Some interesting results from the

Mini Scanner that I installed in my 2k3 Prius.
highest amperage to the MG2 was a half throttle start 47.5 amps
highest voltage on a coast 306 volts to the battery
it's neat to see MG1 reverse direction when the ICE starts
BSOC is running about 57-64%
I'll get more temp information on the Block heater as I now have an engine temp gauge
Max MG1 RPM 6230
Max ICE RPM 3780
all this data if from a very limited test, IE. max 13 blocks driving.

 

today the following results.
Max regen 57.3 amps (approx 64 kmh and moderate braking, not friction)
highest voltage 312 volts, after a long hill and lots of regen.
interesting as you go thru about 46 kmh the MG2 current requirements drop down to about 9 amps on level ground and just maintaining speed.
more to come. I've got it programed to give MG2 torque and temp and current draw, and battery voltage.

 

I'd love to see Graham Davies do this for the 2k4 as I'll buy one for it too. Just to compare the data.

 

I know all about his efforts to do it for the 2k4 and when he's got it, I'll get it. You really don't want to know how much this one cost me landed here in Canada. 193 usd and exchange took that to 265.78 + 4$ processing fee and $43.87 tax on this end, so you can see it's no bargin, but as a mechanic you just have to know this kind of data if there's some way to extract it. That'll give me a year to justify it to the "banker".

 

some more results from a longer test drive. Up a mountain. Start at 300' and go to 3,200' in 4.5 miles. Temp at bottom 27C temp at top 20C
BSOC at bottom 55.5%
BSOC at top 57%
Voltage at bottom 290 volts
Voltage at the top 307 volts
Engine temp at bottom 87C
Engine temp at top 100C
MG2 temp at bottom 58C
MG2 temp at top 68C
MG1 temp at bottom 60C
MG1 temp at top 79C
Coming down the hill produced the most interesting results on the regen side
Started at the top with BSOC 57%
and on the way down at about 1/3 the distance the BSOC hit 80%, until then I was up to about 54 amps regen and had the Voltage as hi as 340 volts. When the BSOC hit 80% I could no longer regen more than about 2 amps and the Voltage dropped to 322 in "D" mode so dropped it into "B" and the amperage went to -18 amps and the voltage dropped slowly to 309 volts. At 80% there was no way to make regen braking work, when you eased on the brakes you were immeadiatly into friction braking.

 

this is on a 2k3 so the a/c is a standard clutch as a typical car so I'd say probably about 6 amps. And 12 volts at that. Well they are a smaller clutch so the draw might be a bit higher to get the clamping pressure required to turn the compressor.

 

the system has changed a lot, 200 volt battery verses a 273 volt. MG1 puts out up to 500 volts and the inverter uses the higher voltage to power MG2 and the inverter drops it to probably 260 max to charge the battery. This is how they get the extra power for the 2k4 and is one of the reasons I feel the 2k4 has less battery motive power at low speed compared to the 2k3. Until you can get the scanner for the 2k4 this is all speculative. Also the MG1 and 2 speeds are higher on the 2k4. MG2 not a lot but MG1 about 25% higher.