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When I check my battery charge with the Hondalink app it is always at 99% when fully charged (240V charger, overnight charge) Is that everyone's experience?

Tim
 

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When I check my battery charge with the Hondalink app it is always at 99% when fully charged (240V charger, overnight charge) Is that everyone's experience?

Tim
No, not my experience at all. When it's charged it will say 100 % unless you have it start for pre climate conditioning.
 

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Discussion Starter · #3 ·
No, not my experience at all. When it's charged it will say 100 % unless you have it start for pre climate conditioning.
Thanks. No, the 99% is without climate pre conditioning engaged. I'll mention it to the service tech Friday when I take the car in.

Tim
 

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When I check my battery charge with the Hondalink app it is always at 99% when fully charged (240V charger, overnight charge) Is that everyone's experience?

Tim
It has been my experience that sometimes a full charge is 99% and sometimes 100%. Lately, with it colder now, 99% is more common. I'm not concerned.
 

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99% Charging

Since installing my Juice Box Level II charger, I'm experiencing the same thing. My car is only charging to 99% although it has been cold (California cold) outside. Level I charge had always been 100%. Checked with the dealer and they have no idea. I'll call Juice Box and see what they say and report back. Glad I'm not alone.
 

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Discussion Starter · #8 ·
Holly since my post I have reached 100% charge on one occasion. I'm leaning toward the weather as the reason for the 99% charge.

Tim
 

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Now that's it's warmer here in MI it seems like when I charge up my 2018 Honda Clarity it's showing 100% which is good but it shows that I only have 43 mile range. I kind of recall once it started getting warmer it would show 100% charge and I would have 47 - 50 mile range and this was last week.

It's showing 100% but only 43 mile range! I have a Juicebox Pro 32 and it's inside of my garage and I don't think the issue is with the charger. I even used my 110 charger cable that came with the car and it doesn't give me the range I think I should get.

Any suggestions? Or maybe I should take it back to the dealership? Also, the temp last night was 40 and I did show 100% but only 43 mile range.
 

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Now that's it's warmer here in MI it seems like when I charge up my 2018 Honda Clarity it's showing 100% which is good but it shows that I only have 43 mile range. I kind of recall once it started getting warmer it would show 100% charge and I would have 47 - 50 mile range and this was last week.

It's showing 100% but only 43 mile range! I have a Juicebox Pro 32 and it's inside of my garage and I don't think the issue is with the charger. I even used my 110 charger cable that came with the car and it doesn't give me the range I think I should get.

Any suggestions? Or maybe I should take it back to the dealership? Also, the temp last night was 40 and I did show 100% but only 43 mile range.
The range estimate is based on recent driving history, and many factors other that ambient temperature can reduce this. Highway driving, fast starts/stops, etc will reduce efficiency - physics is physics. Driving conditions/behavior that would reduce mpg when running on gas will reduce mi/kWh and therefore range. The fuel powering your vehicle makes no difference.

43 is actually fairly close to the EPA range rating of 47. The 47 mile rating is derived in laboratory conditions and is a mix of low speed freeway and urban driving at 70 degrees.

Probably more info than most want, but the EPA application witht he test results can be found here:
https://iaspub.epa.gov/otaqpub/display_file.jsp?docid=40312&flag=1

A few key numbers:
Honda elected to use the 2-cycle test format (and the standard 70% adjustment) to derive the range ratings.

Charge depleting UDDS (Urban or City rating)
Recharge event energy (@ 240 V and includes charging losses): 14.601 kWh
Charge Depleting Range (Actual miles): 72.265​

Charge depleting Highway
Recharge event energy (@ 240 V and includes charging losses): 14.485 kWh
Charge Depleting Range (Actual miles): 61.422​

More info on the range tests:
https://greentransportation.info/ev-charging/range-confidence/chap5-ev-range/epa-estimates.html
 

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I think the 99% is only an estimate, so sometimes it says 100% charge is a full charge and sometimes is 99%. Does anyone know if I can set the charge to stop at 80%? My engine sometimes starts up when the battery is fully charged and when I apply the brakes or engage the regen pedal it triggers the engines to start. I understand that this is suppose to be normal as the energy that the regen has generated has nowhere to go so the engine comes on for some reason. The problem is that I live on a hill and when I fully charged the batter I had to go downhill and that starts the engine, very annoying and pollutes the environment.
Any tips would be greatly appreciated. Thank you in advance.
 

