2000W Pure Sine Wave Car Power Inverter 12V DC to 110V 120V AC 60HZ | with LED Display for RV Off Grid Home Solar System

The bottom line is:This inverter drains my batteries about twice as fast as my Accurate Tools inverter did.This inverter shuts down after when running a 1500-1600 watt appliance for less than 30 seconds.This inverter makes both my microwave and mini fridge hum like my Harbor Freight Modified Sine Wave inverter did.To preface:Input voltage and amperage make a BIG difference on how inverters work. Too little or too much power and the inverter *should* shut down because it won't be able to provide the correct voltage/amperage/and sine wave out the tail end.Note: except where noted, all measurements in the text below were taken with a Meterk MK06 multimeter. The Meterk is a fantastic yet inexpensive tool that I highly recommend for any type of AC or DC electrical measuring.I have a bank of six Duracell/East Penn EGC2 deep cycle golf cart batteries connected in series/parallel. They provide a minimum of 225 amps at 12 volts for a solid 60 minutes straight. Despite this power, to reduce the load on the batteries I start the engine on my Sprinter to supply juice through a 200 amp battery isolator. The alternator is rated at 150 amps and produces 70 amps when the engine is idling. That pumps me up to about 295 amps for running my microwave. 295 amps, though, is actually more amperage than the "main" breaker is rated for many houses.The batteries are connected both to each other and to the inverter with 2/0 ("double-ought") pure copper stranded welding cable. Both cables are 3 feet in length. The diameter of the cable without insulation is 0.36" or 9.2mm. The inverter end of the cables have 0.25"/6mm copper lugs with copper washers on either side. The battery ends have gold plated post clamps. The cables are connected to the array in diagonal opposites to allow the juice to come from the entire array and not just a pair of batteries on either end (or the middle).That last paragraph means that all of the power from these batteries can easily flow into the inverter. That in turn allows it to do its job - generate 2000 watts (4000 peak) of 60 Hz of pure sine wave electricity at 110-120 volts. This is a bit of overkill to run only a microwave that draws 1500 watts (and nothing else simultaneously).I bought this to replace an Accurate Tools 1500/3000 watt model that had a defective fan. That inverter ran my Sharp Carousel microwave that draws 1,500 watts. With that inverter the microwave was just as quiet as if plugged into household AC - that's a sign of pure sine wave power. Except for the fan noise the inverter never complained about my microwave and never shut down under the 1,500 watt load. My mini-fridge also ran so quietly that I only heard it for a second whenever the compressor kicked in. Because the Accurate Tools inverters are in such high demand It would take over a week for it to arrive. I needed an inverter sooner than that and ended up buying this KRXNY.As noted above, when I run the same microwave and/or fridge with this KRXNY 2000/4000 watt inverter three undesirable things happen:1) The microwave produces a loud hum. I had the same issue when running any microwave with a modified sine wave inverter. This leads me to believe that the KRXNY isn't a pure sine inverter.2) The microwave actually takes a few seconds to ramp up to full power. The KRXNY inverter starts beeping (overload warning) once the microwave oven starts to draw a about ~1,200 watts of output. Within a few seconds the oven is up to full power and drawing 1,500 watts from the inverter. Within another 15 seconds the inverter shuts itself down. According to the multi-meter the voltage where the battery cables attach to the inverter posts drops to a minimum of 12.4 volts. That's the reading I got when I tested the now retired 1500 watt inverter. Just before it shuts down the LCD display on the KRXNY 200/4000 inverter reads "11.4" volts, a full volt below the multi-meter and probably where the inverter decides to shut down from low input voltage. Which is perhaps the issue - this inverter doesn't properly measure the voltage supplied to its posts.During this whole time the voltage measured (with the trusty Meterk multimeter) across the entire bank of batteries drops to a low of 12.45v. That's because the inverter is pulling a lot of juice out of them (which is supposed to happen). During this time the display on the inverter reads a minimum of 12.0 volts. Lower than the multimeter but not enough of a discrepancy to matter here.After the inverter shuts itself down I can restart it witha manual reset (flip the switch off, wait a second, flip it back on). This entire process is 100% reproducible, meaning that the inverter shuts down after sustaining a 1500 watt load for less than 30 seconds. The only way I can get it to cook food without shutting down is to run the oven on the 40% setting. BTW that doesn't mean that the oven draws or outputs 400 watts. Power level 4 means that the magnetron (the component that actually generates the radiation) only runs for 4/10 of the time that the microwave is running. Power level 4 is not what I bought this inverter for.3) Oh yeah. With the Accurate Tools inverter my array of house batteries lasted at least two days before needing me to connect an external charger. With the KRXNY the batteries were run down to 60% capacity within 12 hours. 50% is the lowest you want to go. So I ended up running my engine for a few hours just to charge up the batteries.Long winded? Maybe. But detail that may help you or give you reason to disagree. Either is fine by me.Lucky for me this KRXNY inverter is less than a week old. It's going back.

The second time I better he's got too low, the alarm did not sound. I shut it off immediately but I had to wind up charging both new batteries for two days before I could use it again. Which stinks when you're traveling full time

I used this product on my camping trip, it did exactly what I needed it to.

Good for the price. Very quiet operation It doesn’t hum which I love. You even doubt if it’s on.

This power inverter does what it is supposed to do. The only reason I did not give it five stars is because it only has one 110/120v American Plug and the connection wires are too short, less than a foot in length each. However, it does deliver in performance which is one of the most important things regarding an item like this one.

Read the reviews on this and was worried so just before the return deadline I hooked it up, While it's true it uses a lot of power for the output it works great and runs a microwave almost as well as household current, at this price I'm calling it a win and do recommend it highly

I bought this for one purpose....due to cov 19.. we can no longer use our canteen as we did so to warm food at lunch I got a 600 watt microwave and this krxny 2000 watt inverter... hooked up in my pick up truck...so far it works great... good pure sine no humming

I had it for a few months and it works perfectly. To be honest this is the only inverter I've ever used but it does exactly as advertised, easy to install, great cables included. Nothing wrong with it at all.