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Old 02-06-2015, 02:16 PM   #1
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Affordable Pure Sine Inverter?

Is there such as thing as an affordable pure sine inverter?

I'm looking for an inverter to use with a 200 watt, 2 6v battery system. Eventually I'll upgrade it to 400 watts and 4 6v batteries.

Since money is a consideration, I need something affordable.

I don't use much energy. A couple of lights, water pump, propane fridge/water heater. For AC I need to make a pot of coffee in the morning, perhaps 10 minutes of use of the microwave, iPhone/iPad charging and occasionally, 3 hours of TV.

It would be nice that there was an easy way to hook it up and turn it on and off when needed/not needed.

Thanks
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Old 02-06-2015, 02:44 PM   #2
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Just sent you a PM.
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Old 02-06-2015, 04:41 PM   #3
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I have a Cotek 1000W PSW that I run off 2 6-Volt batteries and it has worked excellent since my install one year ago. Total cost of parts was less than $400 and I did my own install.
COTEK


I have these SK1000 and CR6:
COTEK
http://www.cotek.com.tw/upload/Image/CR6_L.jpg
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Old 02-06-2015, 05:15 PM   #4
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Quote:
Originally Posted by barney_g View Post
I don't use much energy. A couple of lights, water pump, propane fridge/water heater. For AC I need to make a pot of coffee in the morning, perhaps 10 minutes of use of the microwave, iPhone/iPad charging and occasionally, 3 hours of TV.

How many watts is the coffee maker? How many watts does the microwave use? Will you use the microwave and coffee maker at the same time?

I'm thinking at least 1500 watts for each of your appliances..... You probably need at least a 2000 watt inverter. If you want to use both at the same time 4000 would be needed.
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Old 02-06-2015, 05:24 PM   #5
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Here are two choices. A cheap Chinese unit - which is a gamble how long it will last....and the Magnum - one of the best and most reliable.


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Old 02-06-2015, 05:48 PM   #6
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I found one that would qualify as a middle ground between the other two I presented. Not super cheap, and not super expensive either. Should be a quality unit.


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Old 02-06-2015, 09:03 PM   #7
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I have had good luck with the Xantrex Prowatt SW2000. If you shop around you can find it under $400. Don't try to use the coffee maker and microwave at the same time
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Old 02-07-2015, 06:53 AM   #8
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Been using the Pro Watt SW 2000 for 5 years, full time, on the boat. First 2 failed after 8 months, each. Xantrex said some early ones were bad and replaced them.


The one I have now has been fine for 3 1/2 years.


We can use the microwave, but if the fridge starts up, with the microwave, the inverter shuts down. We just switch off the fridge before microwaving. If the fridge is running, we don't have a problem.


I have a Pro Watt SW 1000 in the M/H for TV, laptop and coffee maker. I start the generator for microwave.


I had a cheap 2500 watt pure sinewave inverter that would surge and blow out power strips, when we turned on the microwave. When I say blow out, I mean they would start smoking and I would throw them overboard. It happened 3 times, before I swapped it for the Xantrex.
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Old 02-07-2015, 07:09 AM   #9
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If it were me, I would NOT run the coffee maker or the microwave using the Inverter. Way too hard on the batteries with the setup that you are proposing.

When dry camping I always use the generator for those two devices.

However, it's your coach, your choice, do as you want.

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Old 02-07-2015, 07:50 AM   #10
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My 4 cup drip coffee maker uses 700 watts for 4 minutes, equaling about 7 amp hours to make coffee.

2, 6 volt batteries will give you about 100 usable amp hours.

My small microwave draws over 1000 watts running, but again, not for more then 5 minutes at a time. Thats about 9 amp hours.

Just sharing info
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Old 02-07-2015, 08:04 AM   #11
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We routinely use the microwave from inverter/batteries. Lunch stops on the road, breakfast, etc.
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Old 02-07-2015, 08:18 AM   #12
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If I could not run the microwave for reheats anywhere, any time, I would be RV'ing by myself. That was one of the conditions SWMBO set when I was putting in the solar system. And, I had to have a useable coffee pot. A 2000 watt Morning Star inverter and 4 T105 batteries allow me to do that and use the other necessary 120 volt items--TV and computers. Design the solar system for your needs.
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Old 02-07-2015, 09:12 AM   #13
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I have a Nature Power 2000, 2000-watt Pure Sine Wave Inverter with 55-Amp Charger connected to 6 six-volt batteries and have been happy with it since I installed it over a year ago.

http://www.amazon.com/Nature-Power-S...verter+charger
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Old 02-07-2015, 09:50 AM   #14
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Quote:
Originally Posted by RoamingGnome View Post
I have a Nature Power 2000, 2000-watt Pure Sine Wave Inverter with 55-Amp Charger connected to 6 six-volt batteries and have been happy with it since I installed it over a year ago.

Amazon.com: Nature Power Sinewave 2000 Charger with Inverter - 2,000 Watt, 55 Amp: Home Improvement
That looks like a good inverter for an RV. Would be a simple install with the included transfer switch. I couldn't find the capacity of the transfer switch, but it is probably 30 amps. The hard wire feature is a real plus. It has a three stage 55 amp charger.
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