How does the Power Supply respond to running it on a "modified-sine-wave" inverter ? or, does it need a pure sine-wave inverter ?
484595
Hi Frank, my husband Jerry purchased this power supply for his work and he says he loves it and uses it almost every day. It converts 115 volts ac to 48 volts dc output. It has a rheostat from 12-48 volts output and it works great. He uses it on microwave telecommunications equipment.
484596
To answer your question, I just walked down to the basement and plugged my 48V Genssi power supply powering a DC fan into an APC BackUPS 500, pulled the input plug on the UPS (which causes the UPS to output a modified sine wave) and it had no effect on the operation of the power supply. I ran the fan from low speed to high, then plugged the UPS back into the wall to switch it back a pure sine, but I could detect no effect on the power supply. I hope that helps.
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.
484598
Frank, I don't know how it would respond to the modified sine wave but maybe there is an easier solution. From the nature of your question and this device I assume you are starting with a DC power source (12v car battery?), inverting it to 120v AC, and then converting it back to 48v DC with this power supply? If that is the case then you could skip a step and achieve greater efficiency by just using a DC voltage regulator that allows you to step up the voltage--Amazon sells them (eg. http://www.amazon.com/DROK-Converter-Voltage-Regulator-Charger/dp/B00BZR9PBW/ref=sr_1_1?ie=UTF8&qid;=1393267559&sr;=8-1&keywo;rds=12v+to+48v+converter). I hope this helps! Frank, I don't know how it would respond to the modified sine wave but maybe there is an easier solution. From the nature of your question and this device I assume you are starting with a DC power source (12v car battery?), inverting it to 120v AC, and then converting it back to 48v DC with this power supply? If that is the case then you could skip a step and achieve greater efficiency by just using a DC voltage regulator that allows you to step up the voltage--Amazon sells them (eg.... » Read More Frank, I don't know how it would respond to the modified sine wave but maybe there is an easier solution. From the nature of your question and this device I assume you are starting with a DC power source (12v car battery?), inverting it to 120v AC, and then converting it back to 48v DC with this power supply? If that is the case then you could skip a step and achieve greater efficiency by just using a DC voltage regulator that allows you to step up the voltage--Amazon sells them (eg. http://www.amazon.com/DROK-Converter-Voltage-Regulator-Charger/dp/B00BZR9PBW/ref=sr_1_1?ie=UTF8&qid;=1393267559&sr;=8-1&keywo;rds=12v+to+48v+converter). I hope this helps! « Show Less
1763210
Yes with a 400 watt inverter...pure sinwave inverter preferably...but nonetheless an inverter
1299810
It is my understanding that it is NOT a pure sine wave. I do run a HDTV and Blu Ray player with it and have had no issues
643702
I do not think so. Be careful with inverters of this type. They are called "modified sine wave inverters" And what you really need is termed a "True Sine Wave Inverter." A modified sine wave inverter delivers a digital wave form that over time will destroy your laptop. It also is very probable that it is what is causing your problems. A "True Sine Wave Inverter" produces a real waveform and also switches at 60HZ. It gives the same purity of,power as your electric company does. However these are more expensive then the modified sine wave models are. Most of those come with warnings not to use any devices that need chargers.. Examples of true sine wave inverters are made by Samlex, Xantrex, ( my two favorite producers ) and a few other companies.
231053
I am not sure I understand your question. This unit is an inverter and produces a modified sine wave output at the stated voltage range. It normally uses commercial sine wave AC current to drive the inverter, but if you want to use use non commercial power like a portable generator or newer portable inverter, there is no reason it would not work but I have never used it in the arrangement. Some generators and inverters have 12 volt outputs anyway but not at 20-30 or 50 amp rating like this unit can supply. If you plan to use an inverter to drive this inverter, you can expect some additional noise in some sensitive devices like a nearby AM radio. I gape this answers your question. I am not sure I understand your question. This unit is an inverter and produces a modified sine wave output at the stated voltage range. It normally uses commercial sine wave AC current to drive the inverter, but if you want to use use non commercial power like a portable generator or newer portable inverter, there is no reason it would not work but I have never used it in the arrangement. Some generators and inverters have 12 volt outputs anyway but not at 20-30 or 50 amp rating like this unit can supply. If you plan to use an inverter to drive this inverter, you can expect some additional... » Read More I am not sure I understand your question. This unit is an inverter and produces a modified sine wave output at the stated voltage range. It normally uses commercial sine wave AC current to drive the inverter, but if you want to use use non commercial power like a portable generator or newer portable inverter, there is no reason it would not work but I have never used it in the arrangement. Some generators and inverters have 12 volt outputs anyway but not at 20-30 or 50 amp rating like this unit can supply. If you plan to use an inverter to drive this inverter, you can expect some additional noise in some sensitive devices like a nearby AM radio. I gape this answers your question. « Show Less
247890
The inverter doesn't draw much power. Just depends on what you have plugged into it. I ran a sump pump with it so it's designed to handle a lot
251276
A small inverter may do the trick but be sure that you have a return option if there is a problem. Most inverters produce square wave A/C (not sine wave) and may not work with some electronic devices. A 100 Watt unit may do but 200 Watts is better. Plan on spending $20 to $40 for one. Another option is a portable power supply with a built-in inverter (the kind with jumper cables).
117823
Hello, hhis pure sine wave inverter have input 12 VDC, output 110 VAC, the automatic switch we have on 110VAC side if electricity fail, power inverter energize my house illumination
442948
The unit has high-temperature safety shutdown, low-voltage shutoff and overload protection. From the manual: The inverter produces a "modified sine wave." The modified sine wave is suitable for most AC powered appliances and personal electronic devices.
1964438
Mitch: It's not an inverter-quality "clean." Plug all your sensitive electronics into an APC/UPC battery-backup-surge-protector and you'll be good to go. Or go through a transfer switch to your building's main circuit panel. H--da has "clean" ones... ahem.... half-the-power and THREE-TIMES the price... Your choice, but these are good units. Good Luck!
515879
Hope this helps. http://www.alibaba.com/product-detail/Modified-Sine-Wave-Power-Inverter-2000W_60309768541.html?spm=a2700.7724838.29.1.XtvZrl&s;=p
2193074
I have blown inverters that have matching capacities to the PV's. A good rule is to give yourself extra capacity. Although your PV array is rated at 1000 watts your are probably producing 700watts tops. You are probably wondering if you can get away with using a 1000 watt inverter. I wouldn't risk it. I've done it in the past, but heat is your enemy. Over rate your system with a 1500 inverter and spare yourself the aggravation of living on a prayer. P.s. lengthen the life of your inverter by cooling it with a low wattage fan.
545178
Inverters do not have High Start-Up Amps. They start at zero speed and catch up as needed. So you do not need to worry about this issue.
1798464
I used a 'scope to fine adjust the frequency and seem to recall it was close to a pure sine wave, quite clean power. It powers all our electronic equipment without a problem. I adjusted the frequency using the peaks of the waves to stop our UPS's from complaining
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
2043108
I have this inverter, and my understanding is that it is pure sine wave. I use it to power my entire vacation house on a Caribbean island with no troubles, save for the fact that the vacuum cannot run at the same time as anything else.
270172
No, buy a solar charger, and fine a true or pure sine wave power inverter that suits your needs