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I have a 1500w power inverter that has worked great for abt 2 yrs, I run a dorm size refrig. on it and sometimes a 700w microwave but not both at the same time. The fridge draws abt 180w at startup and abt 70-90w running usually and the microwave abt 960-990w. today I heard the fan running while the fridge was on and looked to see the fridge drawing 220-250w while running, thinking the fridge was messing up I tried the microwave to find it drawing 1.4kw. I checked cleaned and tightened all connectors but still doing the same. Could bad battery cells cause this?

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Not likely as low voltage should shut the inverter down. Check your battery anyway. 13.5vdc fully charged and each cell that is bad is about 2.25vdc off that. Sounds like the inverter has had an internal failure and unless you are an electronics tech, beyond your capabilities to repair without serious training.

Posted on Nov 06, 2012

  • dajeeb
    dajeeb Nov 11, 2012

    That's kind of what I was thinking, but not sure. I've had a couple of batteries in my 4 batt system go bad before and didn't have this kind of problem. Also when I run the microwave for 1.5 minutes I smell ozone coming from the inverter. Thanks for your input, was pretty sure I'd need to buy a new one but didn't want to untill I was sure this one was kaput.

  • Wayne Holden Nov 12, 2012

    Ozone is created when electricity arcs and an inverter should not be working at such high voltages that arcing is easy so must be a high current arc, which is not good. I'm surprised that it even works to run the microwave for that long! Sorry that the answer is going to cost you some bucks but at least they are down in price due to increased consumer use. Just had to buy a small one (600W) and got it on eBay for a fair price compared to what they guy originally paid several years ago so recommend doing some comparison shopping before you make a final purchase. Don't go for the cheapest, but get what you can afford. Good luck!

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Where do all green wires connect to on the honda Eu 1000i inverter?

Posted on Jun 30, 2013

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SOURCE: my 24v 1500w inverter cuts out when i use my 700w microwave?

Normal 0 MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman";} The starts up power for some appliances we use at home are sometimes higher than their actual power. For example a fridge will start with a power of 2 to 3kva then after start up it goes down to its normal power of 700va to 1kva .
Your inverter will continue to switch off if your if you battery is

  1. Low i.e. it is not fully charged
  2. Has a low ampere rating
The solution is to get a battery with a higher ampere rating like 200ampere/hour and above, connect it in parallel to the other battery i.e. the positive terminal to the positive terminal, the negative terminal to the negative terminal. This additional will accommodate the excess power needed for the microwave to start up.

Note that it is not advisable, to use this type of power appliance on a small inverter .Use a battery with the same volt rating i.e. a if you use a 24volts battery get another 24volts battery with a higher ampere rating

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my be overheating the internal parts (TMOS) or you reach the wattage limit. or your using small wire from inverter to battery.

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Normal 0 MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman";} The starts up power for some appliances we use at home are sometimes higher than their actual power. For example a fridge will start with a power of 2 to 3kva then after start up it goes down to its normal power of 700va to 1kva .
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