Ahhhhhhhhhhh the bells and whistles an little red flashing lights all just went off!! Lol Actually planning the same system but didnt realize its capabilities!! Was going to use an ng3 for slow 120v easy access and a brusa or pc-30 or higher for 240/j1772 applications for a 160v lead acid pack! Just never occurred to me I could use both at once!!
Ain't education grand!! Lol! Stephen Sent from my iPhone On Mar 22, 2013, at 6:07 PM, Bruce EVangel Parmenter <[email protected]> wrote: Why? Flexibility, fast charging, adjusting to what space is available, a backup encase a charger fails, +more ... Others can speak of their reasons, but mine were of that point in time (the old-days when there wasn't a 6kW j1772 level-2 EVSE around every corner). Some times, I had access to two 120VAC 20A level-1 outlets, or two 208VAC 20A , or two 240VAC 30A dryer level-2 outlets. And if I did have access to a 14-50 or a 50A oven or dryer level-2 outlet, I would run both chargers off that outlet. Of my six chargers, I had a mix and match of different AC voltage input types and charger capacity abilities. These got switched around over time to match what was available out in the public. Initially, I had access plenty of level-1 outlets at a site (each on their own 20A breaker) to plug into. So, initially I had four level-1 chargers, and two ~3kW level-2 chargers. Later, as more level-2 power was available, I changed my charger configuration to a two level-1 and four level-2 charger setup (two ~3kW, and two ~6kW). I needed to do this, because when I went exploring long distances, where ever I landed, I wanted the most flexibility to get a charge. That design had paid off, again and again. Perhaps the most 'fun' I had was when I was at one of the nedra.com EVents in Las Vegas, NV and the local EAA Chapter had arranged to provide a huge genset. I had enough power available I was able to plugin all my chargers at the same time and get the fastest charging I had ever done. Sweet! ... [dream-mode-on Let's say I had a conversion that fit the big-n-tall body God gave me, that had a ~300 mile li-ion pack. I would likely want to have a similar setup as Al mentioned but with 6kW capabilities. One charger would allow me to dial in what I want (i.e.: a pfc-50, from a low level-1 up to a high level-2). The others would be isolated 6kW chargers. All chargers would be fed from multiple j1772 ports in the front of the vehicle. And I would carry on long trips extension cables to reach nearby level-2 EVSE. Lets assume a gen1 Leaf EV's pack is 100 miles (when driven by an EV driver) and it charges to 80%SOC (state-of-charge) in 8 hours using its 3kW on-board charger. If I came in to a typical public EVSE with a j1772 6kW ability, to recharge my 300 mile pack would take 3 times as long (24 hours - Sheesh, that is like recharging a Leaf EV at level-1). I could plug in to four public j1772 6kW EVSE and knock that recharge to 80%SOC time to ~3 hours. Those numbers are all guesstimates but I think you get my point: short of working out to have a level-3 charging ability on that EV, using multiple level-2 6kW on-board chargers gives charging flexibility. How would I use this other than on logn distance driving. What if I was given a work task that wanted me to drive far away, and I went I came into work I was not charged enough to leave. I would add to the one 6kW j1772 connection, three more, and zoom up to the SOC quickly. Thus letting me be quickly on my way. /dream-mode-off] If the Tesla-S' level-3 charging was CHAdeMO compatible, instead of having the 300 mile range conversion above, I could just pour that same money into a Tesla-S with a ~300 mile range pack (better resale value). {brucedp.150m.com} - On Fri, Mar 22, 2013, at 04:59 PM, Ds2inc wrote: > What's the advantage of chargers in parallel?? Faster charging?? Less > stress on the traction pack?? I understand it from a versatility position > ( I.e. 110/220/ j1772) but do get the reason for running then at the same > time?? > > Still learning!!! > Stephen - -- http://www.fastmail.fm - Access your email from home and the web _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use 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 For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
