Range Chart

Rav4 EV Range Charts

100% Capacity (brand new - no degradation)

https://www.dropbox.com/s/u1mybenqwoajun8/Rav4rangeChartV100.2.pdf?dl=0

90% Capacity (10% degradation)

https://www.dropbox.com/s/3bcv212xxsfd2vr/Rav4rangeChartV90.2.pdf?dl=0

80% Capacity (20% degradation)

https://www.dropbox.com/s/ddfjojy6d29q8zf/Rav4rangeChartV80.2.pdf?dl=0

70% Capacity (30% degradation)

https://www.dropbox.com/s/20y8b9xhdyps3ht/Rav4rangeChartV70.2.pdf?dl=0





When new:
41.8kWh usable- 100% SOC
35.0kWh usable- 83.0% SOC
1.0kWh unusable- 2.2% SOC





Here's what 50% looks like WHEN NEW, with 10 of 16 fuel bar segments illuminated (at 70% capacity / 30% degradation, it will be in the middle at 8 or 16 fuel bar segments). Disregard what the GOM says:






Miles Gained per Hour Charging @ 87.5% charger efficiency
70F Ambient temperature - hotter or colder will decrease miles gained
Amps/Volts -- Where ---- City Drive ----- 65mph
--------------------- 2.7 miles/kWh - 3.4 miles/kWh

12 / 120 ------- Any ------ 2.8 miles ------ 3.5 miles (stock cable supplied with car)
16 / 120 ------- Any ------ 3.8 miles ------ 4.7 miles (JESLA with NEMA 5-20)
12 / 240 ------ Home ----- 6.8 miles ------ 8.6 miles (EVSEupgrade.com mod to stock cable)
16 / 208 ------ Public ----- 7.5 miles ------ 9.5 miles (2013+ LEAF EVSEupgrade)
16 / 240 ------ Home ----- 8.9 miles ----- 11.2 miles (2013+ LEAF EVSEupgrade)
20 / 208 ------ Public ----- 9.4 miles ----- 11.9 miles (2013+ LEAF EVSEupgrade)
20 / 240 ------ Home ---- 11.0 miles ----- 13.9 miles (Clipper Creek LCS-25)
24 / 240 ------ Home ---- 13.6 miles ----- 17.7 miles (JESLA w/NEMA 14-30 or 10-30)
30 / 208 ------ Public ---- 14.8 miles ----- 18.7 miles (typical public J1772)
30 / 240 ------ Home ---- 17.1 miles ----- 21.6 miles (rare public J1772)
40 / 208 ------ Public ---- 18.5 miles ----- 23.4 miles (Tesla Roadster/Clipper Creek)
40 / 240 ------ Home ---- 22.7 miles ----- 28.5 miles (JESLA w/NEMA 14-50 or 6-50)

EXCELLENT!!! Do you have plans to make this into an iPhone app? How about a credit card size or handy pocket reference guide?

THANKS TONY!!! :mrgreen:

Dsinned said:

EXCELLENT!!! Do you have plans to make this into an iPhone app? How about a credit card size or handy pocket reference guide?

THANKS TONY!!! :mrgreen:

Click to expand...

Check out the "LEAF Energy" app for iPhone and iPad.

The chart will have degradation pages in 5% increments. Yes, you'll be able to print it and take it with you.

I have the leaf energy app. When will the rav4 chart be available on it? Very cool thank you

HD172 said:

I have the leaf energy app. When will the rav4 chart be available on it? Very cool thank you

Click to expand...

Well, I probably have a few months of gathering data before that point. But yes, I believe there will be a Rav4 version.

I love the concept. I was thinking today that it would be nice to have a consistent way of recording usage, to help with this kind of chart, and better understanding your car's behavior.

I don't have a special meter or way of measuring the amount of kWh used when charging my car each night, but there are a number of data points that can be easily captured when starting the day after an overnight charge:

• Type of charge (Std., Ext.)
• Odometer reading
• Estimated range

Additionally, I'm thinking that recording the SOC level from the "fuel gauge" before charging would be useful.

