BUT, at least you KNOW it is properly aligned now! 
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When does it start charging again? I’m at 49c and it still fails to charge.
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48c seems to allow it to start charging.
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Still charging with a temp of 53.
Stills shows temp of 53 but stopped charging. Made it to 62%. Sent Yarbo back to work.
i would not recommend for the longevity of the batteries. I’ve flown heavy drones in adverse wind but damaged batteries doing so in the hot conditions even as i was mindful to let cool before recharge.
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oh man. so how does it handle having the battery door open during a charge?
Wouldn’t Yarbo’s BMS protect the battery? @Yarbo-Forum?
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Was around 97 or 98F here today. I mowed late morning and then late afternoon into the evening. The battery got to 45C in the black tarp doghouse mid-day. I got the mower out for the late afternoon at around 94 degrees out when the sun started ducking behind trees, and the battery went down to about 41 while out there mowing in the shade.
I wouldn’t have the riding mower or push mower out in these temperatures in the direct sun, so not having the Yarbo out there was no big deal. The difference was the Yarbo actually did some mowing – on the nasty days I wouldn’t bother and just wait for cooler weather.
Tomorrow is supposed to hit triple digits here. Yowch. Yarbo may find itself in my garage on the wall charger after a morning mow.
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Out of curiosity I did some quick research through some other mowers owners manuals.
Here are the charging temperature ranges for the Luba from the manual.
For the Luba 2:
For the Terramow:
As you can see, it’s a battery chemistry limitation and not a design issue. A brief Google search about the Luba 2 and temperature and lots of people complaining about failure to charge due to overheating.
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Yeah definitely agree that temperature limits are needed to protect the Battery and the Yarbo itself.
Though I do believe there should be some active cooling methods on the unit.
I have a large yard, so only 2/5 schedules that I have can finish in 1 battery charge.
so the other 3 schedules(days) the unit has to return home and charge before it can finish.
Unfortunately with weather ( only been in the high 80’s and low 90’s ) the unit fails to charge for ~8 to 10 hours. It returned back to charge around noon. and then went out to finish the job around 10pm ( still had ~3 hours remaining on the job ) I ultimately canceled the job around midnight as it already mowed most everything I cared about ( just perimeter left ).
Note I did check battery temps while it was running. When it hit ~22% battery ( been out mowing from 100% ), battery temp was 42.
As we go into summer. Day temperatures are only going to get hotter, and I suspect the unit will not charge until night again.
While I will continue investigating “cooling solutions”.
- Currently I plan on building a small pvc structure holding shade cloth to try and give the charger a place out of the sun.
- I have also questioned the idea of a solar fan installed in the core of the yarbo ( 2023 model ) as it looks like there is space for one.. I dont think slot for the battery would allow enough airflow around the battery to actually provide any cooling. Though a peltier cooler would.. be interesting..
I question if there might be a “slow charge” profile that could be created, where instead of disconnecting from the charge entirely, reduce charging current to prevent ( reduce likelyhood ) of over heating while charging.
EG if over 45 ish, reduce charging current to 1/2 or so.
While yes this will take longer to charge than say full power..
If the battery overheats and you have to stop charging for.. 10 hours… I would much rather slow charge for 6 or 8 hours.
The App itself also needs to be updated to better display this overheating issue while charging as well. EG show a differnt icon saying “paused - Overheating” or something other than just… not charging.