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4 Responses to “A Power Point Presentation On Connecting Power Inverters To Batteries”
Calculating the power requirements for an inverter is straightforward. How does one determine a pure sine wave output is required or a modified sine wave will do? This makes a 2X difference in cost.
In the fourth slide in your Multiple Battery Presentation, I believe that the inverters should be labeled “24-volt Inverter” rather than “12-volt Inverter” since the battery configurations shown both are both 24-volt.
Interesting website, full of useful information. It certainly has helped with my planning.
Hello Peter,
Pure sine inverters product a true rolling sine wave vs. a stair step wave that tries to mimic a pure sine wave. The pure sine wave inverters product cleaner power.
•major advantage of a pure sine wave inverter is that all of the equipment which is sold on the market is designed for a pure sine wave. This guarantees that the equipment will work to its full specifications.
•Some appliances, such as variable speed motors and microwave ovens will only produce full output with pure sine wave power.
•A few appliances, such as bread makers, light dimmers, and some battery chargers require a pure sine wave to work at all.
•audio equipment, satellite systems, and video equipment, sound and look cleaner using pure sine wave inverters.
•these are the most expensive of the inverter designs and outperform all other types of inverters, regardless of use.
•use this inverter for electric shavers and emergency flashlights, garage door openers, laser printers and large strobes used in photography
Modified Sine Wave (quasi-sine)
A modified sine wave inverter actually has a waveform more like a square wave, but with an extra step. A modified sine wave inverter will work fine with most equipment, although the efficiency or power of the equipment will be reduced with some.
•Motors, such as refrigerator motor, pumps, fans etc will use more power from the inverter due to lower efficiency. Most motors will use about 20% more power. This is because a fair percentage of a modified sine wave is higher frequencies – that is, not 60 Hz – so the motors cannot use it.
•Some fluorescent lights will not operate quite as bright, and some may buzz or make annoying humming noises.
•Appliances with electronic timers and/or digital clocks will often not operate correctly. Many appliances get their timing from the peak of the line power – basically, the modified sine has a flat top rather than a peak – this may cause the occasional double trigger. Because the modified sine wave is noisier and rougher than a digital pure sine wave, clocks and timers may run faster or not work at all.
•Items such as bread makers and light dimmers may not work at all – in many cases appliances that use electronic temperature controls will not control. The most common is on such things as variable speed drills will only have two speeds – on and off.
•most equipment will operate without any noticeable difference, and because the lower cost, makes this the most common inverter sold and generally the only type found at your local retailer.
Calculating the power requirements for an inverter is straightforward. How does one determine a pure sine wave output is required or a modified sine wave will do? This makes a 2X difference in cost.
In the fourth slide in your Multiple Battery Presentation, I believe that the inverters should be labeled “24-volt Inverter” rather than “12-volt Inverter” since the battery configurations shown both are both 24-volt.
Interesting website, full of useful information. It certainly has helped with my planning.
Hello Peter,
Pure sine inverters product a true rolling sine wave vs. a stair step wave that tries to mimic a pure sine wave. The pure sine wave inverters product cleaner power.
•major advantage of a pure sine wave inverter is that all of the equipment which is sold on the market is designed for a pure sine wave. This guarantees that the equipment will work to its full specifications.
•Some appliances, such as variable speed motors and microwave ovens will only produce full output with pure sine wave power.
•A few appliances, such as bread makers, light dimmers, and some battery chargers require a pure sine wave to work at all.
•audio equipment, satellite systems, and video equipment, sound and look cleaner using pure sine wave inverters.
•these are the most expensive of the inverter designs and outperform all other types of inverters, regardless of use.
•use this inverter for electric shavers and emergency flashlights, garage door openers, laser printers and large strobes used in photography
Modified Sine Wave (quasi-sine)
A modified sine wave inverter actually has a waveform more like a square wave, but with an extra step. A modified sine wave inverter will work fine with most equipment, although the efficiency or power of the equipment will be reduced with some.
•Motors, such as refrigerator motor, pumps, fans etc will use more power from the inverter due to lower efficiency. Most motors will use about 20% more power. This is because a fair percentage of a modified sine wave is higher frequencies – that is, not 60 Hz – so the motors cannot use it.
•Some fluorescent lights will not operate quite as bright, and some may buzz or make annoying humming noises.
•Appliances with electronic timers and/or digital clocks will often not operate correctly. Many appliances get their timing from the peak of the line power – basically, the modified sine has a flat top rather than a peak – this may cause the occasional double trigger. Because the modified sine wave is noisier and rougher than a digital pure sine wave, clocks and timers may run faster or not work at all.
•Items such as bread makers and light dimmers may not work at all – in many cases appliances that use electronic temperature controls will not control. The most common is on such things as variable speed drills will only have two speeds – on and off.
•most equipment will operate without any noticeable difference, and because the lower cost, makes this the most common inverter sold and generally the only type found at your local retailer.
Hello Bill,
Good catch. Thanks for taking the time to let us know.