With these data points, and especially with the odometer reading between charges, we can start to see the trends in our usage.

I'm thinking that a small notepad might be the "app" I use for that, but if anyone's got any suggestions for an iOS app that could be useful for recording this data, I'm open.

Also, are there other data points that can/should be captured?

-Chris

There is a new app coming from GM for Chevy Volt and possibly useable by other EVs called "ECO Hub". I think this can be used to record energy consumption and battery charging data. It is my understanding that if you have a Smart Meter at home during EV charging, it can figure out how much energy comes from the grid to charge your EV. Stay tuned . . . :mrgreen:

Dsinned said:

There is a new app coming from GM for Chevy Volt and possibly useable by other EVs called "ECO Hub". I think this can be used to record energy consumption and battery charging data. It is my understanding that if you have a Smart Meter at home during EV charging, it can figure out how much energy comes from the grid to charge your EV. Stay tuned . . . :mrgreen:

Click to expand...

Fortunately, we don't need GM's help for any of this. Several current EVSEs will report the kWh. Some folks use a "TED", and you can also use the actual utility meter on the EVSE (my house has a separate utility meter just for the EV).

Joyride said:

I love the concept. I was thinking today that it would be nice to have a consistent way of recording usage, to help with this kind of chart, and better understanding your car's behavior.

I don't have a special meter or way of measuring the amount of kWh used when charging my car each night, but there are a number of data points that can be easily captured when starting the day after an overnight charge:

• Type of charge (Std., Ext.)
• Odometer reading
• Estimated range

Click to expand...

Estimated range won't provide ANY useful information for this endeavor. Sorry. Since these meters (GuessOmeter - GOM) rely on your previous drive to make a current estimate, there's nothing we can do with it.

The good news is that we can assume that all cars are at 100% battery capacity. Odometer readings are definitely needed, and some landmark event:

100% "extended" range charge
80% "normal" charge
Low Battery Warning (LBW)
Very Low Battery (VLB)
Climate Control Limited (CCL)
Turtle (Low Battery Charge - LBC)

Start with trip odometer and economy meter reset.

To get a baseline, the car needs to be operated over a level road at a steady speed. Cruise control on. Temperature as close to 70F as possible (this mitigates TMS power useage) and Climate Control OFF.

Record trip odometer miles and economy. If you have the capability, record the kWh to refill the car.

Simple.

We will need the route to verify it met the "level" part of the equation, and date/time to check weather data. Please, no GOM data.

Alternate plan:

If you can't find a place for steady speed, we can still use miles traveled and miles/kWh, provided there's little regen used, and temps are still near 70F.

TonyWilliams said:

Fortunately, we don't need GM's help for any of this. Several current EVSEs will report the kWh. Some folks use a "TED", and you can also use the actual utility meter on the EVSE (my house has a separate utility meter just for the EV).

Click to expand...

Excuse my ignorance, what is a "TED"?

For my VW conversion I found some useful Amphour meters but none translated to miles like my RAV does. One displays on my Android and used the GPS to give me Amphrs per mile. I have to do the inverse calculation to compare it with the Miles per KWhrs that I get from my RAV instruments. When I charge either car at a Chargepoint EVSE I get KWhrs used. I don't think I have that from my EV Link but I do have a couple of split coil amp sensors and an interface to a home automation controller that I guess I could clamp on to the legs that feed my EVSE to get amps used for charging at home.

Ampster said:

Excuse my ignorance, what is a "TED"?

For my VW conversion I found some useful Amphour meters but none translated to miles like my RAV does. One displays on my Android and used the GPS to give me Amphrs per mile. I have to do the inverse calculation to compare it with the Miles per KWhrs that I get from my RAV instruments. When I charge either car at a Chargepoint EVSE I get KWhrs used. I don't think I have that from my EV Link but I do have a couple of split coil amp sensors and an interface to a home automation controller that I guess I could clamp on to the legs that feed my EVSE to get amps used for charging at home.

Click to expand...

