Let me warn all Nikola owners right now to stop using your Nikolas in the interest of safety.
Read on before deciding whether I should be excused for making such an arrogant statement.
My name is Darren and I wish to start off by saying thank you for all the informative details not only on the Nikola but the other EUC wheels as well.
This forum has been a constant treasure house of updates for me and my wheeling buddies in Singapore and I wish I had contributed more to it.
I weigh 102kg (220 pounds) and have been using my euc ( a collection of mainly GW & KS wheels ranging from ACM1/Tesla/MSX/Monster/Nikola, KS16S/KS18S/KS18L, Inmotion V8, Ninebot1p,/Z10, Rockwheel GT16) as a transportation tool in my daily commute between home and office. I love having the option to switch between the different wheels depending on my mood and intended destination.
My most recent addition, the 84V 1600Wh Nikola was a joy to wheel for all of the 84km total mileage it clocked before I experienced a power-cut a few days ago.
I have not had the chance to push my Nikola beyond 35km/hr (21 mph) for the entire 84km.
The Nikola was in top condition prior to the power-cut., with about 80% battery level, cruising at about 15km/hr (9.3 mph). on a straight flat cement pavement. After leaving it powered on resting against the wall of an air-conditioned cafe for 3hrs. the power-cut happened 10 minutes into my wheeling session. The gyro could not be engaged after the lightly scratched Nikola was powered on, which then emitted a continuous series of beeps with the ring of LED lights on. I had to get a friend to drive me home with the now dead Nikola.
It scared the crap out of me cos I wasn't expecting a power-cut under these low-stress parameters.
I suffered only shallow cuts on both knees and left elbow but the real pain and torture was not understanding why it happened.
I took my Nikola to my Reseller the very next day and upon taking out the control board, we discovered 3 fried Mosfets.
GW claimed that to date, there are just 6 such cases reported globally, out of 600 units shipped, excluding mine.
Upon some digging online, I found Phil's 2-parter Utube video explaining in detail what might had been the cause of Marty's and my burnt Mosfets. Thank you Phil for helping the euc community to understand what might had been the cause of the power-cut, specifically, the layer of "glue" that was found on 3 of the 12 Mosfets ( which are the ones that got fried, the other 9 Mosfets with no glue were spared)
Am I paranoid or perhaps I "over-reacted" by my plea for all Nikola owners to stop using their Nikolas immediately, until GW announces a conclusive explanation as to the specific cause of my power-cut, and a permanent fix?
Besides swapping out the smaller Mosfets for the older bigger ones, (and removing the"glue" perhaps, replaced with thermal paste maybe?), nobody knows what other improvements or revision were made to the control board being shipped out to Marty as we speak.
In view of the above, and the fact that my Nicola had a power-cut under zero or low-stress conditions (unlike Marty's case whereby his Nicola was intentionally pushed to its limits on "Over-Heat" Hill}, I will no longer trust any of the 600 units of Nikola out there now.,,, statistics be damned. It is not relevant whether any Nikola has done 100km or 10000km, stressed at 50km/hr or survived any steep climbs and still going strong.. As long as it is using the same control board with the 3 Mosfets mounted with a layer of "glue" (or due to other faulty components), this batch of Nicolas are all ticking Time-Bombs.
So is it simply a case of my Nicola having a relatively thicker layer of "glue" than all the other Nicolas out there, thereby exhibiting a lower tolerance and as such under the mildest of wheeling parameters, the Mosfets burnt out due to a short-circuit which led to the power-cut (despite surviving the first 84km crusing at much higher speeds not exceeding 35km/hr)?
Or maybe the "Glue" had nothing to do with the fried Mosfets? Maybe the smaller Mosfets are the real culprit? or Maybe its something else entirely? A lot of "Maybe"s here...I will leave the trouble-shooting to GW. Until then, my group of Nikola owners will not be deploying our Nikolas at all.
In the meantime, for the popular Distributors/Resellers out there (Example Ian/SpeedyFeek UK, Jason/E-Wheels/USA etc), don't just stop at advising your current Nikola customers to avoid stressing out their Nikolas by keeping to lower speeds.
It does not matter whether this "Glue" crap is due to "Creative Assembly" or whether GW is trying to pinch pennies here by avoiding a much more laborious and time-consuming assembly process of the Mosfets using thermal paste and Mica sheets) , the very fact that this had happened raises a question mark about whether the proper checks and tests (like King Song's Aging test on all wheels before shipping) were carried out stringently?
Again, it does not matter whether GW had documented an arduous journey to Tibet using the Nikola which survived the challenging terrain.
As long as the root cause of why the Mosfets burnt out remains unclear, it would be prudent not to use your Nicola for now.
Can anyone enlighten me as to whether the new Tesla2 (with integrated Anti-spin sensor & speakers), the MsuperX, the 100V Monster are sharing the same basic Control Board as the Nikola?
It is 6am in Singapore now and i apologize for not being able to respond to any comments until the evening.
Thank you for the opportunity to post here.