Great review video. With all the testing you did it answered all of my questions about the device . Going to buy one for my workbenche. Thanks !

@robojax

4 жыл бұрын

you are welcome. I am pleased you found my tutorial useful.

Thank you very much for this instructive video and more importantly, thank you for uploading this video with Spanish subtitles. Muchas gracias por este video tan instructivo y más importante aún, gracias por subir el video con subtitulos en español.

@robojax

3 жыл бұрын

de nada. Me alegro de que el video y los subtítulos sean útiles. por favor comparte y suscríbete. gracias.

Thank you Jack for this great video

@robojax

5 жыл бұрын

You are welcome.

Great job again....thanks Robojax!

@robojax

5 жыл бұрын

You are welcome.

Very informative video. Well done.

@robojax

4 жыл бұрын

You are welcome.

I bought one of these in 2019 for our caravan in a 12V system. As you have found out it is not easy to wire up the shunt. After I installed it, and was running a 2000w inverter to run a 800W toaster, I found the unit was getting very hot. Not wanting this to catch fire, I bought a Victron BMV712. Very expensive, but did not get hot in the same service. A few years later I need a current meter for our house battery/inverter 48V setup, so I thought I'd try this one again. First, I removed the shunt from the circuit board, and mounted it separately. Ran a twisted pair of wires to the unit. It worked perfectly, no heating up, and measures the voltage & current of the 5000w inverter. It can't monitor the battery SOC because it is only in the inverter cable, and there is another charger in the system. For the money it is a good device, but can only be seen on site, in the garage, and can't be connected to a PC or phone.

I'm very lucky to see this video from you. This is a product produced by our company in 16 years. At present, we have released the new KG140F. We would like to send you another one. I hope you can help us test it.

@robojax

2 жыл бұрын

Hello, I am already in contact with you and waiting for you. renze

This was a perfect review for me. You answered every question as i was thinking them. Thank you. Great job.

@robojax

4 жыл бұрын

You are welcome. I am pleased hearing this.

Am glad I came across this video because I have been trying to figure out how to correctly wire this battery monitor. Please I would request to know how you wired up the relay. Thanks a lot

@robojax

5 жыл бұрын

You are welcome.

Thanks for the fantastic video. Most of my questions were answered. However, would really like to see a schematic showing exactly where the shunt goes in a negative earth system. My battery has two leads on the neg terminal - one goes to chassis earth and the other to neg distribution point.

@robojax

4 жыл бұрын

You are welcome. Other than this pdf there is nothing else available supereyes.ru/img/instructions/VAT%20Quick%20Guide%202018-3-17.pdf

Thanks

@robojax

5 жыл бұрын

you are welcome.

I sure wish you could of reviewed how to wire up for battery charging. Great video non the less.

@robojax

3 жыл бұрын

Thanks.

فديو مفيد شكرا"

@robojax

4 жыл бұрын

عفوا

would it work for 300 volts AC high frequency ? and high amps 50 amps AC high frequency ? thanks

hello to canada, do you think it's possible to test it if the relay switches back on automaticlly when the values come back out of the limit range, and post me/us an answer here on YT. that would be great, thanks from germany

Hi Robojax! Thanks for the video. We have one of these but have somehow disconnected the wireless connection and don't know how to reconnect. Can you help?

@robojax

3 жыл бұрын

Hi, I have mention the address. you have to select the right address. check it. other than that contact the them on this page www.aliexpress.com/item/32866409420.html

Awesome video, just received mine and wondering if you could help me with powering the meter. And also wiring an 80amp 12 volt relay. The relay has 4 terminals and I noticed you just connected 2 terminals with a diode. In my case I would be using this unit to be powered with 12 volt battery. So would I connect the unit to negative and positive off battery? And on my relay how would I wire it up? If you can show me a wiring diagram I would be forever grateful. Have a nice day.