TED stands for The Energy Detective. It is a home energy monitoring system that measures the amperage entering your mains breaker box. This is probably a single phase, 240Vac, 100A (or 200A) service connection provided by your electric company. TED uses current clamp sensors around each leg of that high current wiring connection that transmit a signal to a remote monitoring device that attaches to a PC in your home to readout realtime power consumption.

I use a similar monitoring product that does essentially the same thing as TED, called the EnviR Home Energy Monitor, made by a company in the UK. I am in the process of converting it to a totally wireless solution with the ability to measure "whole house" consumption AND the dedicated 240V circuit to my Leviton battery charger installed in my garage. I can "monitor" the later even via the whole house sensor as well, but have to subtract any other household loads consuming power at the same time I'm charging my EV(s). This is relatively easy because late at night, early morning is when I usually recharge, when almost nothing else is using electricity, and what little other power might be drawn, is insignificant compared to a 7.7kW EV charging station.

For more information about the EnviR Home Energy Monitoring product line, go here:

http://www.currentcost.net/buynowmain.html

This might be an option:

http://www.ebay.com/itm/181030112898

Ampster said:

TonyWilliams said:

Fortunately, we don't need GM's help for any of this. Several current EVSEs will report the kWh. Some folks use a "TED", and you can also use the actual utility meter on the EVSE (my house has a separate utility meter just for the EV).

Click to expand...

Excuse my ignorance, what is a "TED"?

Click to expand...

http://www.theenergydetective.com/

For my VW conversion I found some useful Amphour meters but none translated to miles like my RAV does. One displays on my Android and used the GPS to give me Amphrs per mile.

Click to expand...

You don't need any of these calculations. Just the miles driven, miles per kWh from the Nav screen, and if you can get it, the kWh from the EVSE to "fill it up".

It will be extremely important to know exactly what EVSE, voltage and amps used. That way, we can adjust for charger efficiency (generally lower at the slowest charge rates).

When I charge either car at a Chargepoint EVSE I get KWhrs used. I don't think I have that from my EV Link but I do have a couple of split coil amp sensors and an interface to a home automation controller that I guess I could clamp on to the legs that feed my EVSE to get amps used for charging at home.

Click to expand...

Yes, the Blinks and ChargePoint will give you that data online.

TonyWilliams said:

Ampster said:

Excuse my ignorance, what is a "TED"?

Click to expand...

http://www.theenergydetective.com/

Click to expand...

Thanks, It has a similar data collection device as my home automation device, but a standalone data reporting. Looks like lots of good data for a price.

Draft 2:

Numerous changes, but of significance is that the EPA estimates now align with 2.7 miles/kWh:

41.8kWh (41.8 * 2.7 =113 miles) = Extended Range charge = 100%

34.0kWh (34.0 * 2.7 = 92 miles) = Normal charge = about 81%

After pumping over 50kWh into the Rav4, I now believe it's possible to have 41.8kWh useable !!!

Tony, Draft 2, is starting to look much more accurate based on my (albeit) limited experience with my RAV4 EV. And I am quick to add that the "GoM" seems much more accurate as a range "predictor". To wit, my last standard charge indicated 109 miles, and my last extended charge 136 miles on the GoM. My cummulative "average" driving efficiencies for both charges were 3.1 and 3.2miles/kWh respectively. Interprolating between columns, this is almost dead on with your latest Range Chart.

As a suggestion for the next draft, I would "shade" the last couple left hand columns to reflect these results are only possible under extremely favorable driving conditions, not generally practical under most driving situations. Such results are only possible by sacrificing personal passenger comfort and driving far slower than permissable in favor of achieving absolute maximum range by using extreme "hypermiling" driving techniques. Although theoretcially possible, ranges in the "shaded" area of this chart, are not to be expected from typical drivers and operating conditions of the RAV4 EV.

Btw, there is a misleading note beneath the chart, regarding "usable" battery capacity, which should be corrected to agree with the left hand vertical scale, which now peaks at "41.8kWh".

Please keep up the good work! :mrgreen:

I dont understand the range chart of RAV4 EV. could you please explain it?