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I think the 99% is only an estimate, so sometimes it says 100% charge is a full charge and sometimes is 99%. Does anyone know if I can set the charge to stop at 80%? My engine sometimes starts up when the battery is fully charged and when I apply the brakes or engage the regen pedal it triggers the engines to start. I understand that this is suppose to be normal as the energy that the regen has generated has nowhere to go so the engine comes on for some reason. The problem is that I live on a hill and when I fully charged the batter I had to go downhill and that starts the engine, very annoying and pollutes the environment.
Any tips would be greatly appreciated. Thank you in advance.
Maybe you have tried this already but if you can start the hill descent slowly and keep the speed very low you can usually keep the engine from coming on. Regen doesn't operate below about 5 mph and as long as you keep at a slow speed you can press the brakes as hard as you want and it will only use the friction brakes. This is something you can observe on the power display and with some practice you can see how slow you need to go to avoid regen. Of course only when you can do this safely i.e. no cars behind you.

As for charging to 80% the only way to do this is by using scheduled charging. Keep track of a couple of charging sessions to determine the typical SOC% per hour. It will vary depending on conditions but it doesn't have to be that exact. When you have that number you can figure out how many hours it will take to charge to 80%. For me using level 1 it's around 7.5% per hour, so if I am at say 35% then it's 80-35=45, divided by 7.5 = 6 hours.
 

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Thanks 2002 for the tip. The street is fairly steep and there are usually lots of cars on this road so it will be hard for me to go slow as it may cause irritation behind me, but I will definitely give it a try. I suppose on the Hondalink app there is no programming for the charge to stop at 80%? Have an awesome day.
 

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Thanks 2002 for the tip. The street is fairly steep and there are usually lots of cars on this road so it will be hard for me to go slow as it may cause irritation behind me, but I will definitely give it a try. I suppose on the Hondalink app there is no programming for the charge to stop at 80%? Have an awesome day.
My hill is fairly steep with a speed bump at the bottom, but it's a short hill so as long as no one is behind me, which is most of the time, I can go as slow as I want. I tried it yesterday and had no problem going 10 mph with no regen. I might be able to go a little faster than that. The only time I have a problem is when I forget that I have a full charge and then head down the hill at 20 mph which is the speed limit then hit the brakes when I get near the speed bump. A few minutes later I notice that ICE is running and I suddenly remember that I was supposed to take it slower that day.

Correct, nothing on the app to set charging to 80%. It's either charge to full, or a specified ending time. Some details about charging times:

- If you use the fob to start charging it always charges to full and ignores any ending time that you have scheduled. The previously set ending time will remain in the schedule but it won't take effect until the schedule runs again the next day.

- If you have no schedule set and plug in, it immediately starts charging and charges to full. A lot of people do it this way which is of course the easiest, but if you aren't driving a lot, the car will spend a lot of time sitting at 100%. That certainly won't kill the battery, but it may lead to some range degradation over time. However this is still speculative as Clarity has only been on the road for just under three years and only a few people have experienced 10-15% or so degradation, but I don't know their charging habits, so it could be something else that caused their degradation. Some have said the degradation seems to flatten out after the initial drop, but again it will take a few more years to get enough cumulative experience to know what the long term affects are. Since I am already doing scheduled charging because of my time of use rate plan, it's easy for me to set it for 80-85% when I don't expect to do much driving the next day. If I know (or suspect) that I will need the full range the next day then I charge to 100%. In that case I try and schedule it to reach 100% within 30 minute of my expected departure time. Prius Prime will do that automatically if you set an ETA for departure, that's another feature lacking in the Clarity.

- If you have a schedule set, it does not immediately start charging when you plug in but it will wait for the start time to begin charging.

- If you plug in after the scheduled start time it will not start charging, so you have to either start charging with the fob (which will charge until full) or else modify the start time on the schedule to start five minutes from now (you can only schedule in five-minute increments).

- When a charging is currently running you can modify the schedule in the app to whatever you want and it will not affect the current charging session, in that case you are basically setting tomorrow's schedule.
 

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In case you use a EVSE such as JuiceBox Pro, you can set a maximum charge amount. I usually set it at 20% (adding 20% to the car, the battery will be at 60% level) because that's how much I need one-way, but sometimes I would change it to dispense 30%-40%, all on the phone app. There are some quirks about the app, but this is the only EVSE that I know of which you can quickly control the total charge limit.
You can even change the charge rate, where I have it mostly at 16A, but when I'm in a hurry I change it to 32A.

The wifi really sucks on the Juicbox by the way. In case you lose wifi, the EVSE will start charging even though you set a limit until the car rejects it reaching 100%.
Because my schedule is pretty fixed, I usually keep my battery between 35% and 65%.

I wish the Clarity had some way to limit the max charge levels.
 
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