Looks great! What did you put on again?
Regarding speed, I’d say from my first experience about twice as long?
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I agree with @Micke probably about twice as long, if not longer depending on if going from 20% to 100%. In my case, it wasn’t going back out. If it was, it probably would have taken 3-4 hours (I think) to hit 80% from around 20%. Never saw it get above 49C.
The top is coated with InfernoWare Reflect (www.InfernoWare.net)
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It works, but it took 7 hours to go from.20-80% today in.the shaded doghouse witb 93F.ambient temps. It seems to reduce charging power at 45C. Do you know if it throttles on a curve? I need try with fan blowing on it tomorrow. My fear is that if it doesn’t drop to 45C, it won’t increase charge power. If that’s the case even a fan won’t help. I could onky keep it at 48-49C with the doghouse and fan.
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It does. 45 is the first throttle AFAIK. Then another, then stops and cools and resumes at 45.
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So does this mean now we have to wait even longer before he charges and goes back to work. One way it seems good to throttle. But, if it takes longer to charge. More hours are burning up before he goes to work. I don’t know that’s a better fix. Just thinking out loud.
That’s kinda what I was getting at. I’m still testing at this point.
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Yes, but certainly you could opt to send it back out after it tops off a good bit. Just running tends to cool it off a bit. I realize it’s not optimal, but at least it’s still charging AND if it stops, it will cool and auto resume. Maybe that could be an option, charge until throttled at X% and then resume work.
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How did you get that? No link to buy it and I found nowhere on Internet to buy it?
You can purchase from the product page… InfernoWare™ Reflect - InfernoWare™ LLC
4 oz will do the trick, you’ll just need a spray gun or airbrush.
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I did some digging on this, and it does solve some heating issues. Just wondering what it would do with the GPS? They said it works with Total Reflectivity of 85%. That was based at Coverage Based on 1 Mil Thickness. We have enough problems with GPS. Please post your findings. Maybe before and after. Cover on temps, and Signal. Cover off temps and signal. Don’t even move it. Just make sure GPS is strong, and Ready to Work. Thanks for any info.
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This was I used to do. When at full power charging, it would hit 50C at 60-70% in an hour or so. At that point I would send it back out.
Yesterday when it returned at 20% at noon, the battery was already at 45C so it was throttled at the start of charging. It hovered around 49C at the peak and never stopped charging. The downside is that it didn’t get to 80% until 7PM.
I’m not sure what the best solution is yet, just sharing initial data. I have the fan on it today today, so I’ll see how that impacts things.
Add: Just checked the weather and it’s headed to 94F today - should be some good data.
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Does this mean 6 acres is now reduced to 3 or 4? I didn’t do the maths, but longer charge times means less mow time.
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Or just charge early morning and late evenings as well as middle of the night.
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Hi second day with the fix and I am pleased. Another hot day here (30-32) with sun. It does charge under the sun. I found that when you realize it slows charging because the heat is getting out of hand, just send it back mowing. It happens consistently (at least for the last 3 rounds) at around 60%. So Charge from 20 to 60 then mow (which on my case cools down the battery) then charge. I get much more covered than before in that heat. Waiting to 80% seems impractical as the charging trickles after that point. What is other’s experience?
I think this is a fair fix from @Yarbo-Forum. Good job. Continue fixing things, you can do it! 
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Depends what is your timeframe for 6 acres… I do 3 acres in 2 days. Medium speed. 10cm overlap. Lots of trees (more than 140) and no go zones and channels. Only 20ish dead ends. And two pauses for rain. This despite the throttling. But I also mow at night.
So I probably could do 6 in 4 days? If your grass doesn’t grow to fast it would be fine. Since I mow quite short (4cm, tight setting) I prefer to mow daily or every other day…
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Dew causes the grass to stick to the mower that usually ends in one of the cutting motors whining about being blocked. It’s grass buildup on the top of the cutting disks.
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Oh sure.. always with the excuses! 
If you’re mowing in dew and wet grass, a hose in the morning will take care of that. Definitely don’t want to wait for it to dry, a lot harder to clean. I try not to cut too late for those reasons too, but sometimes you just got to.
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The fan experiment didn’t get all the info I wanted due to a tripped breaker in the morning (entirely my fault - too much stuff on circuit), but it does look promising.
With the late start, I only cut a small area before it returned to the doghouse shaded dock. Ambient temperature was 95F. SOC was 65%, which is already on the downslope of the normal charge curve for this battery chemistry. But, it was still a huge improvement over what I saw the previous day without the fan and the battery never went above 44C!
The battery cover was in place the the entire time. I did reposition the fan compared to previous — moved directly behind the unit rather than angled to the back/side. I’m thinking this minor change may have helped remove more of the induction heat across the bottom of the frame - just a guess. Still, 65% to 100% in 1:10 with 95F ambient is pretty satisfactory!
3:06 - Charging Started
SOC: 65%
Battery: 43C
3:43 -
SOC 80%
Battery: 44C
4:16 -
SOC:100%
Battery: 44C
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That is pretty darn satisfactory.
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