#2,615 in Tools & Home Improvement
Reddit mentions of DROK AC Power Meter, AC 80-300V 100A Voltage Current Color LCD Display Panel, Digital Voltmeter Ammeter Watt Active Power Energy Battery Monitor Multimeter Volt Amp Meter with Current Transformer CT
Sentiment score: 2
Reddit mentions: 5
We found 5 Reddit mentions of DROK AC Power Meter, AC 80-300V 100A Voltage Current Color LCD Display Panel, Digital Voltmeter Ammeter Watt Active Power Energy Battery Monitor Multimeter Volt Amp Meter with Current Transformer CT. Here are the top ones.
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Parameters: DROK ac power meter voltage measuring range is AC 80-300V, current measuring range is 0-100A, active power range is 0-30000W, electric energy range is 0-9999999kWh.Color LED Display: the watt meter panel adopts clear LCD displaying accurate voltage, ampere, active power and electric quantity measuring values.Special Design: our ac voltage display designed with a switch for clear electric energy and come with a 15.5mm CT, with fast measuring speed of 2 times/s.Auto Store & Memory Function: when power off, the electric energy data will be stored and memorized, can be reset.Note: 1). The wires of voltage input terminal (green) and CT secondary input terminal (blue) cannot be connected wrongly, or the meter will be damaged. 2). The screen cannot be squeezed during installation, or there will be garbled code or break code.
Specs:
| Color | Close Transformer |
| Number of items | 1 |
| Size | 80-300V 100A |
| Weight | 0.000625 Pounds |
An additional meter isn't difficult.
They sell digital meters that can be installed in-line between the outlet (or EVSE) and meter for like $20.
https://www.amazon.com/dp/B01MRZAFAF/
I mounted this in a two gang box between my HPWC and panel and it works great.
You can put a current monitor on the electrical feed to the charging unit and it will keep track of the total electrical use by the charger. These units are typically less than $50. Here's an example on Amazon: current monitor
How about something like this: http://eyedro.com/
I put one CT on my car charger and one on my computer rack. Not sure how accurate it is, but at the very least it's helpful in tracking changes over time.
Thinking about getting another pair to put on the main legs coming into the house (Canada 240v/120v residential).
I also wired one of these up to the car charger circuit: https://www.amazon.ca/gp/product/B01MRZAFAF No networking capability, but the display is kinda neat.
Going to try this one...
https://www.amazon.com/gp/aw/d/B01MRZAFAF/ref=ya_aw_od_pi?ie=UTF8&psc=1
AC Power Meter: https://www.amazon.com/gp/product/B01MRZAFAF/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1
Or a service like teslafi that will show you your charging history, and do the math for you on cost.