@robojax

4 жыл бұрын

Hi, I just watched the video making sure I have explained the wiring. Indeed I have explained how to connect it. The wiring diagram comes with module but if you watch video you don't need the diagram. But if you want to look at the instruction manual which has the diagram, here it is img.banggood.com/file/products/20180510042547VAT-Quick-Guide.pdf

Thank you for your review :) Do you know if the battery state of charge etc is calculated and stored in the base unit (shunt unit)? Reason: I want to turn the remote display on and off in my vehicle but leave the base unit on with my battery and solar to log state of charge while I'm away. Happy new year! and thank you for your vids :)

@martink9785

4 жыл бұрын

I think I just answered my own question by watching a video on an older unit, I assume this one is the same. The guy disconnected the remote screen by changing channel, when he reconnected, the watt hour jumped up significantly. So it seems everything is done in the base unit and the display is just a display and UI.

@robojax

4 жыл бұрын

You are welcome. Yes. True.

@MEDIASTIK

4 жыл бұрын

Yes is still keeping the memory

Do you know whether it is (slightly) overload resistant? I plan to buy a 1050 for my boat because the resolution is better then from the bigger devices and most time my devices pull around 1 Amp or much less. But for a short time the starter current for my 10HP outboard engine will run through the shunt (should be around around 80 Amps for max. 5 seconds). Do you have an idea if it will blow up immediately? I do not expect the device to count the energy during this moment, only the shunt to withstand the current. Did you touch the shunt during max load? Does it become very hot?

@robojax

4 жыл бұрын

are you referring to the 10HP will blow your 80A or your device draws 80A and you want to know if this meter can handle it?

Hi, Looking at buying one of these for my solar system that is 48v. So when fully charged 57.6v. Says 0-100v but never seen any one use it above 30. Also says 0-30v input. So do you have to power the unit off less than 30v but the main leads across the shunt can be up to 100v ? Would love to see a setup and test to the rated 100v.

@robojax

4 жыл бұрын

Hi, it is because unless it is EV industry no one uses anything about 30V. My lab power supply is 30V and 60A.

Can I use the same 12v battery source that the shunt is connected thru for the external 12 - 30 volt power supply in order to run in wireless mode ?

@robojax

4 жыл бұрын

I will reply to all subscriber's 🔔 questions. So make sure to subscribe.😊

great demo - thanx go out to ontario!!! so i can setup a V or A limits and the relay switches at that point, does the relay also switch BACK (on or off) automaticly when its not within this limit, or do i have to do it every time by hand? would be great to get a short answer. greetings from germany

@robojax

5 жыл бұрын

Good question. I tested at 8:55 but forgot to show or test to see what happens if current goes down. I am not sure what happens. Sorry.

@ilmkreis6993

5 жыл бұрын

good morning to canada, do you think its possible to test it, and write it in the comments, you can but you dont need to make an extra video, would be good to know this, cos when its doesnt, i dont have to bye it for my setup... thanx for the answer so far, cheers a lot for your vids from germany

@englishrupe01

5 жыл бұрын

@@ilmkreis6993 No reply means i think you may be pushing your luck here asking him to do stuff. There does come a point where you just have to get one and figure it out for yourself. After all, $30 or so isn't going to kill the piggy bank. Try it, and then let us know your results.

Thanks. Very helpful. I am a little confused about the connections as I have limited knowledge here. I am trying to connect to a 12v DC battery for an RV to monitor voltage, current and battery remaining capacity. On the battery positive terminal, there is the positive cable and I believe the charging cable connected together. On the negative battery terminal, there is just the negative ground connected. When you say connect to the load, does that simply mean connect each device terminal to its corresponding lug on the battery, in this case, and also connect a power wire from the small connector to the positive on battery terminal? If not correct, please advise. Also, as the shunt is located in the battery box, what advise can you share about protecting the device from rain, etc. Thanks if you can help.

@robojax

4 жыл бұрын

You are welcome. I believe I have left nothing unexplained. I don't the this item setup right now to know what is connected where. Perhaps you skipped the video. Please watch it without skipping . I spend I believe over 10 hours to prepare this. that's why I said I have explained it very well.

