts. The outside > air was 70 degrees F, so the PFC-50 does not waste much > energy on heat. > > I turned off, disconnected, and left Otmar's with him > discussing how inefficient air powered cars were with a > neighbor. I wanted to get in one more test before class. > > I went a few miles down El Camino to plug in at the Mt. > View Costco. I connected the PFC-50 to their AVCON ics-200 > via my AVCON adpator I got from the EAA http://eaaev.org > (merchandise page). > > I set the PFC-50 to draw 30 AC amps and got 37 amps into my > pack as it was a 208VAC feed. With in a minute and a half > the ics-200 turned off with a red led and the synth-o > woman's voice said over current (slap-slap-slap). > > On a 40 amp circuit, you should be able to get 32 amps AC > out of it by Electrical code. A previous POST by a evi > representative said the ics-200 was spec'd at providing 32 > amps. > > I figured if I set the PFC-50 to 30 amps AC, the ics-200 > AVCON should not have a problem. So, I chose to test the > PFC-50 at 30 amps AC off the evi AVCON ics-200. > > I tried several times, at lower, and lower AC current > levels until I found the ics-200 held at a 14 amp AC > current draw. I didn't stay to test further, as I had to > leave for class. > > ... > After class, I went back to Otmar's to re-check my readings. > All was the same. Otmar thought it might be a bad ics-200. > > This is quite possible. While the evi rep thinks I unjustly > poo-poo the ics-200, but he is not the one in the middle of > nowhere being told by a synthetic woman's voice I can't > have power. > > So it might be that the Mt. View Costco AVCON ics-200 is out > of spec. I need to try other AVCON ics-200 units. > > I am thinking I need to build a 6kw resistive load I can > connect to the AVCON ics-200 charging heads. Then I could > verify a unit will handle a 30 amp AC load. I suppose I > would need a water bath type of cooling unit to dissipate > the power for a 5 minute test. > > :-zzz > > ===== > ' ____ > ~/__|o\__ > '@----- @'---(= > . http://geocities.com/brucedp > . EV List Editor & RE newswires > . (originator of the above EV ascci art) > ===== ----- Original Message ----- From: "Bruce EVangel Parmenter" <brucedp@yahoo.com> To: "Rich Rudman" <rmanzan@tscnet.com> Cc: <joes@worldfront.com> Sent: Sunday, October 20, 2002 12:24 PM Subject: PFC-50 marketing point : measure #2 > Guys, > > I would really need my #2 measured at 30 amps AC input > draw on 208 (or whatever 220VAC you have) for > current spikes and PFC (anything that would trip > the evi ics-200 AVCON). > > I will need that to prove that if the evi ics-200's > still error out with over current drawn, then the > evi ics-200's are not set correctly. > > I can understand that only half the charger was > working, and that caused the reduction of power > output to 6 amps on 120VAC. > > But when I connected the PFC-50 to 208 or higher, > I got full power. > > I hope you all see what I am getting at: > -this is a PFC-50 marketing point. > > People can buy a PFC-20 right now and it will > work on a ics-200 AVCON (I have proven that > repeatedly). > > But why would they pay almost twice as much > as a PFC-20 if the PFC-50 does not work on an > AVCON > > (by not work, I mean to keep from tripping > the evi ics-200, the ac input current has to be > reduced to 14 amps = you are not getting the > full 30 amp power an AVCON provides). > > So, help me guys to help you. > > If the PFC-50 can draw 30 amps through an > evi ics-200 AVCON, then it is worth the > extra cost because the PFC-50 will put out > about twice as much power. > > (Into a 132 VDC pack at 150 VDC surface voltage, > I got 21 amps of charging current when using > the PFC-20 Rich loaned me, and I got 37 amps DC > into my pack when using the PFC-50. Both were > drawing power from an evi ics-200 AVCON which > suppling 30 amps AC current at 208 VAC). > > Consumers will pay for more power if one AVCON > is their only charging source. > > Please take the time to do the measurements and > let me know. > > -Bruce > ----- Original Message ----- From: "Bruce EVangel Parmenter" <brucedp@yahoo.com> To: <ev@listproc.sjsu.edu> Sent: Sunday, November 03, 2002 10:30 PM Subject: Back from Sac > I have now returned safely from Sacramento. > The EVent was fine, and a fun time for all. > Afterward we had a great dinner