# 2014 Gem **URL:** \ **Category:** Uncategorized\ **Created:** [December 22, 2018, 7:24pm UTC](https://community.electricforum.com/t/2014-gem/15128 "2018-12-22T19:24:28Z")\ **Posts on this page:** 20\ **Page:** 10
**Author:** ![chris1](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chris1/32/3300_2.png) [@chris1](https://community.electricforum.com/u/chris1)\ **Post date:** [February 10, 2019, 7:05pm UTC](https://community.electricforum.com/t/2014-gem/15128/183 "2019-02-10T19:05:45Z")
Hey buddy, Im sure that Im missing something here. Im buttoning things up on my car and put it on to charge and I cant get the chargery charger to put out amps. Any settings that I should look at? It was charging just fine the other day. ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/4/46f5d48f05e4c2f854e43d4c5454e890932139ac.png) Cell count 28 Charge Current 10a End Current 10% End Voltage 3.5v Restart Charge Yes Auto Charge Yes ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/0/01aa62b1acd53f43fef1338afbe2905fda469e04.jpeg) ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/d/d3accf51db64fdc4d5e73186d5d379d412e873b7.jpeg) ---
**Author:** ![chris1](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chris1/32/3300_2.png) [@chris1](https://community.electricforum.com/u/chris1)\ **Post date:** [February 10, 2019, 7:37pm UTC](https://community.electricforum.com/t/2014-gem/15128/184 "2019-02-10T19:37:05Z")
I’m an ■■■■■, I I forgot to push and hold life, sorry to waste your time. ---
**Author:** ![chris1](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chris1/32/3300_2.png) [@chris1](https://community.electricforum.com/u/chris1)\ **Post date:** [February 13, 2019, 6:39pm UTC](https://community.electricforum.com/t/2014-gem/15128/185 "2019-02-13T18:39:35Z")
Hey Dave, quick question. Could I use the chargery charger as a power supply through the BMS to charge 29 cells? It’s says it goes to 102v. I think I can use an extra cell with your spoof. ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [February 13, 2019, 7:41pm UTC](https://community.electricforum.com/t/2014-gem/15128/186 "2019-02-13T19:41:36Z")
Yes, you can. I believe it only does 28s lifepo4, but you can set it to 28s and a higher voltage per cell. I do the same charging 4s. It only goes down to 5s, but it can be worked around. 90+ volts is on the edge of overheating the main contactor coil. It’s a good Idea to connect a series resistor to limit current. ---
**Author:** ![chris1](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chris1/32/3300_2.png) [@chris1](https://community.electricforum.com/u/chris1)\ **Post date:** [February 13, 2019, 7:58pm UTC](https://community.electricforum.com/t/2014-gem/15128/187 "2019-02-13T19:58:43Z")
I have a few spare contractors so I think I’m going to try it! Could you send me a link for a series resistor if you would be so kind. ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [February 13, 2019, 8:13pm UTC](https://community.electricforum.com/t/2014-gem/15128/188 "2019-02-13T20:13:45Z")
I did the math for someone once before. Have to search for it. Measure the coil resistance for me and I’ll make a guess. Thinking 10% to 20% of the coil resistance. Guessing at wattage if 20% voltage drop = 20v . E\*2/R= 400/R It will dump a lot of heat, but better than in the coil. ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [February 13, 2019, 8:21pm UTC](https://community.electricforum.com/t/2014-gem/15128/189 "2019-02-13T20:21:19Z")
[![](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/45/1067_2.png)](https://community.electricforum.com/u/Inwo) [Inwo](https://community.electricforum.com/u/Inwo) [May '18](https://community.electricforum.com/t/2002-gem-contactor-getting-very-warm/13728/6) This is a Generic coil. (280 ohms?) FEATURES for your SW200 Style Single Pole Single Throw (SPST) 400A 80VDC 250VAC 12V, 24V, 48V, 60V, 72V, 96V or 120V DC Coil EV Contactor Set o 400A Contact Switching o SPST-NO Contact o Maximum Coil Energy Waste: 18W o 1.5A Power Draw > [@2002 GEM Contactor Getting Very Warm](https://community.electricforum.com/t/2002-gem-contactor-getting-very-warm/13728/8): > > That coil need 60 ohms and dissipates 3.75 watts. 5 watts in a cool area or mounted to al. I suggest a 30-60 ohm 10w to start. Then measure volts at coil. Let me see what I have. Have these 50 ohm 10w if you can’t find locally.[MVC-002F] ---
**Author:** ![chris1](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chris1/32/3300_2.png) [@chris1](https://community.electricforum.com/u/chris1)\ **Post date:** [February 13, 2019, 10:52pm UTC](https://community.electricforum.com/t/2014-gem/15128/190 "2019-02-13T22:52:05Z")
Temporarily hooked up the last cell. Disconnected the bms and I’m reading 96.5v. Got code 77. Going to turn on my headlights and radio for a while to see if I can get to 96v. I wish I didn’t convert everything to LED, thisnis gunna take a while. ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [February 13, 2019, 11:14pm UTC](https://community.electricforum.com/t/2014-gem/15128/191 "2019-02-13T23:14:11Z")
