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Have you checked the voltage going to the inverter? Sounds like you may have exceeded the load that he inverter can handle but not enough information to confirm that from this end. You mention "plugged into my van battery", possibly you have this plugged into your Cigar Lighter? Mega fuses are usually really high amperage fuses, much more than the inverter could blow and save the inverter. The fuse should be matched to the load and about 50% higher. If the device is rated at 10 amps, a 15 amp fuse will provide protection where a mega with 500 amps will act like no fuse at all to the inverter.
According to the Schumacher 750W power inverter manual it can take two 40 or 50 amp spade type fuses which can be found on ebay with the link below. 40 amp spade type fuses
40 watt , Is a Phillips head screwdriver to unscrew the two screws in the back that are down in those holes and thenOn the opposite side take off the feet with some pliers and there’s screws under there too, Inside you’ll see two red 40 W fuses I believe, I don’t know what the size is called but they are much bigger than the ones under my steering column in my little car, I have the smallest ones they have in the auto parts store, they are more the size between a quarter and a silver dollar but square like car fuses are,
750 watts is pretty close to one HP. However, the pump will have a much higher current draw on start up which may be too high for the inverter. (The accurate number is 745.699872 Watts per Horsepower)
Discounting any losses, 750 watts from a 120 volt supply will draw 6.25 Amps. so 1/2 horsepower should draw 3.125 while running. Startup current may be much more. Check your pump for its current draw (should be printed on the pump) and check it against the inverter's limits. It may be that the inverter is too light for the pump.
http://servicenet.blackanddecker.com/Parts/Search?searchedNumber=750%20Watt%20Power%20Inverter
There are around 8 models of the 750 watt inverter. The above web link takes you to the Black and Decker site where you can input your exact model number and then you can download the instruction manual which has the details for how to change the fuse.
Hi, you need to remove the cover of the unit and inspect the three 40 amp fuses inside. They are the blade type similar to the ones found in automobiles.
Hope this helps
First...you need to find the amperage on the pump...your inverter is rated for 6.25 Amps...(750/120)...you will need an inverter bigger then the pump..I would suggest at least 1.5 times the size of the pump..bear in mind,..the inverter wasnt designed to start motors...so oversizing is needed..
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