I have wired in the Juntek VAT 1100. I have gone for the 2nd wiring diagram where you provide DC in 10-30V underneath VIN. It is displaying by battery voltage correctly but the current and wattage seems to be .1 out. My roof fan should be drawing 4amps at full speed and it's reading 0.4 on the meter. It's also reading 3.7w which is obviously way too low and should be more like 40w. Can you help? I wonder if it have it on the wrong setting but can't figure it out as the booklet is useless!

@robojax

4 жыл бұрын

Unless you connected incorrectly, the other issue would be the defective module which I doubt.

@AndyG820

4 жыл бұрын

@@robojax thanks. how might it have been wired incorrectly do you think to cause a difference of reading?

I'm just wondering , Is it really a wireless ? Why the usb chord still in tack? Do this display monitor has a built-in battery?

@robojax

3 жыл бұрын

you asked a question before watching the video or skipped. it is wireless.

My receiver cannot connect to the main sensor. I tried changing address but the icon on the top left remains showing no connection. Any idea what is wrong? Even when i plug via the usb cable the receiver powers up but only gives null values, despite the main sensor being connected to a 60v, 150a supply.

@robojax

Жыл бұрын

Contact the manufacturer. They hat store on AliExpress. Contact them. Simply search for the product and you will see juntek store.

What is the max amperage/wattage the shunt board can handle if you are using a external relais to switch off the system

@robojax

4 жыл бұрын

I believe I have left nothing out. Perhaps you skipped the video. Please watch again to get the answer.

Thanks for this video. My juntek vat4300 measurement module stopped reading voltage and current. Kindly help on what to do. The display module is functional. I tried doing a reset using the USB connection but still did not displayed voltage and current. Before the failure to read voltage and current occured, I noticed intermittent disconnection (on wireless mode) between the measurement module and the display module

@robojax

3 жыл бұрын

Hello, I did my best to test and show everything. you can contact the manufacturer via AliExpress juntek.aliexpress.com/store/3672134 you will see contact on this page or select a product and then contact them. you need AliExpress account to contact seller.

Very good video. I have one of these installed in my camper and very happy but is it possible to set the time or is it just a timer. I found that if I pull the bolts while tightening they can be tightened without a wrench of the other side.

@robojax

4 жыл бұрын

thanks for the comments. when we talk about 100A, it has be tightened using a wrench or there will be spark and fire. Be careful.

@donmuir517

4 жыл бұрын

@@robojax Actually use a wrench on the top nut and find that the bolt doesn't rotate, therefore can get a secure connection.

@robojax

3 жыл бұрын

you mean just hold it with hand and rotate the top nut?

@donmuir517

3 жыл бұрын

@@robojax Yes, once the nut starts to tighten you can just hold the unit and with a wrench tighten the nut. The unit should have the bolts secured but for the price it is still a good buy. Would also like it if it read the time as I don't see the purpose of having the timer. Thanks again for the video - well done!

is there a lora version of this . hoping to buy that.

@robojax

4 жыл бұрын

I am not sure is there. What for you need it?

Hi. Tq for making this vdeo.. At 7:33, Q1: is it ok to install cable from the positive battery to V-in? This can power up the modul too.. Q2: since the Grn and Vext is 10-30v,. Can we use cable from a 24v batteries to this port too?

@robojax

3 жыл бұрын

yes it both cases. you can power the module with the same voltage that you are measuring the current. and it will work with 10 to 30V

@raphaelu3649

3 жыл бұрын

@@robojax thank you 👍👍

Wonder how one would wire in a 200Amp relay with this unit to protect expensive solar batteries from low voltage over discharge.?

@robojax

5 жыл бұрын

It has been explained and demonstrated. i have also provided the user manual. Link in the description.

Nice presentation. I purchased Vat1300 model. It was working though I observed that it could not detect current below 0.6A. As an example if I have a load of 0.5A (at 12V), or if I reduce my load to 0.5A, the current & watts will display/drop to 0 and there will be no movement in Ah and Wh also. Is this the same also with Vat4300? Thanks.

