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  1. #1
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    Default Yet another inversor question

    I have just got my first inversor! It worked fine for 3 weeks and then kept breaking down. Just turning itself off. The electrician kept coming to fix it and said:

    1. The voltage coming in was too high, so changed the wiring outside to a lower voltage.

    2. The voltage coming in was too low, so changed back to the higher voltage.

    3. The shower (one of those which heats up in the shower head) was too powerful so disconnected from inversor, so only works on street power.

    4. The fridge was too powerful so disconnected from inversor too.

    Anyway none of this worked so now the inversor has gone away for repair and he has lent me a small 1.5KW one.

    This one goes into overload when you use the iron (the electrician says never use iron with inversor), the water cooler (now disconnected) and struggles even with the coffee maker.

    OK, so I decide to educate myself and learn about watts! So as far as I can work it out, I can use things up to 1,500 watts and all should be fine. The water heater is 650, the iron 1200 so that won't work. No idea about the coffee maker. But surely if the water cooler is 650 I should be able to use that with just light bulbs and computer? But if cooler is on, the inversor makes a funny noise and the lights go up and down.

    And the one being repaired is 3000 so why can I not iron with that one? I know that there are spikes when you turn things on, but how high are the spikes?

    Help.

    Matilda

  2. #2
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    Quote Originally Posted by Matilda View Post
    I have just got my first inversor! It worked fine for 3 weeks and then kept breaking down. Just turning itself off. The electrician kept coming to fix it and said:

    1. The voltage coming in was too high, so changed the wiring outside to a lower voltage.

    2. The voltage coming in was too low, so changed back to the higher voltage.

    3. The shower (one of those which heats up in the shower head) was too powerful so disconnected from inversor, so only works on street power.

    4. The fridge was too powerful so disconnected from inversor too.

    Anyway none of this worked so now the inversor has gone away for repair and he has lent me a small 1.5KW one.

    This one goes into overload when you use the iron (the electrician says never use iron with inversor), the water cooler (now disconnected) and struggles even with the coffee maker.

    OK, so I decide to educate myself and learn about watts! So as far as I can work it out, I can use things up to 1,500 watts and all should be fine. The water heater is 650, the iron 1200 so that won't work. No idea about the coffee maker. But surely if the water cooler is 650 I should be able to use that with just light bulbs and computer? But if cooler is on, the inversor makes a funny noise and the lights go up and down.

    And the one being repaired is 3000 so why can I not iron with that one? I know that there are spikes when you turn things on, but how high are the spikes?

    Help.

    Matilda
    Oh boy, you have so much to learn. I don't even know where to start from. 3k to fix it? Oh nooo. If its a dominican inverter then he is over charging you.
    First of all, if he connected the whole house with the inverter, including shower heater etc, then he is an idiot. He doesn't know what he is doing. Think of inverter as emergency power source: use it only for low wattage light bulbs, pc, radio, TV and fans. Nothing else. No water heater, no iron, no fridge if you don't have sufficient wattage rating (3.5kw) and 8 batteries, no blow dryer and no washing machine and dryer. The electric toaster and microwave would also have to be out of the inverter circuit.
    These things would have to be out of the circuit. I have all the heavy items out of the circuit so my inverter never breaks down. Its a dominican brand and I always have lights even with 2 batteries.

  3. #3
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    Quote Originally Posted by AZB View Post
    Oh boy, you have so much to learn. I don't even know where to start from. 3k to fix it? Oh nooo. If its a dominican inverter then he is over charging you.
    First of all, if he connected the whole house with the inverter, including shower heater etc, then he is an idiot. He doesn't know what he is doing. Think of inverter as emergency power source: use it only for low wattage light bulbs, pc, radio, TV and fans. Nothing else. No water heater, no iron, no fridge if you don't have sufficient wattage rating (3.5kw) and 8 batteries, no blow dryer and no washing machine and dryer. The electric toaster and microwave would also have to be out of the inverter circuit.
    These things would have to be out of the circuit. I have all the heavy items out of the circuit so my inverter never breaks down. Its a dominican brand and I always have lights even with 2 batteries.
    Errrrrr, I think you misread Matilda's post.... she didn't mention cost of repair the 3000 relates to the kw of the inverter as I read it!

