[HELP] 3000w Inverter pure sine wave Choice

Discussion in 'Gen 3 Prius Accessories and Modifications' started by BigBear2010, Sep 11, 2016.

  1. BigBear2010

    BigBear2010 Member

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    Long story short, I'm going to be homeless (student cannot afford house rent). I would like to have:

    1. A mini refrigerator (1.7 cu ft)
    2. A small rice cooker (hold 3 cups dry rice)
    3. A small microwaves (0.7 cu ft)
    4. Charging my cell phone and laptop
    From what I have read on priuschat that the 12v battery on prius only good for 1000W, so if I want to power all the things listed above, do I need 3000W inverter? (if not, I still would like to have). The problem is I don't know which one is good and true 3000w, most of them advertised incorrect.

    I saw these on Amazon here and here with good buyers reviews

    Thanks all members :)

    Edit: I will run the power form traction battery for the inverter. Sr, i should make it more clearly from the beginning. I have read somewhere that they use the inverter which physical size just bigger than 1000w and leave it in the car. I wont use the inverter when im not in car, Only when I am in the car and the car is in already mode.
     
    #1 BigBear2010, Sep 11, 2016
    Last edited: Sep 11, 2016
  2. grnd0

    grnd0 Member

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    You need a generator or an auxiliary deep cycle battery setup.
     
  3. Toppcat

    Toppcat Member

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    Generators , inverter use energy to change energy a℅ is lost battery be drained in few hours!
     
  4. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    You need a cord from outside. You are never going to get 3000 watts from your Prius sustainability.
     
  5. ChapmanF

    ChapmanF Senior Member

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    If you look carefully back over your question, you'll spot the problem. :) You have correctly read that you haven't got more than about 1000 watts to play with from the 12 volt system of the Prius. Even that is a stretch: to get 1000 watts, you need to be drawing 1000 ÷ 12 = 83 amps (and that's pretending you have a fictitious, 100% efficient inverter). The fuse link on your car's DC source is rated 125 amps, and keep in mind that size was chosen to power all the stuff that's already part of the car. If you think to draw anywhere near 80 amps of your own from there, you need to be pretty careful to have as much of the car's own equipment turned off (lights, wipers, defoggers, seat heaters, etc.) as you can.

    That should help you see why running a 3000 watt inverter from the 12 volt system of a Prius is just simply out of the question. That would be 250 amps. Even supposing that wasn't double the car's entire 12 volt converter capacity ... just the wire to safely carry 250 amps is thick, unwieldy, and expensive.

    There are people who have set up 3000 watt inverters in the Prius using a different approach. They look for an inverter that runs on 200-240 VDC input instead of 12, and then they wire it directly to the high-voltage system of the car. That is more practical, as the supply wiring only needs to carry 15 amps (3000 ÷ 200) instead of 250, and the car's generator can supply that easily. To find inverters like that, you can look here.

    Other things you need to consider:

    Whether you use a small 12V or a larger 200V inverter, you need to plan for leaving the car READY ON at all times when you are using them. The 12 volt battery in your car only stores about 46 amp hours, so even a 1000 watt inverter at rated load would fully drain that battery in half an hour, if the car were not READY ON to keep it charged. The HV battery is rated about 6.5 amp hours, so a big inverter drawing 15 amps would, again, drain the battery completely in less than half an hour.

    So you need to consider how you'll keep other people from driving your car away any time it is READY ON and you're not there.

    Also, you should look carefully at the physical size of the high capacity inverters on that ConVerdant page. They're big. Most people using them want to supply a house during grid outages, and locate the inverter in the house, with only wires out to the Prius. If you're thinking to store it in the Prius, it will take a big chunk out of your cargo/living space. There's also the weight.

    Then there's installation ... it's more common to take on 12 volt inverter installation as a DIY project. Wiring anything into the high voltage system is best left to somebody with specialist tools and knowledge. In either case, it's not just about avoiding immediate injury while doing the work, but also not creating an ongoing fire hazard. It's just that both are more difficult when working on the HV system.

    And finally there's the price. If you check the prices on those high-capacity inverters you'll see what I mean. If the reason for the project is trouble making rent, then you may need to look very carefully at whether this plan uses your funds effectively.

    -Chap

    Edit: I should add that the list of things you want to run there might actually fit in a 1000 watt budget, if you shop carefully for low-wattage appliances, and if you disconnect the fridge when using any of the other stuff. All those other things only get used briefly when you need them; stuff in a fridge can stay cold that long.
     
    #5 ChapmanF, Sep 11, 2016
    Last edited: Sep 11, 2016
    MM.87, mrbigh and BigBear2010 like this.
  6. bobzchemist

    bobzchemist Active Member

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    Where are you located? Maybe we can figure out a better option than you living in your car?
     
  7. MM.87

    MM.87 Junior Member

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    What will happen if the traction battery got drained out? Can the car be statred?

    Posted via the PriusChat mobile app.
     
  8. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    So long as you are in Ready, and do not run out of gas, the HV battery will be recharged by the engine before it gets too low, so you do not have a problem.

    If you are not in Ready, the HV battery is isolated and can't power anything.
     
  9. MM.87

    MM.87 Junior Member

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    So if I just switch off my car (and forget to switch off my 240VDC inverter) that will shut off the inverter from being working? No harm on HV battery afterwords/start the car as normal? I know this is the opposite with 12VDC inverter as 12V battery will get drained.

    Posted via the PriusChat mobile app.
     
  10. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    Both the positive and negative cables have an isolation relay. If your tap is (wisely) after those relays, all is well. If your connection is before the relays, you could drain the battery.



    From about 1:45 to about 6:05, he discusses the relays, which he calls Contactors. Notice that the cables to the Inverter are AFTER the Contactors and are isolated unless the car is in Ready. That is the obvious place to tap your Inverter as well.
     
    #10 JimboPalmer, Jul 11, 2018
    Last edited: Jul 11, 2018
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