There's also this guy
https://www.thegsresources.com/_foru...H-775-R-R-test, who says:
Quote:
Here are some test results comparing my old shunt SH-232 R/R to the series SH-775.
Disclaimer- I have no idea how accurate my ac current clamp meter is at frequencies above 60 Hz; I know it's accurate on 3 phase 60 Hz stuff. I suspect it might be pretty good at 120 Hz (1200 rpm), but at 400 Hz, who knows.
On the good old SH-232;
at 1200 rpm, stator line current = 6.5 amp ; R/R output 12.8 volts DC
at 4000 rpm, stator line current = 11 amp; R/R output 14.2 volts DC
On the SH-775
at 1200 rpm, stator line current = 6.7 amp; R/R output 13.0 volts DC
at 4000 rpm, stator line current = 6.8 amp; R/R output 14.2 volts DC
With the SH-775, turning off headlight, resulted in an immediate drop of stator line current to 3.5 amp at 1200 rpm.
The tests were done with a bike that had ran for good half hour first, so everything should be toasty warm. The stator used was stock suzuki- likely 30 years old.
Apparently, the SH-775 is limiting the current flow from stator to what the bike needs at the moment- and no more.
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[Edit: Note that there was discussion later in that thread that basically concluded that his clamp read about 75% of true values @ 400Hz. But the side-by-side higher-RPM comparison figures are still valid as a yardstick - as the conditions/error would be the same for both units).
The 8xx series are also series R/R. The SH847 is rated at 50A, which is supposedly overkill (not to mention hard-to-source, expensive - and physically much larger). Shindengen were a little sketchy on the specs to begin with - and have since removed them all... So I've got no clue what the SH879 or SH821 are actually rated at.
But the SH821AA is OEM Ducati fitment to last years' Hypermotards (which, if I'm not mistaken, come fitted with SkyRich LiFePO4 - lithium iron phosphate - batteries from the factory). I find it hard to believe it isn't up to the job for an old Monster...