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How many 100amp hour batteries do you need to connect to a 240v inverter to produce the same output as a 5kva generator for a period of 2 hours?
Wiki User
∙ 15y ago
I am assuming that your batteries are 12V, also that your (12V - 240V) inverter is rated for 5KW output and it is about 95% efficient. Most big inverters are between 85% - 97%. 5KW from a 12V battery would mean a current draw of about 416A, but since the inverter is only 95% efficient the actual current would be closer to 438A. If you draw 438A for two hours, that's 876AH. Theoretically then, you would need 9 100AH batteries. The problem is that at very high current draw, all batteries AH capacity is less than the rating. You only get the whole 100AH if the current draw is 10A (1/10th the AH rating) or less. Because of that, you would probably need 10 to 12 batteries. If you used 10 batteries, each would source about 44A during full load. You would have to use very large bus bars to equalize the current draw from battery to battery. If the interconnects are too small, the batteries closer to the inverter would be forced to supply more than their equal share of the total current draw, and the ones further away less. It's generally problematic to parallel large numbers of batteries in this way. Don't even consider it unless the batteries are identical (same manufacturer, same part number, same age, same date code). The problem gets even worse when you try to recharge the pack. Suppose you pump 50A of charging current into 10 batteries. Is each battery receiving 5A? Or is one battery with a shorted cell drawing all 50 (and is about to explode...)? There's no way to tell. Even if all batteries were receiving equal charge, it would take your 50A charger almost 40 hours to recharge 10 - 100AH batteries. Ouch. Large industrial UPS systems get around this by using huge 2V cells in series. You can buy 6 - 2V, 1000AH cells, connect them in series to form a 12V, 1000AH battery and avoid all the hassles of parallelling 12V, 100AH batteries. They are not cheap, though. If you go to a battery manufacturer's website, they publish graphs for their batteries that show AH derating versus current draw. All this assumes, of course, that your load is really 5KW. If you are running a smaller load, then obviously your battery count would go down. Finally, we are talking extremely large current and power levels here. If you are not fully qualified to understand and design high current wiring systems, don't try this! 400A of current through a bad connection can do serious damage! Unless you enjoy being sprayed with molten metal from a disintegrating connection, know what you're doing or get a qualified individual to help with/inspect your work. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS. If you do this work yourself, always turn off the power
at the breaker box/fuse panel BEFORE you attempt to do any work
AND
always use an electricians test meter having metal-tipped probes
(not a simple proximity voltage indicator)
to insure the circuit is, in fact, de-energized.
Wiki User
∙ 15y ago
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What produces more light series or parallel circuits?
A series circuit will produce more voltage. For example, two 12 volt automotive batteries both have a 600 amp capacity. Connect the 2 batteries in series and you will have 24 volts with 600 amp capacity. Connect the 2 batteries in parallel and you will have 12 volts with 1200 amp capacity.
What is the difference between an Inverter and a Converter?
The term converter usually refers to a DC to DC process where a higher or lower voltage is required. Even when a lower DC voltage is needed, it is sometimes more efficient to use a chopper style process rather than a voltage regulator. Converters are often used to condition dirty or highly variable sources like automotive, aircraft, and marine 12VDC systems into a very clean source of power for sensitive electronics. Many converters have very wide input voltage requirements that allow one design for a wide range of power 8-36 volts or more is not unusal. So you can operate even on almost dead batteries, or on a 24-36 V system without modification. Inverter is a term that implies making AC from DC as in 12VDC input, 120VAC output. This Is the correct answer: DC (batteries) 12v to AC (house) 120v Inverter AC (house) 120v to DC (batteries) 12v Converter
What is the difference between audio generator and signal generator?
Audio generator will produce some range of frequency and level of a test signal meant for audio. A signal generator will produce a test signal but is a more general classification. For example a audio generator is a signal generator. When you know what type of signal you are looking for, then a signal generator will be called that type of signal. all depends on what you are testing. examples: video -> video signal generator audio -> audio signal generator
How are solar cells and batteries similar in function?
Solar cells and batteries are similar in that they both produce electricity.
Do batteries have the ability to generate a flow of electrons?
yes Batteries only produce direct currents
How many 100amp hour batteries do you need to connect to a 240v inverter to produce the same output as a 5?
what do you mean by 5? an inverter just steps a voltage up from a lower voltage( i assume you are talking about a 12v to 240v inverter) 1:20 ratio. so with 100Ah at 12v you should get 240v at 5amps for 1 hour more batteries in parallel will increase this figure.
Does a wind turbine produce ac or dc?
Big wind turbines (as those in a wind farm) generate ac, because it is easier to connect them to the grid. Most of the home turbines generate dc (trough a dc generator or an ac generator and a rectifier) i believe this is because they are often used to charge batteries. The usual way to get ac out of a home dc wind turbine is using a power inverter, just as a photovoltaic system.
