01-18-2022, 04:08 PM
(01-18-2022, 03:41 PM)danbrotherston Wrote:(01-18-2022, 03:03 PM)tomh009 Wrote: How much power do snowblower batteries put out? A short search showed that an electric lawnmower might use something like 800W under load.
800W would be very low for a snowblower (just over 1 HP). See below for information on wattage of battery units.
(01-18-2022, 02:26 PM)Bytor Wrote: 1,800W to be precise. Or 1,875W if your mains, like mine, test out at 125V. ;-)
Actually, the NEC and I believe our Canadian code matches it, limits the maximum continuous wattage of equipment on a 15A circuit to only 80% of the breakers capacity, so 1440W is the typical figure I hear.
But yeah, about 2 HP, rather anemic even from a low end gas blower.
Where as a high end battery unit could have 2 * 60 volt batteries * 7.5 amp hours * 5C discharge rate could easily draw up to 4500 Watts... or almost 6 HP which would be typical for a small engine in a snow blower. That being said, I couldn't find any figures on actual wattage for these units, so I have no idea how much of that capacity they are using.
Yes, 6 hp would translate to about 4500 W. But none of the units I saw show the rating of the motors so I really don't know how much current they draw. Somebody quoted about 20 minutes of runtime from a pair of Ryobi 40 V 6 Ah batteries (using a $1700 snowblower). If that's the case, it ran at roughly 18A x 40 V x 2 = 1440 W ... looks much like what you'd get from a standard house outlet ...
(Of course you can run 20A or 30A equipment from your house panel, too, but you'll need to have the wiring to match.)