I was (kind of) wrong!!! I'm retesting this cheap inverter! WZRELB 600 watt 24 volt inverter

I did a video a few weeks back on this inverter and it performed horribly. This video is a follow-up because the way the inverter was acting did not make sense to me and I wanted to make sure I didn't do something wrong. I came up with a few theories but I don't think I figured out why it has issues with some appliances. It turns out that it is kind of a beast but there is a trick to it that I still don't completely understand. If you know why this thing does what it does, help me out! I'm totally baffled.

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[GoingOffGrid]

this inverter is to small for high frequency switching devices like your 12v charger, even the larger models will not like it but will run it. it messes with the inverters switching ability to make the higher voltage.

[tehdreamer]

I have a 12v 800w version of this in my campervan and its been superb so far, maybe a bit noisy when the fan comes on with high continuous load. I've ran power tools from it and even small electric heaters. Mostly I use it to power my laptop and monitor plus occasional blender and charging various devices, plenty of juice for me. Idle consumption is around 8-10W. Later versions have a remote to turn it on and off which is handy.

[offgridliving]

I have a 1500w same manufacture for the last 4 years and it works flawlessly. I run my entire 30’ RV from it with 2 big Deka 6 volts in series.

[kuhrd]

Since this is a HF inverter design, it works well with devices that either appear as resistive loads or have only a small difference between real power and apparent power. Assuming the output is filtered reasonably well, devices that use switchmode power supplies should run just fine along with devices that have a resistive load. Devices that have a high surge or inductive load probably won't run very well on this inverter.
If you want to run inductive loads or loads with high surge current, you should look for LF inverters. Inverters that are installed in houses for off-grid installs are almost always LF inverters since they can handle the surge and inductive loads and most often can also handle the higher needs of a whole house inverter.

[TheGrimshaw]

Very very good inverters, they are truly reliable. I have a 24v 3000watt and it powers 60% of my 2 bedroom home comfortably.

[KnowledgeCravings]

I also support many inductive load explanations here. I saw that with my 600W Giandel pure sine wave inverter too. I plugged in my A/V amp (rated 250W) to it along with some other resistive loads(very small like 50w) . With power meter they consumed less than 300W while running. So I thought would have no problem. But the moment I turned on A/V the inverter shut off and never recovered. I found that the A/V has lot of inductive power electronics like transformer inside. I measured an inrush current of 12Amps at 120V which is 1400W for a short duration. As the peak of my inverter is 1200W, it made inverter go crazy and never recover. Learnt a lesson about inductive loads afterwards.

[jjthegreat]

So the issue here is that the inverters have a super easy time with resistive loads which is your coffee make and heaters. Where it has a harder time is with things like inductive loads where you have to compensate for something called a "power factor". For example, lets say you have a 500w motor that consumes that when its running. Inductive loads like a motor can have a power factor of 0.5 meaning you have to have a power supply that can put out 1000w of juice. Willing to bet that DC DC power supply used on the charger has a really crappy power factor rating killing the inverter. The watt meters on the inverter will typically show average load without power factor compensation. Look on amazon for a "kill a watt" plug in power meter for 10 bucks. Aside from measuring stuff in watts, it can display power factor as well.

[mannyfragoza]

this is just a guess but possibly bad solder joint either with one of the MOSFETs or on the inside somewhere where the wire connects to the AC plugs or maybe just a poor connection there.

[Mag]

The items it did not power may need a pure sine wave to function properly. At the price you said this was, it is likely a modified or even a square wave inverter. Those do not put out "clean" power, and some items just have to have that clean juice to make them function properly. Typical items that need that pure sine wave can be microwaves, laser printers, 3d printers, variable speed tools, some battery chargers, and some medical equipment, to name a few.
Of course, there are items in that list that will run okay without the pure sine wave (depends on the brand and build, etc) but in some cases, even if they run, they will not be operating efficiently.
Pure sine wave inverters have come down in price, and you can find a 2000 watt one for about $180-$220 on average. (and a 1000 watt one for about $130) - It would be interesting to pick one of these up (or borrow one) and give the items another test.

The only other thing that I can think of is most inverters have a floating type ground. That is, they do not have the same ground as your house and likely your solar grid. (A wire going to a stake in the ground) - This is not usually an option with inverters mounted in a boat or an RV rolling down the highway. 😁
If you stick a common circuit tester in it, it will like be showing open ground, - potential of electrocution. If your inverter has the external ground post or screw, you could try running a wire from it to a ground in whatever place it is being used in. (Also, mounting it to a metal surface can help, if it has raised mounting flanges. If it does not, then I would not do that step, due to most have vent holes in the bottom, and without the raised mounting rails, you may be blocking some venting.) In these cases, the N and G wires can be jumped together if they are at zero volts. This often tricks the inverter in to thinking it has an earth ground. (like jumping the green wire to the white wire on a socket in your house will make a socket tester show the electric socket is grounded properly.

With all this said - I am not a licensed electrician, and all of this should just be considered as possible steps and reasons. Everyone should do their own research and/or hire a competent and licensed electrician for any help they need. (PSA over now)

Cheers!

[selvinteletubbie]

Podria mantener una mini refrigeradora de forma continua con este inversor ?

[harrrytoool]

My wzrelb 3000 watt inverter from reliable power tripped my equipment and then started to smoke. Power maybe reliable? ... Not recommended. Other you tube reviews show zero short circuit protection. Risk of fire or damage to unit is possible and therefore expense.

[jasonbrown]

in a few days i will be receiving my 48v 5k psw inverter from this company. it will be bouncing back and forth between two 20kw 48v banks.

[pyronmasters]

I have the 24v 800w version, I dies 3min in when I plug in my 15w laptop charger (it has a ground pin) however It can run a 100w pedestal fan no prob😂

[xizuQ]

It’s a 600 watt inverter but the max total is 1200 watt peak.

[PatricksDIY]

So you plugged in a charger from the batteries you are trying to charge? no wonder you are having issues...you are pulling out more power than you can put in when you do that with the conversion with the charger, it seems to you pulling the voltage "out from underneath it" so to speak. it appears based on what I can see is you are draining the capacitors in the inverter with tha current draw from the charger, since its the same connection you are pulling and charging from...

[tonypower]

Can you check if the voltage from the hot line on this inverter is 60 volts and the neutral???...is the inverter ground prong in the inverter...connected to the neutral??? Thanks

[jaysonwallker]

Have you tried putting it on an oscilloscope?

[SigmaWorksSWD]

i have made same tests with my 500watt reliable power... its more capable than writen ;)

[bigbuds]

The test leads that come with any inverter are junk.

[harrrytoool]

My wzrelb 3000 watt inverter from reliable power tripped my equipment and then started to smoke. Power maybe reliable? ... Not recommended. Other you tube reviews show zero short circuit protection. Risk of fire or damage to unit is possible and therefore expense.