rcgldr Posted December 30, 2022 Share Posted December 30, 2022 (edited) Looking at reported average current times ride time, versus how much time it takes to recharge back to prior SOC, the reported average current is high. For example, 4.5 amps for 10 minutes = 45 amp minutes, recharge 3 amps for 12 minutes = 36 amp minutes. Looking at battery back voltage sag versus reported peak current, at 20 amps, I see about 5.5 volt sag from EUC World (min voltage versus no load voltage), but battery test at 10 amps per cell (20 amps per pair) shows about 0.48 volts per cell pair or 9.6 volt sag on a 20S2P pack. https://lygte-info.dk/review/batteries2012/LG 18650 MJ1 3500mAh (Green) UK.html Maybe the V8F is reporting motor current as opposed to battery current? Similarly in Wrong Way's review of V8S, in acceleration test, reported peak current is 32 amps (pwm = 71%, I don't see pwm on V8F | EUC World), voltage sag 81.94 - 75.20 = 6.74 volts. Testing of 50E cells at 15 amps per cell (30 amps per pair) shows .048 volts per cell or 9.6 volt sag on a 20S2P pack. Fuse on both V8F and V8S is 30 amps. https://www.youtube.com/watch?v=t9CODg5a7BI&t=728s https://lygte-info.dk/review/batteries2012/Samsung INR21700-50E 5000mAh (Cyan) UK.html One issue is the battery test is a continuous discharge rather than a brief discharge, but that doesn't explain the average current difference. I try to keep reported peak current below about 20 amps (18 to 22) depending where I ride and SOC, and have EUC World set to notify me if peak current reaches 25 amps. Maybe that's too conservative it the reported current is high, but at least I'm riding well within the limits. Edited December 30, 2022 by rcgldr Quote Link to comment Share on other sites More sharing options...
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