This entry was posted
on Thursday, July 30th, 2009 at 10:06 pm and is filed under Uncategorized.
You can follow any responses to this entry through the RSS 2.0 feed.
You can leave a response, or trackback from your own site.
8 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.
Can you take your mounthly usage from utility bill to determine size of inverter needed to run whole house? Do inverters come big enough to handle 30kv or more? Would you have too have several inverters to run household broken down into different zones?
Sincerly,
Wanting to get off grid and, be green!
Can you take your monthly usage from utility bill to determine size of inverter needed to run whole house?
This is not the best way to find your usage. You need to go to each appliance and get its individual rating, also you need to estimate how long each of these appliances run daily. Once you have this time study information, you will know what your daily usage is. Then you will know amount of power you need to generate solar, wind etc.
Do inverters come big enough to handle 30kv or more?
You could use these in several zones to get to the 30000 watts you are looking for. I am assuming you said 30kv but actually meant 30kw.
Would you have too have several inverters to run household broken down into different zones?
This is another reason we need to have a short list of all the appliances in your house, so we can make the proper recommendation to help you get off the grid.
You will need to have a battery bank feeding these inverters.
What type of batteries are you currently using/or thinking of buying? What voltage and amp hours?
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.
Great information provided here… I love it
Thanks for checking out our blog, please let us know if you have any questions.
Can you take your mounthly usage from utility bill to determine size of inverter needed to run whole house? Do inverters come big enough to handle 30kv or more? Would you have too have several inverters to run household broken down into different zones?
Sincerly,
Wanting to get off grid and, be green!
Can you take your monthly usage from utility bill to determine size of inverter needed to run whole house?
This is not the best way to find your usage. You need to go to each appliance and get its individual rating, also you need to estimate how long each of these appliances run daily. Once you have this time study information, you will know what your daily usage is. Then you will know amount of power you need to generate solar, wind etc.
Do inverters come big enough to handle 30kv or more?
You could use these in several zones to get to the 30000 watts you are looking for. I am assuming you said 30kv but actually meant 30kw.
Would you have too have several inverters to run household broken down into different zones?
We have AIMS 7000 watt industrial inverters that are perfect for this application. You can look at our AIMS Modified Sine inverters, our product number PWRIG7000W, is a great fit here.
I would recommend that if you have 220 appliances that you set up a 220 zone. I would recommend this inverter, product number PWRIG700024024, this is the AIMS Industrial Grade 7000 Watt 24Vdc to 240Vac Power Inverter.
Another thing to keep in mind is depending on the electronics if you are using computers, printer, flat screen tv or microwaves. These electronic appliances can require a pure sine wave power inverter, I would recommend AIMS 3000 Watt PURE Sine Wave Power Inverter 24V, product number PWRI300024S.
This is another reason we need to have a short list of all the appliances in your house, so we can make the proper recommendation to help you get off the grid.
You will need to have a battery bank feeding these inverters.
What type of batteries are you currently using/or thinking of buying? What voltage and amp hours?
We sell a full line of Lifeline batteries on our site, theinverterstore.com
Thanks for the questions,
Please let us know if you have anymore.
theinverterstore.com