Steve,
thanks for your reply. Let me clarify something:
I believe the rule of thumb is 1 electric HP compares to about 4 ICE
HP. I think the '20' in the E20 is meant to compare the E20
to a 20 HP
ICE tractor - it is not a 20HP electric motor.
I think I read somewhere that the E20 is a 3-4kw motor which is the power
it can sustain for a longer time. The ICE's are rated at peak power, that
is where the difference comes from. I thus wanted to see what the peak
power of the E20 motor is and, due to the current limiting, that is limited
to the 11 - 14 HP. My question is if this number now is comparable to ICE
HP.
Do you have a reference for this rule of thumb you mention. I would love to
learn how that comes to be.
I'm surpised at your current readings. My ammeter (150A max
hall effect
probe) usually runs around 30-40 A in flat mowing (traction
motor and
mower motors combined). I've never seen it run over 60 A or so total.
Hmm, that is unsettling. I just bought this meter and while it is probably
not
the most accurate meter (meant for automotive testing of alternator and
starter
current draw) I was hoping the readings would be in the right ballpark.
Well, I'll measure again tonight with the mower motors running on a flat
stretch of the yard and with the meter mounted better, so that I don't have
to bend over and look into the battery compartment while driving in D2!!!
:)
Course I haven't taken it to it's limit. I'll have to check it.
Yes, it would be interesting to compare. I'll look at the following:
- driving on level stretch, Speed 4 and Speed 8 in L, D, D2 (while in
motion)
- mowing on level stretch, Speed 4 and Speed 8 in L, D, D2 (while in
motion)
- start in L, D, D2 on level stretch with full power
Markus