together. > > ... > I spent another night in Voltageville last night > and headed back this morning. > > On my trip up and back, I have recorded data > (source voltage, charging amps, pack voltage in > regular time intervals). > > I hope to put this together to first POST it as text, > and perhaps later I can put in on a spread sheet. > > This was the Fastest charging times I have ever had. > Some of my charging spots had a 12kw source. So I > used both the PFC-50 and my onboard Zivan NG5. > When I had only an AVCON, I used the PFC-50. > > Charging time using both chargers: 1 hour. > Using the PFC-50 alone on a AVCON: 2 hours. > > The PFC-50 set to draw 32amp AC gave 6kw. The NG5 > gave 5kw. Source votages varied at each location. > But I usually got 11kw at the beginning of the > charge cycle. > > The AC in current to the PFC-50 stayed solid (at > 32 amps AC) until my pack reached about 160VDC, > then the PFC-50 went into a taper. > > But the NG5 curve was quite different. It tapered > far sooner than the PFC-50. As the pack voltage > rose, the NG5 throttled back, thus the the charging > kilowatts tapered sooner than the PFC-50. > > All-in-all the PFC-50 wins hands down: > -more power into the pack > -can work off the picky ics-200 AVCON (via an adaptor) > -very flexible (any current can be dialed in) > -very little waste heat or fan noise > > As you can tell, I am pleased. > > ===== > ' ____ > ~/__|o\__ > '@----- @'---(= > . http://geocities.com/brucedp/ > . EV List Editor & RE newswires > . (originator of the EV ascci art above) > ===== ----- Original Message ----- From: "Ron Freund" <rfreund@hpchs.cup.hp.com> To: <rmanzan@tscnet.com>; <joes@worldfront.com> Cc: <board@eaaev.org>; <webmaster@eaaev.org> Sent: Saturday, February 08, 2003 2:54 PM Subject: Congratulations guys! You're winners! (Not spam!) > > Dear Rich and Joe, > > Congratulations! > > The Electric Auto Association has selected you two to receive > our 2002 Keith Crock Award, for your diligent efforts and > superb work on developing the PFC-20 and PFC-50 chargers! Your > understanding of the needs of EVer's has not been overlooked. > In our opinion the effort you've expended is so significant that > we felt it deserves proper recognition. It's our way of saying > "Thank You, Rich and Joe, for a noble effort!" > > The Keith Crock Award is awarded for Technical Achievement to > those who, in the board's opinion, have made significant > contributions to the goals and ideals that we understand and support. > > We want to notify you in advance so that, if possible, you might > make last minute travel arrangements to receive the award in person > at our Annual meeting on 15 Feb. 2003. As usual, it will be held > at the Hewlett-Packard Co. Auditorium in Building 20, 3000 Hanover > Street, (off Page Mill Rd.) in Palo Alto California at 10:00 AM. > We will have dial in access to the audio portion available, > if you can not attend. 888 583-9625, ID code 303303. > > Please confirm to us, (by return e-mail) your receipt of this > announcement. > > Yours truly, > Ron Freund > EAA Chairman ----- Original Message ----- From: "Bruce EVangel Parmenter" <brucedp@yahoo.com> To: <ev@listproc.sjsu.edu> Sent: Monday, February 17, 2003 2:25 AM Subject: 120 amps with no sweat > Last week I drove South to Clare Bell's > http://geocities.com/evet_tech > to have her install the 4 gauge cable pair I had made up. This > would add an additional charging current ability. I would not > be limited by the internal wiring I previously had. > > The 4 gauge can easily handle over 100 amps, and my internal wiring > can handle 70 amps. This will give me over 170 amp charging wiring > ability. The cable has lugs to connect to the batteries in front, and > a SB-175 to mate up to the PFC-50 in the rear. > > ... > Today, I went to South to Santa Clara to bag some tech toys before I > will have to relocate (I am rebuilding/updating my son's PC). For > 14 miles I used 33 ahs (not bad). > > I was heading back and took the Page Mill exit when my emeter went > blank upon acceleration, and came back reset (all my ahs used data > were gone) at the light (when I was stopped). Now the pack read low > (128V from a 132VDC pack). This was odd. > > This could be an incomplete charge (not likely, the PFC-50 does a > nice finishing charge), I still have some tired battery cables (I > thought I changed all of them out, but maybe not), or the stiff > acceleration I had to do to keep the SUV behind me off my bumper took > its toll on the electrolyte balance (145's are electroyle starved). > > But the after a half hour of sitting while perused the tech-toys > at Frys, the pack was still low. So I stopped by Otmar's to suck up > some Solar Electrons (his PV panels make his meter run backwards). > > I pulled up next to Otmar's Porche EV, right in front of the EV > charger. As dusk approached, I noticed there wasn't any lights on in > front. This meant to me little power was being used by the house. > > I pulled out my power cords to hook up to Otmar's power. As I strung > the cords in preparation to plug them in and get a reading. The > foot, bicycle and car traffic going by Otmar's place paid no notice > to what I was doing (sometimes they do, but no today). > > As I plugged in my chargers, an older couple hobbled their way on by, > their cadence in step, but their acknowledgment of my greeting one at > a time. They quickened they pace and hurried off (I am a big guy, > some people get scared when they see me, no matter how much I smile > and gently wave). > > I plugged in my two Zivan K2's and got 10 amps each, and then my > Zivan > NG5 via the AVCON adaptor and Otmar's AVCON powerpak (add 30 amps), > then I pulled the PFC-50 into Otmar's 240VAC 50 amp 14-50. I cranked > it up to max (I now have to move quick to get readings, because the > pack charges so quickly). > > I was pumping 120 amps into my pack, and the PFC-50 wasn't even > breaking a sweat (very little heat coming out). At 120 amps into the > pack, the 132 V pack voltage was 150VDC (and rising). I was pumping > 18 kw into my pack. > > After 5 minutes, I was pushing 110 amps at 151 VDC and had already > regained 15ahs (That's 7 miles regained in five minutes). (16.6 kw) > > In ten minutes, the Zivans throttled back their charging current. I > was pushing 100 amps at 152 VDC (15.2 kw). > > One might think I would be boiling the batteries at this high a > current and pack voltage. So I popped the hood and looked at my cells > with a flash light. Barely any bubbling: one small one every second. > > At this current, I am putting in as much as I draw on the highway. I > felt the cables and connectors and they were a little warm, but I > believe that was heat left over from driving. The 4 gauge cable pair > was cool. > > This fast tapering was not because of the PFC-50. The Zivan chargers > I have in parallel taper much quicker than the PFC-50. > > I was just thrilled that I could now get this much power by having > the > outlet and the chargers in parallel. It is possible to get fast > charging! > > Foot traffic that had passed by was now coming back after buying > their > groceries at the corner store. They were still interested in what I > was doing at the curb and I was about to burst wanting to tell > someone > my glee! But, I knew better than to force my EV excitement on them > (it would not be taken the right way, nor would they understand). > > At 15 minutes, the 120 VAC Zivan K2's had turned off at 153 VDC and > the PFC-50's bright blue LED was blinking (those chargers have > tapered > back now that the voltage has reached the throttle back point). I was > now pushing 90 amps into my pack at 153 VDC (13.7 kw). > > I unplugged the the chargers that were not contributing anything to > the > charger current flow. when I charge at a high current like this it > seems as soon as I plug all my chargers in, shortly, I have to start > unplugging them. > > You know I did even have all my chargers going. If I had, I would of > had 150 amps going in. But I am not greedy. I will have to try this > again at an RV park that has three 14-50's for me to plug into. > > I unplugged and headed home. I basically did a dump charge to my pack > in 20+ minutes. I was hot-dogging North on El Camino having a good ol > time. Went I got home, my emeter said I had used up all of the Solar > Electrons I mooched with a dump charge a Otmar's. > > That was nice. That was fun. I enjoyed that! > > :-zzz > ===== > ' ____ > ~/__|o\__ > '@----- @'---(= > . http://geocities.com/brucedp/ > . EV List Editor & RE newswires > . (originator of the above ASCII art) > =====
	This page maintained by Joe Smalley Last changed on 19 February 2003