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Old 07-25-2015, 04:25 PM   #1
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Thumbs up I need an Inverter, help me please!

Hello,

I have two go power 100w panels and a 12 volt deep cycle battery. I need a good inverter that will change my 12v to 110v.

I thought my old converter was capable of that but apparently not. I see the prices range from $150-$3,000+.

I really don't want to spend more than $300 but I need it to be capable to wire up to my entire airstream and not just provide me two 110v outlets on the inverter itself.

Any ideas guys?
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Old 07-25-2015, 04:26 PM   #2
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I think I want a pure sine wave in the 1,000w range...?
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Old 07-25-2015, 05:11 PM   #3
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What you want is not available in the $300 range. It takes special inverters and transfer switches to power any outlet in the Airstream safely. Some things have to be isolated from the inverter in all cases, such as the water heater, the refrigerator, and the AC unit, as well as the converter charger.

What you really need may be different from what you want, and I am not trying to be snarky or funny.

More information on what you are using it for is necessary. You also probably will need more battery capacity than a single battery you indicate you have now.
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Old 07-25-2015, 05:47 PM   #4
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I was just about to say, you are not going to get a pure shine wave inverter in the $1000 watt range of good quality for under $300.

I paid close to $425 for my Samlex 600 watt inverter, model PST-60S-12A - almost everything I have I purchased 12v plugs for. I installed 12v USB outlets for our phones, my router is 12v, the LTE booster is 12v and our laptop's have 12v chargers.

I power our TV, Apple TV and my 19 inch ultra-wide screen monitor with the inverter while working during the day.

So far so good. Wife doesn't use a blow dryer or hair straighten, we don't use a microwave (threw it out) and we make french press coffee, so no coffee maker.
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Old 07-25-2015, 06:15 PM   #5
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Observation: You're not going to get too many hours of 1000 watt power out of a single battery. Like 1 hour. Let's say you could draw 100 Amp-hours out of your battery; that's 1200 Watt-hours, right? So, if you had a really high efficiency inverter, you might get an hour out of it.

Solar panels are usually good for 5 equivalent full sun hours a day, so your 1000 Watt-hours would just about equal the typical daily output of your panels.

Question: Do you need pure sine wave power for all your 120V applications? Would it be possible to use a cheaper modified sine wave inverter for some uses and a smaller pure sine wave inverter for others?
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Old 07-25-2015, 07:49 PM   #6
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I have this inverter.

http://www.amazon.com/MorningStar-SI.../dp/B002MW6PLW

It's about $300 and it's pure sine. It is 300 watts all day and 600 watts for 15 minutes. Practically speaking, this is about all the two 12 volt batteries on our Airatreams can deal with without damage. With this inverter you'll have to figure out a way to wire into outlets. I did wire into all my outlets in a way that switches between street and the inverter, but it wasn't a trivial project.

For the most part I use the inverter to charge tablets, phones, the TV, vacuum, and small kitchen appliances. Never wished for more power.
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Old 07-25-2015, 07:57 PM   #7
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I'm staying out of this one!
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Old 07-25-2015, 08:02 PM   #8
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I'm staying out of this one!
What Lewster? You're not going to pull a rabbit out of your hat and give him what he wants for the price he wants to pay??

You get what you pay for, and $300 isn't going to get you much.

Cheers
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Old 07-25-2015, 08:11 PM   #9
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Don't forget the fridge on auto will try to switch to 120vac by itself, uses several hundred watts so if you're not thinking about it, it will suck the battery down quickly.
You don't want to discharge a battery below 50% on a regular basis, unless you want to buy new ones frequently.
One battery won't get you far on a big inverter lots of draw. Remember for every 1 amp of 120vac you are using a little more than 10 amps 12vdc. It adds up quickly, even with 200w solar.
If you think it all out and make sure you turn off any big loads you could wire an extension cord with 2 male ends, plug one into the inverter, one into an outlet. This would work up to 15 amps. Unless you have reverse power protected circuit breakers, which you won't, the electricity doesn't care where it comes from and flows to.
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Old 07-25-2015, 08:14 PM   #10
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Ha, Lewster. LOL. I will share that I just replaced my inverter that BURNED UP and was rarely used. Nothing overloaded, not even being used at the time. I went with a GoPower Pure Sine this time. The previous was Xantrex. Lewster says, Chinese junk, I hear him but here is a question. Who makes a pure sine unit with outlets on the unit and not hardwired into the trailer requiring a wiring job? I found no one even Magnum. I called them. So, those of us who just want a bit of power with smaller needs have Shanghai door #1 or Peking door #2 to choose from. BTW a 1000 watt Xantrex Pure Sine is about $300. A Go Power 1000 watt is $423. Check out their websites.

I purchased a 1500watt model just to be able to add my coffee maker to the fray when needed for short bursts. Everything else is much less power. It still provides a 600 watt ceiling when it is used so I am good to go. Note the continuous wattage rating when you shop and the high voltage cutoff. I understand it is better the higher the voltage with solar.
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Old 07-25-2015, 08:22 PM   #11
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I need an Inverter, help me please!

I have used a modified sine wave inverter to power my entire trailer for over two years now, I haven't blown anything up any appliances, electronics, or fixtures yet...

Of course my trailer is kind of rudimentary, but my furnace and water heater do use computers.
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Old 07-25-2015, 08:39 PM   #12
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Here's a 300 watt pure sine that I've seen hoot write ups on
http://www.amazon.com/MorningStar-SI.../dp/B002MW6PLW
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Old 07-25-2015, 08:40 PM   #13
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Good write ups on
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Old 07-25-2015, 09:39 PM   #14
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Made in USA I might add!!! An excellent unit if you can get by with 300 watts.
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