Typically Microwaves are 1000 devices. So you will need a larger than 1000 watt "inverter" to use it. 1000 watts at 90% efficiency is still about 100 amps of current draw. That is 1/0 guage wire if it is over 5 ft long to power the inverter. Energy is NOT free. Takes power to make power.
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Make sure the connections to the batteries are clean and tight and cables are clamped adequately. Also make sure the wire is of adequate gauge to handle 100 amps minimum. If you are using only 12 gauge wire for any distance, that is too small for 12 volts.
The current being drawn at 900 Watts is 75 amps on 12 volts not counting the draw for the inverter operation.
hi there, if you're using your power inverter to run your microwave oven isn't it? surely it is not advisable to plug this appliances for this really consume a lot of power...and eventually overload your PWR Invrter..if you use you power inverter in diff. load like lightings or a small dvd plyer and runs smoothly...is your microwave has no deffect if plug in wall socket and still blown the fuse...you have a deffective microwave oven..every time you replace the fuse w/ same type or ampereage and still blown you have a shorted power supply...try to bring your microwave oven in service center...nice day..
I think you are probably not going to have enough start up power for a microwave.They draw alot of amps on start up and I think your tv or dvd will pull about 1/3 to start.
I have a 8750 watt max watt generator and my wifes microwave is the only appliance in the house other than dryer that will make it change rpms.
Hope this helps you. Thanks
Well without knowing exactly how you wired it, it is hard to say what happened. A little diagram would help. But, with nothing plugged into the inverter, the wires must have been shorted. What size wire are you using? If you have an 800W inverter, the amperage on the secondary, (120V) side is only about 6.5 amps. So if you ran 14 ga wire (smallest you should use on 120V ) that should be fine for the 120V circuit. Do not connect any of these wires to anything but your remote receptacle. Now for the primary. Notice how large the terminals are on the supply side, if you have an 800W load @ 12V that would be approx 66amps. Therefore you should have #4 or #6 copper wire going from the battery to the inverter. This wire must be fused, and I'd fuse it with a 60A fuse. You can buy nice fuse holders like they use on amplifiers that connect right to your battery. Now on the 1200W unit, you can imagine the difference. The secondary would be 10amps and the primary would be a whopping 100A. Even if you have a large alternator, I'm sure it is not rated at 100 amps continuously.
This units have fuses, they are located right where the power wires come in and go out. With some luck, all the damage could be a blown fuse.
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60 amps times12 volts = 720 watts times 80% effic of conv. = 576 watts available for microwave...
You must have a very tiny microwave as most require at least 1000 watts input power. That might have something to do with blowing the fuse. Since the microwave has a very reactive inout, you need a goodly safety margin above the rated watts input.
Without seeing it its a little tuff.
Ok,look at the back side of the inverter,there should be two inputs.One negative- and one postive+.Run the biggest wire you can get to fit in the holes and still lock it down tight,probaly about six gauge wire.
On the hot side +,run the red wire to the battery,but before you connect to the battery,attach a line fuse,Thirty amp should do.Leave fuse out till last step.Run a black six gauge wire to the battery.(You should be able to run the wires through one of the factory rubber grommets on your van,use a stiff wire, or something like a car or cb antenna to attach your wire to the antenna with electrical tape.you may need to cut a **** in the grommet ,so you can push the antenna threw.Be careful not to damage any factory harness wires.)
Secure the inverter to floor of van,make sure the fan can vent well.
Go to battery put in your thirty amp fuse,Then the unit is ready to turn on.Make sure you run your engine while it is powered on,otherwise it wont take long to drain your battery.
are your inverters rated at 60 cycle full sinusoidal wave form or 60 cycle square wave. while both will be tolerated in a transformer, the square wave tends to heat up because it isn't a sine wave. the peaks of a standard sine wave are cut off if observed on an oscilloscope.
I have a background in electronics so i hope i can help. Now after reading this i have the feeling this item does not put out 2000 watts cause if that were the case it should draw somewhere near 147amps. This is because to find out amps you need to take the 2000 watts and divide it by 13.6 volts (assuming what the vehicle runs at) that gives you amps. watts/volts=amps.