A horsepower is a horsepower, whether the "horse" eats gasoline, diesel, or electricity. But due to the nature of the application, I suggest looking for a motor with a continuous power rating similar to what the original engine can produce at moderate speed; electric motors often have a rating for a peak power which can only be sustained for a short time before they overheat, and a lower "continuous" rating that they can work at indefinitely. If you're really lucky there will be a proper short-term "S2" rating which would be applicable.
In the linked article, the Avant Tecno machines with the tiny motors look like quick-and-dirty conversions that I wouldn't want to copy, but the Kovaco skid loader, JCB telehandler, and Schaffer wheel loader look like well-designed machines... and with 30 kW to 40 kW (peak) they're not very different in power from a diesel-powered machines of similar size. Those better machines all use separate motors for the driveline and the working hydraulics.
The Kovaco skid loader uses the driveline motor to drive a hydrostatic system, which is unnecessary complication and inefficiency (compared to just one electric motor per side), but it's apparently easier for the company to convert their existing design than to build a proper electric skid loader.
The Cat 246B has a Cat 3044C DIT engine, which is really a Mitsubishi S4S-DT. While it can produce 78 hp at peak, it is rated by Mitsubishi at 55 kW (74 hp) at 2500 RPM, and runs most efficiently at much lower speed and 40 to 47 hp... 30 to 35 kW.
In the linked article, the Avant Tecno machines with the tiny motors look like quick-and-dirty conversions that I wouldn't want to copy, but the Kovaco skid loader, JCB telehandler, and Schaffer wheel loader look like well-designed machines... and with 30 kW to 40 kW (peak) they're not very different in power from a diesel-powered machines of similar size. Those better machines all use separate motors for the driveline and the working hydraulics.
The Kovaco skid loader uses the driveline motor to drive a hydrostatic system, which is unnecessary complication and inefficiency (compared to just one electric motor per side), but it's apparently easier for the company to convert their existing design than to build a proper electric skid loader.
The Cat 246B has a Cat 3044C DIT engine, which is really a Mitsubishi S4S-DT. While it can produce 78 hp at peak, it is rated by Mitsubishi at 55 kW (74 hp) at 2500 RPM, and runs most efficiently at much lower speed and 40 to 47 hp... 30 to 35 kW.