Shouldn’t take long after charging to drop. Drops a lot even with no load. If you want to push your luck add a diode in series with spoof. Each diode adds .6v or so. Band toward controller. ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [February 13, 2019, 11:30pm UTC](https://community.electricforum.com/t/2014-gem/15128/192 "2019-02-13T23:30:30Z")
Did you ever clean this up to go public? The 28s/29s question is interesting. ---
**Author:** ![chris1](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chris1/32/3300_2.png) [@chris1](https://community.electricforum.com/u/chris1)\ **Post date:** [February 13, 2019, 11:53pm UTC](https://community.electricforum.com/t/2014-gem/15128/193 "2019-02-13T23:53:39Z")
Ok got it to 96.1v, and HOLY MONKEY…it pulls like an animal! Got 38mph on gps. I rode it for about 1.5 miles and it was a savage. I’ll clean this up either tonight or tomorrow. ---
**Author:** ![chris1](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chris1/32/3300_2.png) [@chris1](https://community.electricforum.com/u/chris1)\ **Post date:** [February 14, 2019, 2:02am UTC](https://community.electricforum.com/t/2014-gem/15128/194 "2019-02-14T02:02:56Z")
This is the contactor I have, I think its a 100amp at 72v/80v ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/7/73555d618424f2cbecee2f28ead012289501ab14.jpeg) Couldnt I just bite the bullet and get a higher amp/volt contactor like this… ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/9/947226a4b0dcb7d6a36ef3b7b820542450174eef.png) ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [February 14, 2019, 2:34am UTC](https://community.electricforum.com/t/2014-gem/15128/195 "2019-02-14T02:34:45Z")
I cant guarentee an economizer will work. A resistor is a simple fix. I only need the coil current or resistance to make a good guess. ---
**Author:** ![chris1](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chris1/32/3300_2.png) [@chris1](https://community.electricforum.com/u/chris1)\ **Post date:** [February 14, 2019, 3:03am UTC](https://community.electricforum.com/t/2014-gem/15128/196 "2019-02-14T03:03:38Z")
Ill measure it up tomorrow. I cleaned up the post so go ahead and make it public! ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [February 14, 2019, 4:22am UTC](https://community.electricforum.com/t/2014-gem/15128/197 "2019-02-14T04:22:24Z")
Made this topic public on February 14, 2019, 4:22am UTC ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [February 14, 2019, 2:34pm UTC](https://community.electricforum.com/t/2014-gem/15128/198 "2019-02-14T14:34:54Z")
![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/2/23eacdc4a7ccea774d4558d18a459dcde12cd2b8.png) 133 ohms? 48watts? Wow, that’s pretty substantial. At 100v need 166 ohm total for .6a to flow’ Add about 33 ohms. I^2 R=12 watts Guessing 30 ohm 25 watt will be a good start. ---
**Author:** ![chris1](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chris1/32/3300_2.png) [@chris1](https://community.electricforum.com/u/chris1)\ **Post date:** [February 14, 2019, 3:32pm UTC](https://community.electricforum.com/t/2014-gem/15128/199 "2019-02-14T15:32:44Z")
Something like this? Can you help me understand how this would be wired? [https://www.mouser.com/ProductDetail/ARCOL-Ohmite/HS25-30R-F?qs=sGAEpiMZZMtlubZbdhIBIEidPY%2bx%2FLaaFfS5yRUJiqc%3D](https://www.mouser.com/ProductDetail/ARCOL-Ohmite/HS25-30R-F?qs=sGAEpiMZZMtlubZbdhIBIEidPY%252bx%2fLaaFfS5yRUJiqc%3d) ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [February 14, 2019, 4:22pm UTC](https://community.electricforum.com/t/2014-gem/15128/200 "2019-02-14T16:22:22Z")
Yes, connect in series with the coil. I have 25ohm and 50 ohm. If you will test voltage at coil using each, I’ll send them to you. PayPal me a dollar as payment so I can print a label. If the don’t work, you will know what to buy. Dave ---
**Author:** ![chris1](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chris1/32/3300_2.png) [@chris1](https://community.electricforum.com/u/chris1)\ **Post date:** [February 14, 2019, 4:39pm UTC](https://community.electricforum.com/t/2014-gem/15128/201 "2019-02-14T16:39:31Z")
Should the resistor be before or after the fuse? Paypal on its way. ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [February 14, 2019, 4:47pm UTC](https://community.electricforum.com/t/2014-gem/15128/202 "2019-02-14T16:47:04Z")
Doesn’t matter. I would put it on the + side of coil and mount it to aluminum frame or contactor bracket. [Previous page](https://community.electricforum.com/t/2014-gem/15128.md?page=9) [Next page](https://community.electricforum.com/t/2014-gem/15128.md?page=11)