is this pure sine wave?
1802397
No, it is not, and this inverter will not put out more than 100 volts under the best of conditions, it is JUNK.
1721994
I don't think so. I can tell you that the sounds are very realistic and do not sound "looped" at all.
1942433
I have this since Jan 2012 and I work fixing UPS, I have all the equipment to test how pure the sine wave is and let me tell you! I have put on my fluke dual input at the same time utility and this and I would say the output of this UPS is actually more clean then the actual utility I would take pictures if anyone wants too see both in comparison.
1494477
I don't think so. The length of a horizontal bar at the bottom shows the frequency and strength of the heartbeat, but there are no actual waves showing the spacing and strength of heartbeats.
484597
We haven't run it with such an inverter, but we did look at the circuitry inside when evaluating it, and it shouldn't need a pure sine-wave. In fact, it only pulls power at the peaks of the sine wave (it has around a 0.7 power factor), and will actually run with an appropriate high-voltage DC input instead of AC. So it shouldn't care if your inverter is "modified-sine-wave". Your inverter, however, may care that the supply only pulls power during part of the cycle, and you may therefore need an inverter with a higher peak output power/current than you were expecting.
1279503
This power supply is designed for providing a very clean sine wave power for sensitive computers and other electronics for a very short period. This power supply will not work well with a sump pump which needs more capacity an does not need a clean sine wave for power.
1822809
Answer from Wikipedia: A power inverter device which produces a smooth sinusoidal AC waveform is referred to as a sine wave inverter. To more clearly distinguish from "modified sine wave" or other creative terminology, the phrase pure sine wave inverter is sometimes used. The terminology "modified sine wave" has come into use and refers to an output waveform that is a useful rough approximation of a sine wave for power translation purposes.
321328
No, the inverter is Modifyed, we can supply a pure syne wave for an additional $150.00 Thanks, OG Solar
2102055
Modified sine wave. PURE would have been twice the cost so i settled for this one for my needs.
2249398
As another said, it's because the inverter puts out a "Modified sine wave" where it's power isn't exactly the same as house power. If you have an electrical workers oscilloscope, you'd see the house power curve up to the max and drop down in a curve, any power inverters that aren't labeled "True sine wave" just put out pulses of power with it instantly jumping to max, staying on max for a few milliseconds, then turning off (with no curves). I don't know fully why the "buzzing" comes thru, but it is the inverters power (and I've seen that explained in power inverter manuals). As another said, it's because the inverter puts out a "Modified sine wave" where it's power isn't exactly the same as house power. If you have an electrical workers oscilloscope, you'd see the house power curve up to the max and drop down in a curve, any power inverters that aren't labeled "True sine wave" just put out pulses of power with it instantly jumping to max, staying on max for a few milliseconds, then turning off (with no curves). I don't know fully why the "buzzing" comes thru, but it is the inverters power (and I've seen that explained in power... » Read More As another said, it's because the inverter puts out a "Modified sine wave" where it's power isn't exactly the same as house power. If you have an electrical workers oscilloscope, you'd see the house power curve up to the max and drop down in a curve, any power inverters that aren't labeled "True sine wave" just put out pulses of power with it instantly jumping to max, staying on max for a few milliseconds, then turning off (with no curves). I don't know fully why the "buzzing" comes thru, but it is the inverters power (and I've seen that explained in power inverter manuals). « Show Less
998647
Peetty sure it is modified. Dont know ecatly what true sine is. Goes to the manifactures web page. They explain
1717891
I am a retired electrical engineer so I can tell you it is not necessary to scope the output of this inverter to tell you the output looks like crap as compared to a pure sign wave inverter. It is a modified square wave output that simulates a sign wave as close as possible. The only advantage of this inverter is it is cheap and has the ability to start inductive loads rather well because it can supply the necessary current needed to achieve motor starting. I use this inverter to run saws, drills, and a small air unit in my shop. I have to pure sign wave inverters that run my home because many electronic appliances require a pure sign wave. You can look up modified sign wave on the internet to see the difference in a modified sign wave and a pure sign wave. Hope this helps in your decision making.
1024163
Hi Glen ,This is not a pure sine inverter.Please read the additional facts below.The inverter have three Power Index1.Marked power2.Peak Power3.Long time working powerNormal Output Power means the Peak power.Peak power is the moment Maximum power when we start the electric equipment.this peak power might be 1.5-3 timesDifferent electric equipment have different peak power. We need to know the rated power (Average Power) before we choose the Electric power supply ( like the inverter or battery). The power supply is 1.5-2 times. Electric equipment power,special electric equipment will need 3 times of Electric Power.General Average Power is counted according to 72% of peak power.This accounting methods usually is for small power electric equipment. Hi Glen ,This is not a pure sine inverter.Please read the additional facts below.The inverter have three Power Index1.Marked power2.Peak Power3.Long time working powerNormal Output Power means the Peak power.Peak power is the moment Maximum power when we start the electric equipment.this peak power might be 1.5-3 timesDifferent electric equipment have different peak power. We need to know the rated power (Average Power) before we choose the Electric power supply ( like the inverter or... » Read More Hi Glen ,This is not a pure sine inverter.Please read the additional facts below.The inverter have three Power Index1.Marked power2.Peak Power3.Long time working powerNormal Output Power means the Peak power.Peak power is the moment Maximum power when we start the electric equipment.this peak power might be 1.5-3 timesDifferent electric equipment have different peak power. We need to know the rated power (Average Power) before we choose the Electric power supply ( like the inverter or battery). The power supply is 1.5-2 times. Electric equipment power,special electric equipment will need 3 times of Electric Power.General Average Power is counted according to 72% of peak power.This accounting methods usually is for small power electric equipment. « Show Less
2186262
I purchased one about a year ago. I returned it because when I connected my iPad to it, the iPad went crazy. I was using the stock power supply that came with it. I tested this several times before I returned it. To answer your question, it is probably NOT a pure sine wave inverter. I ended up getting a Xantrex Prowatt pure sine wave inverter.
778325
No this is a modified sine wave inverter----we have had trouble with this inverter being able to work with one type of cordless tool charger-----so we purchased two different brands of pure sine wave inverters to see if this would in fact eliminate our problem-----it did not so we went back to this inverter and have not had any other issues with it not running any tools with the exception of the one----and that was solved by putting 12 V vehicle chargers in all the service trucks-----we run over 140 of these and they have been bullet proof---1 failure in 140 plus units in service
1299813
Negative, this is a modified wave inverter. They are designed to emulate pure sine waves, but the pure sine inverter from power bright is a bit more expensive and can be found on amazon. Just search pure sine power bright.
1763210
Yes with a 400 watt inverter...pure sinwave inverter preferably...but nonetheless an inverter