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Old 03-04-2012, 06:19 AM   #125
_cy_ OP
Beastly Adventurer
 
Joined: Sep 2011
Location: Tulsa, Oklahoma
Oddometer: 5,891
Tulsa 6:47am, R80G/S sitting outside all night .. 27f degree .. resting voltage 13.79 (clip slipped off in pic) 10 seconds warmup with lights and heated grips on. then turned off for cranking tests.

choke off, first crank draws 168 amps for 4 seconds. cranks over medium speed (would have started if choke was on), . next 3 sets draws 145amp for 5 seconds. wait one minute between cranks set. engine cranking over fast. next 3 sets of cranks for 5 seconds draws 138 amps, engine cranks over fast.

watching meter for recovery over 13v before cranking. seems to be more efficient. recovery gets faster as battery warms up. after 7 sets of cranking which all would have started test mule G/S. battery is allowed to rest to measure for recovery resting voltage. This is the first chance at cold weather for weeks in Tulsa.

Shorai LFX21 AH (pb eq) was fully charged last night with Cellpro Powerlab 8. Installed before putting bike outside for the night. Very impressive performance by Shorai LFX21 AH (pb eq)!

7:25am .. battery has recovered to 13.19v after resting for 30 minutes. temp has risen outside to 32f degree. 10 second warmup with lights and heated grips... first crank draws 145amp for 5 seconds. turns over strong. wait about a minute for battery to recover over 13v before next crank .... another 3 more sets ...current draw goes down to 135amp, engine is cranking over fast.

what an impressive performance by Shorai LFX21 AH (pb eq)! note each crank cycle including first one at medium speed. All crank cycles would have started test mule R80G/S if choke was set.


27f degree 13.79v resting outside all night.. first crank 168amp for 4 seconds.


battery warms up to 30f degree, watching voltage recover over 13v in-between 5 second crank cycles



7:25am temp is now 32f degree for second set of crank tests



waiting about a minute for battery to recover to over 13v between crank cycles



Tulsa, 11:30am .. resting voltage 13.17v after recovering for about 3 hours. temp 57f degree
this means above brutal crank cycles used about 30% of Shorai LFX21 AH (pb eq) capacity.



Shorai remaining capacity chart

_cy_ screwed with this post 03-24-2012 at 06:31 PM
_cy_ is online now   Reply With Quote