@robojax

4 жыл бұрын

this uses shunt resistor. not hall sensor. shunt resistor has 0.5% to 1% error. not a good idea to use it for 0.5A. You should not measure any value lower than 10A .

@nps2838

4 жыл бұрын

@@robojax Thanks for your reply. I don't get it why it is not a good idea to measure 0.5A below. 1% error is less evident the lesser the current measured.

How do you configure the wireless connection? My receiver is wireless and showing a red X meaning disconnected. I know how to change the channels, but how do I know what channel it's supposed to be on? Pls help!

@robojax

Жыл бұрын

Just select the same channel

@jeepy8067

Жыл бұрын

@@robojax I know how to change the channel on the receiver unit, but how do you do this on the black transmitter unit? how do you check what channel it's set to?

How did you change the wireless address to A04? I have been unable to change the address through the ADR function.

@robojax

5 жыл бұрын

The link for pdf manual is in the description. See page page 10 and it in red color.

@FredBehning

5 жыл бұрын

@@robojax Thanks

Thanks Robojax. Probably the best video tutorial about Juntek device... Is anyone can help to purchase the right relay for it? I believe relay must be matching the battery's voltage or not? My battery 55V..

@robojax

3 жыл бұрын

I've created a resources page for this video. The link is in the description. here for you robojax.com/L/?id=309

@serginhovault007

3 жыл бұрын

@@robojax I did follow chapters of your video and especially this one "08:55 Relay and Over/Under Voltage/Current protection". In the video, you are saying that using for demo 20A relay... Where to buy this kind of relay or how they call or if they are available like for 50 or 100A. It looks like all Juntek device sellers including official Juntek seller/manufacturer hide that information presuming that all Juntek device buyers now very clear everything about what kind relay need to purchase...

Do you lose your settings when the display loses 12v power?

@robojax

3 жыл бұрын

yes it will hold it.

Can power the module with the same voltage that you are measuring the current in 3W mode with relay ? ( VIN - VEXT )

@robojax

2 жыл бұрын

Your questions seems that have not watched the video. I don’t remember anything about this but I am sure I have explained all villages. So please watch without skipping

@sv1hab

2 жыл бұрын

@@robojax There is a similar answer but it does not specify which one mode is { 2w or 3w ) the answer is (yes it both cases. you can power the module with the same voltage that you are measuring the current. and it will work with 10 to 30V ) kzread.info/dash/bejne/k2iWwaNpiqfcp8Y.html&lc=Ugzsd1yMiQrDlG-_GSB4AaABAg.9I9Ou1C0tao9IIyZVQ_AjB

you need relay to cut de voltage when you set LVP? About 200A relay??

@robojax

5 жыл бұрын

Yes if you wan to disconnect it.

@portodososcantos2983

5 жыл бұрын

@@robojax thankyou a lot, My Juntek has 200A i need to buy a normaly close 200a relay right? you know about de voltage? i need to know to look for a relay, my system works with 24v the Juntek will send 24v to the relay ? or 5v ??

Hi, I had same problem connecting the wiring lugs because terminal bolts were not captive.

@robojax

5 жыл бұрын

Open it and insert the wires as I have shown.

Yeah that is a sad design, someone was not thinking, and the cover for the shunt isn't the best either! But if it works well I could overlook the rest, maybe solder in a pin connector on the shunt board.

Good review

@robojax

5 жыл бұрын

Thank you

USB Host on the "Sensor" unit is used for what? Logging or sensors?

@robojax

4 жыл бұрын

Please watch the video. I have shown what it is.

@adrianevans8304

4 жыл бұрын

question what is the purpose of the temperature sensor? just another feature? maybe if used for 'charging' to reference the battery temperature.

Would you think this would be reliable enough for car batteries?

@robojax

5 жыл бұрын

Depends on how much current your car draws when starting. Some cars take move than 400A. It should be fine if you connect it properly and securely.

