WZRELB 4000W Pure Sine Wave Inverter, Car Power Inverter 12V DC to 110V 120V AC Converter for RV, Truck, Solar, Outdoor with Dual AC Outlets, Hardwire Port, Surge 8000W, LED Display,Off-Grid

I bought this inverter for use when power is out at my ski condo. I have a transfer switch for a generator input but I didn't want to store gas and have to worry about stabilizing gas and cleaning carburetors and such. So I got a 1KW inverter from an auto store and made a cheater cable to connect the single-phase inverter output to the split-phase generator input socket. It worked, but it couldn't run the fractional horsepower motor in the central heating system. The furnace (a modern high eff. double conversion gas furnace) would come on and burn but when it heated to the point that the whole-house fractional horsepower blower started, the small inverter would overload and cut off. Then cycle all over again and again.Reading the specs carefully, the 2X wattage "peak power" that *every* inverter claims is only good for a millisecond or two. While a motor takes many seconds to rev up so -- no dice. So I bought this WZRELB Reliable 4000W Solar Power Inverter 12VDC to 120V for it's 4KW continuous power rating. It comes with two set of (#5 gauge or so) power leads which I hooked up to heavy duty batter clamps. I hook this on my car battery run a 50 foot #12 to the generator cheater and start the car. The car *has* to be running or the inverter will suck the life out of a battery. In fact, at these power levels, the input to the inverter will dip below cutoff if the car's charging system is not supporting the battery.The inverter and AC wiring can handle the surges but the car's alternator and battery cannot sustain that forever. But car batteries being what they are: there to start the car for a few seconds, they can start a large AC motor for a few seconds, too. As long as the inverter and AC wiring can handle it. This one does.I've used this on top of my car's air filter in a snow storm and it starts my furnace fan just fine,, many lights, too -- LEDs with dimmers and they all worked. The surge capacity can handle anything Iv'e thrown at it. Just can't leave more than about 1.5KW sustained or I'll exceed the 130 amp alternator and start draining my battery.

I connected this inverter to 4 group 29 marine batteries in my trailer. I have 5000 and 13500 BTU AC units. It powered the 13500 BTU unit on a 100 degree day for 1.5 hours before the batteries got low. Started my generator which is only connected to a 100 amp battery charger. The AC unit then continued on the inverter just fine. It powered the 5000 BTU unit all night with no generator and I made coffee with my Keurig coffee pot in the morning. Still had 12 volts on my batteries. Worked great.

Voltage drops to unsafe levels when load is applied, as a hobbyists works as long as it has low amp requirements. Acting like it's 200w when it's time for power. Start up dc current draw 2/0 wire 2ft long .40amp dc and cannot provide 7.5ac output 120v...ac output at94vac.

Trying to use a little welder in my barn. The welder wont run in modified sine wave so I upgraded to the pure sine wave unit in 5000watt 12v volt. The welder starts and sounds normal but wont weld. Just get an overload alarm on the inverter. The instructions say that if your unit comes with more than two cables (1 positive and 1 negative) that you must use them all. Mine came with 2 of each in #4 gauge. No chance! Didn't do anything. I ended up upgrading the cables to 0000 (4/0) gauge and added four more batteries (8 total) to get the welder to work.

It works excellently, and fast delivery would order from them again. I thought this was the problem with my solar power, but it was not. I changed it to this one anyway.

I have a 24v setup with 8x 125AH @12v AGM; 4x 320W Renogy solar panels; and a 60A Outback charge controller. But this inverter always shuts off on me and alarms, even when the batteries are fully charge — anywhere from 27v down to 24. And I don’t ever go below 23v. Sometimes the volt meter will even read the wrong voltage.

I now own 3 reliable inverters. Two 24 volt and one 12 volt. My 24 volt has been running continously for 6 months without any problems, running a medium sized fridge, lights and a 260 watt gaming computer. All three inverters are 1500 watts. I try to keep the loads down to 1000 watts or less. Excellent inverters. The customer service is also excellent. Very attentive and helpful. FYI ..always use heavy gauge input wires. They can never be to large but they can easily be too small. Lots of amps going from the batteries to the inverters. Rule of thumb for all inverters. Also use a 200 amp fuze in between batteries and inverter.

This small 1500w does good for small things. I have run my 2 refrigerators and 2 freezers as well as lights and tv at the same time. It struggles to run even the smallest 5k air conditioner. It wasn't designed to run that much, but the 3000w will. Know what you want to do and err on the size of larger if you are guessing which size you need. I use this when my energy needs are low and need lower energy consumption during extended power outages.I haven't run this unit much, but have used the 3000w almost daily for 8-12 hours. The last one lasted a year when I blew it up. Lightening took one out and a cross connection took out another one. Do isolate both the hot and neutral if you hard-wire to a panel or transfer switch.