Plug in Supply Site now shows LiFePO4 info

What if you also use an EBH, will this provide heat if starting the day in EV mode only? Are all other functions operational (radio, wipers, nav, windows, power sterring, full brakes, etc)?

 

EBH will provide a little heat, but not much really.

when you turn heat to MAX temp,there are auxiliary electric heaters that kick on, so the gas engine would not be needed, but this will drain any battery pack pretty quickly, now whether it will pull from the hymotion pack or just run down the traction batteries first i dont know.

as far as AC that is all electric but once again, its a pretty heavy draw as well

 

I have also had the ground plug pull out of my Hymotion plug. Hopefully I can get it fixed when I take it in for an oil service. I am also not getting the stated range from the Hymotion specs - I have run out as early as 26 miles after doing a mostly highway commute (which is where the battery should last the longest due to the ICE being on most of the drive).

The large plug-in-supply kit sounds perfect for my commute as I could drive about 40% of it (28 miles total) withouth going over 52 and staying in pure-EV mode. I understand thta Hymotion does appear to be the more seasoned professional outfit at the moment.

 

yea yea, I know it's an ancient thread, but fwiw, the 10Kw-hr / LiFePO4 , pack is down in cost - $10,995. And they say it's eligible for a 10% fed credit:

Order - Plug In Solutions

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Hmm...I still see $11,995 when I went there just now--am I reading the wrong site?

Regarding the tax credit:
As previously discussed on this thread, I do not believe that the system will actually qualify for the tax credit (to my knowledge they do not have crash testing or emissions testing or FCC EMI testing). There is some discussion as to whether or not crash testing is required for the tax credit (I believe it may still be, but I may be wrong), but I do know that at the very least CARB emissions testing is required (see the other thread on this forum regarding the federal tax credit). I wouldn't buy the system expecting to get that rebate--If you do buy it I would expect to pay the full sticker price without refund.

As for the battery range...I was actually thinking about that the other day. Supposedly they only use 60% of the battery pack (76 of the 40 amp hour Thundersky cells). If you calculate out the actual energy capacity it's around 9.73 kWhr with 100% DOD. If you only figure 60% DOD you're dealing with closer to 5.2 kWhr. After you subtract energy loss due to the high internal resistance (roughly calculated out to be 0.492 Ohm for the whole pack of 76 cells--at room temperature) that means you'd see upwards of 20% additional energy loss to heat...

Call me stupid but doesn't that leave you with around 20 miles of EV range at low speeds assuming 250 watt-hours per mile (350 watt-hours per mile at higher speeds)? Where are they getting 50 miles of range? You shouldn't be able to get anywhere close to 50 miles even if you have 100% DOD. Maybe they meant 50 miles of blended mode?...

Math:
76 cells * 3.2 nominal voltage a piece * 40 ahr per cell = 9.728 kWhr pack total capacity

9.728 * .60 percent DOD = 5.836 kWhr usable range

5.836 kWhr * .20 percent energy loss due to high internal resistance = 1.167 kWhr burned up with voltage sag

5.836 - 1.167 = 4.669 kWhr "real" range

4.669 kWhr / .250 watt-hours per mile = 18.676 miles of low speed driving...

4.669 kWhr / .350 watt-hours per mile = 13.34 miles of higher speed driving...

I suppose that the percentage of energy lost due to heat fluxuates depending on how low the voltage is on the OEM pack versus the auxiliary pack, but somehow I don't think that can account for the missing 30 miles?

Anyone have any documented field range of this system? I suppose they also could be using more of the battery than 60% but again 100% utilization only ends you up around 31 miles of slow speed driving and around 20 miles of higher speed driving under ideal conditions and temperatures...

Higher DOD% usage of the battery would certainly decrease lifespan and wouldn't last the life of the car as claimed--but again I am confused by the 50 mile range number...

Confused,
Andrew

 

I have an answer, a 50 miles long..... Sales Speech!!!!

 

Whoops. My mistake ... I was talking with one of their installers at a specific location. Suffice to say, individual installers can make deals if one is ready to pull the trigger. I still have a few thousand miles of factory warranty that I don't want to mess with, if dire events happened. Or, maybe a factory PHEV will get here before we run out of patience.

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Regards y'all,

I have been driving my 10-12KWh PIS conversion for a few weeks now. Though I still do not have good gas consumption data (mostly due to longer trips and other people filling tank) I do see very encouraging data from the consumption gauge.

I am averaging >80mpg on my usual highway (hilly) commute of around 40mi roundtrip. The ICE-kill mode being used ~ 20%.

On more extended and flatter runs I can easily get >95mpg for many hundreds of miles (keeping the car charged and ICE-kill >60%).

The pure EV range since the addition of a new board is variable with terrain, but on the flat it appears that I can get the 40-50 range that is advertised (52mph max). The price after CA taxes was around 12.5K. I do believe that the tax credit is doable and will go for it. I do not think the modification will affect my warrantee, as there are law that prevent that, but I have not tested this yet.

The gents at www.3prongpower.com have been great at fine tuning and servicing thus far.

There will always be challenges and adjustments being an early adopter, but all I can say, is, so far so good....

Scott
....You can tell the scouts, they are ones with the arrows in their backs....

 

Hi Scott,

Thanks for the update.

At your leisure, could you try tracking how many miles of pure EV range you get with the odometer tripA/tripB utility off of a full charge? If not, I'll understand.

From the battery datasheets (Sky Energy (Luoyang) Co.,LTD), the PS system would have to be using well over 100% depth of discharge to get 40 miles of range (76 of the 3.2 nominal voltage cells at 40Ah a piece), let alone getting 50 miles...If you /are/ actually seeing that kind of range I would be a little worried about the lifespan of those batteries considering the relatively low cycle-life of the LiFEPO4 battery chemistry.

Assuming even 90% DOD you're looking at slightly less than 1000 cycles, according to extrapolations made from the data sheet (they only list up to 80% DOD, but it's reasonable to assume given the pattern, if anything it would probably be fewer cycles).

Andrew