![]() ![]() If you keep wire short the wire size can be smaller, but if the DC input wires are longer then you will need to use thicker copper wires. Verify you are using the correct size copper wires from battery to the Inverter DC INPUT(s). You 12V battery is good, it's large enough a minimum of 75AH and probably much larger is recommended and it's fully charged. LUP indicates battery voltage is low, so firstly make sure: 1. Assuming you have a 12VDC In 120V AC out 3000W inverter. Sometimes it might start but can also damage the invertor. Also try with a low wattage/heating setting on the microwave, tighten the battery terminals of the battery. If the input supply is 24 volts, then it will be more powerful. So the safe limit to operate a microwave is to have an invertor above 2000 watts. In this case your microwave when loaded will initially start up with a large surge current requirement thereby shutting off the invertor as it detects overload. If you load with modest loads of lighting, fan or other low wattage device it will work without tripping off. 17130 Answers SOURCE: When the wattage of an invertor is specified it is meant for the power load but with a gradual CURRENT drain.Just remember, when re-charging them, that they last longer when charged slowly, so don't use a high amp setting on charger and to monitor them closely, and do it in a well ventilated area, away from any ignition sources. ![]() Deep cycle batteries will work better than car batteries. Hook jumper wires positive to positive, negative to negative, on all 12 volt batteries. 6674 Answers SOURCE: Yes, just be sure connections are heavy enough wire, and obviously the inverter uses 12 vdc input. ![]()
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