Does it have memory function?I have installed it in an EV,and whenever I turn it off and and turn it on again,it does not remember any previous data and shows 100% charged even if it was discharged 50% before switching it off.

@robojax

4 жыл бұрын

that is the issue. I have not tested it. I am sorry I have not been involved with battery and actual application so I missed that.

@SimbavMr

4 жыл бұрын

@@robojax Hi, Thanks for the video. Can you check that issue exist? Thanks.

@sayontanseth1994

4 жыл бұрын

@@robojax Hope you do that one day

@martink9785

4 жыл бұрын

Hi, did you disconnect the display only or shunt unit? I'm interested to know if everything is remembered when only disconnecting the display. Cheers :)

😍😍😍

hay .. can you set ocp to 0.01a? or how to set up ocp small limits for this tool?

@robojax

4 жыл бұрын

Hi, No it can't . This is made for max. 300A and with 1% accuracy you will get minimum of 3A. If you want 0.01 A then get a module that can measure maximum of 1A or even 500mA (0.5A) .

@zain7976

4 жыл бұрын

I plan to measure at low voltage and low amperage with a range of x.x1A, which type do you think is suitable VAT-110 or VAT-1030? I used DC 36V 5A as a Power Source and regulated it with a buck converter with the lowest voltage of 1.2V. i want ocp all work even at the lowest voltage

@robojax

4 жыл бұрын

sorry I missed your comment. Yes get very low current meter. Here are my videos about current: kzread.infosearch?query=current

Does it read current in charge and discharge?

@robojax

5 жыл бұрын

yes it does.

Hello. Can someone tell me if it is possible to monitor smarphone battery with this device? I have Xiaomi Mi 9T 4000mAh. Thanks

@robojax

4 жыл бұрын

this is for current of 300Ah or 300,000mAh if you want to use, it this can't control charge, just how much energy is used. Yes you can if you wanted. but there are better solutions a very small and clean solutions for your applications.

I need more Wireless Communication distance then 10M. Any help?

@robojax

3 жыл бұрын

pick different device.

you can used that meter also both 12v or 24v sir?thnks..

@robojax

4 жыл бұрын

I have explained it the wiring and voltage at 6:39 please watch it.

"one important issue, deez nutz" XD. great vid, thank you.

@robojax

3 жыл бұрын

Glad you enjoyed!

I just cut the blackbox slightly so the cover goes on and off easily when cables connected. Yes poor design but kmon, we are in DIY already, just make some slight mods ;)

@robojax

5 жыл бұрын

yes but otherwise it is shown very accurate values.

@Gabriel.Leni100

4 жыл бұрын

@@robojax not realy... I have installed this in my Camper van. With 550w Solar and 12v 200ah lifepo4 battery. When i set the size of the battery and leave it for a few days, it will go up to 100% and will never ggo back down again. But i know from experience that my usage is about 1kwh each day. Even if i set the battery to 0% charge on the meter. After 4 days it will show 100%. Which means its something like 25% off each day with measuring...

Is it possible to use it as a low temperature cut-off protection?

@robojax

3 жыл бұрын

sorry I did not understand. if you want this module to take action based on temperature, then this is not the module. this will turn OFF at certain current value. not temperature. you may have to look at thermostat videos here kzread.infosearch?query=thermostat

@Skupik1

3 жыл бұрын

Robojax Low temperature protection for LiFePO4, so it switches off the relay below zero degrees.

@robojax

3 жыл бұрын

it will just display and does not tac action based on temperature.

How can we connect pc to view V/A readings

@robojax

8 ай бұрын

I don't remember what I said in this video. but i never skip explaining any feature and specially if this is capable to be viewed on computer. if it has that feaute, I have shown it. if not, then it does not have it.

@dhayadpi2798

8 ай бұрын

@@robojax thank u for the reply

when you were doing the current measurement the voltage was incorrectly displayed by the Juntek. Why is that?