Could works a 500 watts of power and 3 phases motor with a wind generator?
Yes, but it would have to be a pretty big and expensive wind generator. You would need an inverter to produce at least 500 watts of 3 phase power. Unless you also had some big batteries, you could only run your motor when the wind is blowing!
What device was chemical energy in portable radios to produce sounds?
batteries or dry cells
How many 100amp hour batteries do you need to connect to a 96VDC inverter to produce the same output as a 5kva generator for a period of 8 hours?
We can only do this in a sketchy way, because some important numbers are missing.-- You didn't mention the voltage of the 100-AH batteries.-- We don't know whether the inverter can deliver 5,000 watts, like the generator can.-- We also don't know the efficiency of the inverter.So we'll go at it in terms of the total energy, we'll assume that the inverter can dowhatever we want it to do, and at the end, we can toss in a term for its efficiency.-- At the back end, you specified 5 KVA for 8 hours. If the generator is 100% loaded,with a power factor of 100%, then that's (5 x 8) = 40 KWH of energy in 8 hours.-- If the inverter is 100% efficient, then 40 KWH is what the batteries need to supply, in 8 hours.-- I'm going to assume that your batteries are the nominal-12-VDC "car battery" type.So you need 8 of them in series to power the 96-VDC inverter.-- The batteries keel over and die after delivering 100 Amp-Hours. At 96 volts,that's 9,600 watt-hours of energy.-- Throughout the 8 hours, you need 40,000 watt-hours. One string of batteriesdelivers 9,600. That's 24% of the total energy required. Instead of 24%, I want towrite it as 6/25 of the total energy. You'll see why in the next line . . .-- Since the one 96-volt string of 8 batteries produced 6/25 of the required total energy,you need 25/6 = 4.1666 strings, in parallel.You have to supply the batteries in sets of 96 volts, in order to run the inverter.So far, the answer is 41/6 96-volt strings.We assumed that a 100-AH battery could actually deliver 100-AH, and the voltagewould never sag. Realistically, you shouldn't count on more than maybe 90% of that.Call that number the "battery margin".We assumed that the inverter is 100% efficient ... all of the energy that comesout of the batteries shows up at the inverter's output. That never happens. There'salways some energy lost in the inverter. I'm going to call the efficiency of theinverter ' E '. It's a percent, it's less than 100, and I'll leave it up to you to find out.So, here's the best I can do: You asked for the number of batteries.-- Number of batteries in each series string = 96/battery voltage .For 12-V car batteries, it's 8 batteries in each string.Each battery assumed to be rated 100-AH.-- Number of strings:(41,666) divided by [ (battery margin percent) times ( ' E ' percent) ]========================Example:Battery margin = 90%Inverter efficiency = 80%Number of strings = (41,666)/[90 x 80] = 41,666/7,200 = 5.79 . . . Use 6 strings.RED FLAG . . .This whole discussion assumes that the inverter is rated for 5,000 watts output or more. If it's not, then this has been an interesting exercise, but please forget the whole idea.Your inverter CANNOT match the output of a 5 KVA generator for more than about 10 seconds.After that, it'll be the clickety-clack of tripped breakers, echoing through the smoke.
How batteries produce electricity?
Batteries do not produce electricity, they only store electricity.
What produces more light series or parallel circuits?
A series circuit will produce more voltage. For example, two 12 volt automotive batteries both have a 600 amp capacity. Connect the 2 batteries in series and you will have 24 volts with 600 amp capacity. Connect the 2 batteries in parallel and you will have 12 volts with 1200 amp capacity.
How can you make a static inverter keeping the frequency at 400Hz accurate?
You can make your static inverter to maintain 400Hz by means of compare the generated frequency of your inverter with the reference buildin frequency generator which is called local oscillator or multivibrator which is fixed at 400 Hz. If your inverter generate frequency grater or less than 400Hz then the comparison between the reference frequency and the generate frequency will produce the error signal to reduce or increase the generated frequence and send it out. This is the principle operation of the Electrical Power Generation System. Post this answer by : tassana.e@thaiairways.com
What is rotary inverter?
"Rotary Inverter: In a rotary inverter, DC electricity input powers a DC motor that turns an AC generator. Rotary inverters are reliable and produce a pure sine-wave output. These inverters have automatic load demand: they begin operation once a load is activated, and shut down when the load is removed. Disadvantages of a rotary inverter are lack of frequency control, low surge capability (50% above maximum rating) and lower efficiency (50% to 80%). Rotary inverters are not as common as electronic inverters."
What do batteries produce?
Energy
Why does the coil have to spin in a generator?
A coil has to spin in a generator to produce electricity.
Why do telephone batteries not cell phone batteries get hot?
Telephone batteries commonly get hot because they are a form of lithium batteries. All batteries contain chemical reactions within them that produce some amount of heat, it is just that lithium batteries produce great amounts of it.