  4. #4
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    What is the wattage of the invertor? 1.5k? 2.4k? 3.5k?

    Is it a 12 or 24 volt invertor?

    What is the condition of the batteries? New? Old? How many do you have?

    I have everything but a/c, water pump (both 220v), water heater and washer/dryer on my 3.5kw/24v/4 battery invertor/ with ~zero~ problems. This includes microwave, fridge and water cooler. In normal useage, we get 7-9 hours from the system.

    I suspect you have a number of electrical Germlins in your house electrical system, the invertor was incorrectly installed/set up, and it's trying to run too many electrical appliances...

  5. #5
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    Thanks wb yes mine is 3K watts not 3k to fix it.

    Yes I realise I have a lot to learn re inversors and am trying to learn hence this post. Thanks Windeguy - have now checked out calculating the power budget, and now know that the spikes are 3 to 4 times the wattage - which is massive. I have 12 batteries, so that should be OK. Is there any little gismo which can show how many watts are going through inversor so I can know whether or not can put washing machine on or whatever? Or do I have to either just use for lights and PC and fan and TV, as AZB says, or wander around with a calculator?

    Matilda

  6. #6
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    a button pops out of the side of our inverter when the microwave and vaccuum cleaner are on at the same time- is there a button on the side right hand side of yours by any chance

    our washing machine is on another circuit so it cant be used when the power is off

  7. #7
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    Quote Originally Posted by cobraboy View Post
    What is the wattage of the invertor? 1.5k? 2.4k? 3.5k?

    I think 3k or 3.5K but as is at repairers cannot check

    Is it a 12 or 24 volt invertor?

    No idea as at repairers

    What is the condition of the batteries? New? Old? How many do you have?

    New, 12.

    I have everything but a/c, water pump (both 220v), water heater and washer/dryer on my 3.5kw/24v/4 battery invertor/ with ~zero~ problems. This includes microwave, fridge and water cooler. In normal useage, we get 7-9 hours from the system.

    I suspect you have a number of electrical Germlins in your house electrical system, the invertor was incorrectly installed/set up, and it's trying to run too many electrical appliances..

    Very probably, very probably and very probably lol
    .
    But how come you can run microwave and fridge and water cooler, when other people say you must never do that??


    matilda

  8. #8
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    Quote Originally Posted by Matilda View Post
    Thanks wb yes mine is 3K watts not 3k to fix it.

    Yes I realise I have a lot to learn re inversors and am trying to learn hence this post. Thanks Windeguy - have now checked out calculating the power budget, and now know that the spikes are 3 to 4 times the wattage - which is massive. I have 12 batteries, so that should be OK. Is there any little gismo which can show how many watts are going through inversor so I can know whether or not can put washing machine on or whatever? Or do I have to either just use for lights and PC and fan and TV, as AZB says, or wander around with a calculator?

    Matilda
    Each appliance should have a label that shows the amperage draw. Use that to calculate the wattage, since W=A*V.

    An appliance may say it's 10 amps, but the initial spike (especially for electric motors) may be 3 times that.

    If you have 12 batteries, you have a 12 volt system, since it's arrayed in lots of 2x6v batteries. A 24v system has 4, 8, 16, etc. batteries. The higher the voltage system (6->12->24->48, etc.) the overall more powerful and efficient the system.

  9. #9
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    Quote Originally Posted by Matilda View Post
    But how come you can run microwave and fridge and water cooler, when other people say you must never do that??


    matilda
    I don't know why they say it. It shouldn't be any problem at all if your invertor is rated high enough and you have sufficient battery capacity...and with 12 batteries and 3kw you should. We have a 3.5k invertor. My microwave is 1200w. No problem.

  10. #10
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    Quote Originally Posted by jrhartley View Post
    a button pops out of the side of our inverter when the microwave and vaccuum cleaner are on at the same time- is there a button on the side right hand side of yours by any chance

    our washing machine is on another circuit so it cant be used when the power is off

    No button on right hand side, but button on front which goes red. Used to be able to push it back in, but then that didnt work either - hence repair.

    Matilda

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