>>2893164
>direct drive it from a solar panel (no battery)
You should just fork out like $1000-$1500 for a half-decent offgrid system and then you can do normal things the normal way. But in this case, yes, it is viable to hook the motor directly to the solar panel.
>>2893174
More or less. Definitely go for a 24-36V rated motor since the token cheapo solar panels nowadays are the 400-450W ones and they are usually operating around 30-40V.
Once again, cordless drills are the cheapest stuff you can get that outputs high torque. That motor says it does 25Nm, which it probably can do, but for example, a basic cordless 18V Makita drill has 60Nm peak torque, a fancier one has 120Nm. But such drills are very much sensitive to voltage, you can't connect them to a 40V solar panel.
Also consider ebike retrofit motors, they are usually fairly high torque, high power motors that don't cost terribly much. You might have to use pulleys on the last stage since very high torque gearboxes are usually very expensive. HTD 8M or something like that.

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I am absolutely fixated on making a direct wind powered wood chipper. I don't care if it is slow. The idea is to buy a mini industrial…

I am absolutely fixated on making a direct wind powered wood chipper.
I don't care if it is slow. The idea is to buy a mini industrial…