GM Multi - Solo Charger

  • Sale
  • $350.00


The GM Multi - Solo Charger is of my design and is made for the 3DR Solo Smart Drone. My goal behind building this charger was to be able to charge a full backpack worth of the Solo's batteries (holds five) at once. Additionally, I wanted to make a charger that would have an improved charge time over that of the stock chargers. I also wanted the charger to be able to break down easily and be adaptive to multiple power sources (car batteries, plug in power source, and whatever you can think of) The Yeeco DC to DC boost drivers that I use in this charger provide the adaptability I was looking for, and also benefit you as they will except 10-32v input voltage. Lastly, another big design consideration of mine was to use the correct wire gauges throughout the charger. While some people might be worried about the 12 gauge wire getting hot one should note, at most, this charger will pull around 33amps collectively. 12 gauge is rated at pulling 41amps. Does not include the multi-meter. (:


  • Charge up to 5 Solo batteries at once
  • Multiple input sources 
  • Decreased charge time (knocks about half an hour off stock charge time)
  • Internally fused Yeeco's
  • Power supply has self-resetting fuse
  • Tap into any 10-32volt DC power source (assuming the power-source can handle the current draw ~33amps)

What's in the box:-

  • x1 GM Multi - Solo Charger
  • x1 12V 40AMP Power Supply (includes A/C cable to plug into wall) 
  • x1 input power cable for a car/camper battery
  • x1 input cable from power supply to charger
  • x5 charging cables (from charger to solo battery)
  • x7 #64 rubber bands to hold lid on and for power supply

Important Notes:-

Expected demand for this product is high and it is a time-consuming product to build. It takes me about three - four hours to assemble this product (not including over 12hrs of print time) With this being said, I am going to accept all orders but please be aware it could take as long as 1-2 weeks for your product to ship (hopefully sooner) but at this time I can only give a rough estimate. If for some reason I cannot fill your order (part suppliers run out) I will cancel your order.  If you order please understand this might not be the fastest process but I will do my very best to work quickly.  


From time to time it may become necessary to adjust the GM Multi - Solo Charger's internal Yeeco Boost Driver's output voltages and current settings. While this should not be needed to be done a lot, it should be done periodically as the Yeeco's wear in and when using different (untested) power input sources. As one of the main design goals, I had when designing this charger was for it to work on a wide range of power sources (10-32v) As you move between power sources the Yeeco's output voltages/current should stay relatively constant. However, if your charger is acting up these steps can help you get back to charging.

Most Common:-

Battery charges for about 20 seconds and then stops for a few and then starts again. This is the Solo battery protecting itself from excessive current/voltage. It can be verified by looking at the light on the specific Yeeco driver. It should normally be red while charging and then turn green when the charge is finished or at idle. However, if you are having this problem it will be red for about 20 seconds and then turn green and repeat.


How to fix:-  

  • Unplug main input power to the entire charger.
  • Unplug all batteries 
  • Open charger being careful to not stress the fan wires
  • Find a small flat head screwdriver
  • Plug main input power back in
  • Grab your multimeter (if you don't have one get one)
  • Set meter to Volts DC (solid line with dashed)
  • Test the output voltage of the affected Yeeco should be ~16.8Volts (16.7-16.9)
  • Do not let the test leads touch (will create a short)
  • If that is good move onto current (*)
  • If that was not in range adjust the voltage by turning the CV screw on the blue rectangle (potentiometer) labeled CV. Clockwise increases voltage whereas counter-clockwise decreases voltage.
  • (*) Testing current (*)
  • ********Unplug input power**********
  •  Make sure you have a solo battery that is under 10% charge and set aside. Do not turn the charger on until I tell you to do so.
  • Grab your volt/amp meter and plug its terminals into their correct holes to measure amps. Then set your meter on Amps as shown in the picture, make sure it is NOT on mA/uA.
  • Grab out an alligator clip jumper wire and hook it to the positive/red side of the plug on the charger. Then connect the other end of the alligator plug to the positive/red side of your solo charging cable.
  • Next, grab your meters leads and stick one on the negative/black side of the same charging port. Then stick the other lead in the negative side of your solo charging cable.
  • Take your small flathead screwdriver and turn the affected Yeeco's  pot/blue rectangle (the one right by the part we adjusted/tested earlier) labeled CC. Unscrew it (counterclockwise) until it gets harder to keep turning (do not force it, it may take quite a few turns until it stops)
  •  Double check nothing is shorted and plug in your solo battery to the other end of our current measuring setup and then power up the charger.
  • You should see, on your meter about .130mA. Screw in (clockwise) the CC screw on the affected Yeeco slowly while monitoring the current (it is normal for the power supply fan to spin up, as you are increasing the current draw through it as well) You should start to see the current draw increase as you screw it in. Keep screwing until the current doesn't increase anymore or until you reach 5.8amps. If you didn't get to 5.8amps give the adjustment knob another half turn and call it good.



Legal Notes:-

Everlast Concepts LLC is in NO WAY responsible for the misuse of this product or damages caused by the use of this product. It is built with high quality off the shelf components that are housed and used for a specific purpose. If this product fails, catches fire, or causes other unfortunate damages (or personal injury) Everlast Concepts LLC is not responsible. Use at your own risk (by buying this product you are agreeing to and accepting the terms above). Again, use at your own risk. This does not mean the product should fail, or that it is prone to failure, it simply means Everlast Concepts LLC is not responsible for damages if it were to.