@robojax

4 жыл бұрын

it was correct. if my wires are not thick enough, some voltage drops on the wires (they act like resistor) and the display shows that.

@mertcapkin7263

4 жыл бұрын

@@robojax ohhh ok, I understand. So this device is worth it to buy?

@robojax

4 жыл бұрын

yes difinately.

Great review but very lazy design: 1. Meters should have leading zero suppression. 2. Bolt through shunt should have been threaded. I would never buy it!

@mrlordjk

3 жыл бұрын

£30 for the VAT4300 ... get me something even close to that for the price ...

I need a meter for 30v 300a,

@robojax

4 жыл бұрын

this is the module for this purpose.

I think you can give 2 separate voltages to the monitor and shunt.

@robojax

3 жыл бұрын

the way I've shown is correct method and it works. Thank you.

How to calibrate voltage?

@robojax

4 жыл бұрын

Usually you don't need it. They have used resistors with 1% tolerance. so it should be okay for the module for at least 10 years.

my battery on the display is always at 100% i cleard all settings and set it to 100% when fully charged battery but dosent drop .how do you set it because booklet is shit😠😠

@robojax

5 жыл бұрын

it drops only if you drain current. what is the capacity of battery and at what rate you are draining the current? if you set the battery to 10A or 10000mA, and you darin 50mA/h it would drain very slowly and you wont' see it. So set your battery for 500mA/h and drain at 100mA or 200mA and you should see it drains quickly. I have tested it and it works. Unless your is defective.

Hello, what's the consumption of this device ? Thanks

@robojax

5 жыл бұрын

Because we are looking at measuring 100 or 200A, I did not pay attention to 50mA or 100mA. I don't know but it is very small.

This unit does not measure low current draw. My system only draws 0.3A and it said 100% even though the battery was almost dead.

@robojax

4 жыл бұрын

Yes of course. this is made for 300A. it's accuracy is 0.5%. so in 300A it has 1.5A error. meaning you will read 1.5A and then 3A, 3.5A and so on any value of 1.5A between two value has no meaning.

Болты на шунте M8 или M10?

@robojax

4 жыл бұрын

M13

I have this device in my Campervan. It works okey. But not very accurate. Loads unter 1 amp will not show up. If my battery is full (12.8V 200ah Lifepo4) and i Set the % to Zero, after 4 days it will show 100%. This means it is measuring the loads around 25% to low every day. Or it measures 100% of the charge but only 75% of the discharge. So after 4 days battery shows 100%. This device is good for rough estimate data. But definetly far from being accurate.

@robojax

4 жыл бұрын

Agreed.

I really enjoy your channel. Very insightful. Not sure if you answer off topic questions. I really could use your input for wiring a relay on this VAC9010H Volt meter. I can't understand the wiring schematics off the instructions. I've contacted the seller , but no help. Here is a link so you can view and hopefullt shed some light. Thanks.....drive.google.com/file/d/1-D0AeiXDSPdwsKMWCVTV_5RJGYyJGsdr/view?usp=drivesdk

@robojax

4 жыл бұрын

You are welcome. Good to hear that. here is solution by looking at your meter,, but I assum you use simple relay so you learn how to do it. But your relay should be able to handle 100A or 200A which is the rating of your device snag.gy/TlY5kq.jpg

I have one and the designer is stupid as the bolt is clamped to the PCB and not directly to the brass shunt. Typically Chinese in that there are some good points but they let the side down with simple design errors.

@robojax

4 жыл бұрын

yes. and unfortunately there is no way to communicate with them to tell them so they fix it. Now this is is still produced with the same design defect.

brother If I want to use to see Solar panel to charging battery I will connect solar charger slot(instead power supply) to connect this module Yes or No?

@robojax

Жыл бұрын

does not matter what you connect. if the voltage is within the range, yes. please see my channel on energy called WattHour youtube.com/@watthour

@user-mh6he6cs6y

Жыл бұрын

@@robojax thx brother

@robojax

Жыл бұрын

you are very welcome.