It's a handy reference chart that basically be used as a "lookup table" to determine your RAV4's approximate driving range based on a constant speed (less accurate) in MPH, or your driving efficiency (more accurate) in "average" miles/kWH. A constant MPH does not factor in elevation changes and traffic conditions, nor battery temperature; all of which affects miles driven per kWh of battery capacity used. While driving AVERAGE efficiency will continuously vary as well depending on the same conditions. So, neither of these can precisely predict driving range, nor are all RAV4 batteries characteristically the same even under identical environmental conditions.

There are many different variable that go into the predicted results, so it is important to realize the miles given in the chart are merely "estimations", and of course, as always, YMMV.

The chart also tells you other things like "useable" battery capacity on a normalized scale, to achieve any given driving range after a full charge, whether in standard charging mode or extended, and how many corresponding segments on the GoM relate to each estimated range value on the chart.

A practical use of the chart is most easily derived from you AVERAGE driving efficiency as reported by the car itself. Find the closest miles/kWH value across the top of the chart, and where that column intersects with the number of segments on your GoM, is the estimated number of miles you can drive your RAV4 EV to the point of absolute lowest level of allowable battery depletion, called the "turtle mode".

You may have to interpolate for your actual average driving efficiency, e.g. "3.2 mi/kWh is between 3.3 and 3.0, so at your maximum battery capacity after a standard charge (34kWh), the interpolated value for the resulting driving range, would be ~109 miles. The same result can be calculated by multiplying 3.2mi/kWh * 34kWh, which equals ~109 miles.

Essentially, the chart does this multiplication for you to compute the resulting miles you can drive your RAV4 EV ,"IF" your average remains fairly constant, which may be easier to maintain at a constant driving speed.

The RAV4 EV's maximum battery capacity "by design" (greater than what Toyota calls, "usable" capacity) is assumed to be 50kWh. 41.8kWh is generally accepted as the USABLE capacity after an extended charge, and 35kWh after a standard charge, so the chart takes into account driving range based on which full charging mode is used.

CAVEAT: You cannot nearly as accurately use this chart to predict driving range after only doing a "PARTIAL" charge!

sam said:

I dont understand the range chart of RAV4 EV. could you please explain it?

Click to expand...

Well, it is a tool to help estimate how far you might drive your Rav4 EV. If you are driving a certain speed (in mph) or economy (in miles/kWh) on level terrain.

Depending on how many fuel bar segments are illuminated (of 16 total), you can get a baseline for how far you can drive.

So, let's say that I've been driving around all day, and I get a call to quickly go someplace 75 miles away. Can I make it? If you only rely on the estimated range on the dash, you have no idea exactly parameters went into making that estimate.

But, with the chart, you could quickly determine at what speed or economy would be needed to drive that 75 miles without recharging and with the existing energy in the battery.

So, let's try the 75 mile example with the Version 1, Draft 2 document. If the car had a "normal charge" (Full on the gauge, with all 16 fuel bar segments illuminated), then I could drive 80mph (the current chart shows 82 miles). Naturally, you always want to leave yourself some reserve energy beyond the 75 miles you actually wanted to drive, and 82 miles does that.

But, let's say that the car only shows 1/2 (half) full on indicator. Follow along the chart to find a range over 75 miles, and that 45 mph or 50 mph (85 and 77 miles range respectively). I don't recommend driving on freeways at those speeds, but assuming that you have a level road, you would get there.

Let's say I'm driving along, and I wasn't paying attention to my energy level, and the Low Battery Warning comes on with only two fuel bar segments remaining and the Navigation says I have 20 miles until I get home. Can I make it home?????

Let me know if you can answer that question. If not, I'll keep trying to explain it.

Dsinned said:

CAVEAT: You cannot nearly as accurately use this charge to predict driving range after only doing a "PARTIAL" charge!

Click to expand...

Hopefully, those individual fuel bar segments won't be too far off from linear !! The Nissan LEAF is about as goofy as any energy display can be, and we manage!

Fortunately, many of us read the data directly off the CAN bus in the LEAF and display % of remain useable capacity (we call it a Gidmeter). It makes the job very easy.