[How to] Add watthour / energy meter to your charger [Tutorial]

Hi, will try to be really brief here.

So the thing is since I started with 6s lipo chargers which had a nice display for showing all the relevant info, it was a real bummer not having any other info, besides volts, when charging with regular CC / CV charger.

The wattmeter / energy meter unit costs just 10 dollars and is relatively easy to install.

Promo pic: IMG_20180618_113642

It shows:

  • Time passed
  • Watthours (how many ‘kilometers/miles’ have u already pumped back into battery)
  • Capacity (Ah)
  • Charge Power
  • Amps / Volts
  • Temperature

Places, to buy: https://m.banggood.com/100V20A-7in1-OLED-Multifunction-Tester-Voltage-Current-Time-Temperature-Capacity-Voltmeter-Ammeter-p-1120289.html?rmmds=search

https://m.aliexpress.com/item/32799143555.html?pid=808_0000_0101&spm=a2g0n.search-amp.list.32799143555&aff_trace_key=7a01b996123546be9745a5be5de5bd7f-1528291087457-05433-UneMJZVf&aff_short_key=UneMJZVf&aff_platform=msite

(I hope, pc users can see my links)


Installation

As about wiring, since I didnt have sufficient space in my charger, I decided to wire in between my battery charge port and the charger plug.

See pictures for better description.

IMG_20180618_114455

Wiring:

IMG_20180618_111223

IMG_20180618_105559

IMG_20180618_110532

Of course, u can do the same to any other connector u are having or install meter permanently on the board.


Benefits:

With this meter I can confidently know that for 5km range I need to charge about 40minutes

As in 8minutes about 21wh is charged into battery. (21wh being average consumtion per km)

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