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Old 08-20-2017, 06:17 AM   #1
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Inverter Question

Mr. D wrote this back to me and this may seem like a stupid question but, what then powers the inverter?

4) 1000 Watt Inverter run to TVs: $735.00. I am not that knowledgable in how inverters work but somewhat know a little. If I don't pick this option, what does it mean? Without on inverter you can't run any 120 volt items unless you are connected to shore power or run the generator. One for just the TV's runs only the TV and maybe some other entertainment center items like a DVD player. We had that with our 2000 DSDP and ungraded to a 2000 watt whole house inverter after a year.
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Old 08-20-2017, 06:41 AM   #2
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Inverter Question

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Originally Posted by jk70 View Post
Mr. D wrote this back to me and this may seem like a stupid question but, what then powers the inverter?



4) 1000 Watt Inverter run to TVs: $735.00. I am not that knowledgable in how inverters work but somewhat know a little. If I don't pick this option, what does it mean? Without on inverter you can't run any 120 volt items unless you are connected to shore power or run the generator. One for just the TV's runs only the TV and maybe some other entertainment center items like a DVD player. We had that with our 2000 DSDP and ungraded to a 2000 watt whole house inverter after a year.


12 volt batteries, the house batteries not the batteries that start the MH
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Old 08-20-2017, 07:25 AM   #3
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Hi JK70 - As stated above the house batteries are the source of power for the inverter. However there are other options for running just a TV when not hooked up to a land line. A small 200 or 300 watt portable inverter would do fine, be much cheaper and when not in use could be disconnected and remove the idle load off the batteries. I don't know what you have for house batteries but don't swamp them with an inverter that will flatten them quickly. Remember there is a drain with it just being there doing nothing.

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Old 08-20-2017, 07:34 AM   #4
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Hi JK70 - As stated above the house batteries are the source of power for the inverter. However there are other options for running just a TV when not hooked up to a land line. A small 200 or 300 watt portable inverter would do fine, be much cheaper and when not in use could be disconnected and remove the idle load off the batteries. I don't know what you have for house batteries but don't swamp them with an inverter that will flatten them quickly. Remember there is a drain with it just being there doing nothing.

Tom


Tom, are you saying that if the inverter is on but no load there is a drain or even off there is a drain? Thanks
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Old 08-20-2017, 07:40 AM   #5
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Tom, are you saying that if the inverter is on but no load there is a drain or even off there is a drain? Thanks
Inverter on but no load still has a small drain.

Inverter off == no drain
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Old 08-20-2017, 07:43 AM   #6
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Thanks Tom, that is what I had thought
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Old 08-20-2017, 07:44 AM   #7
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Hi - Yes, an inverter always drains unless it is off. When at idle (no load) it drains 10 to 20% of rated value. A lot depends on the quality of the design. But an inverter that is not turned off can flatten even a large battery bank in a few days (as many have learned).

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Old 08-20-2017, 07:55 AM   #8
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Hi - Yes, an inverter always drains unless it is off. When at idle (no load) it drains 10 to 20% of rated value. A lot depends on the quality of the design. But an inverter that is not turned off can flatten even a large battery bank in a few days (as many have learned).

Tom
Don't confuse efficiency with idle load. Idle load is normally less than 3% of the inverter rating.
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Old 08-20-2017, 08:16 AM   #9
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an Inverter is powered by the Batteries, usually 6v deep cycle, called your 'House' batteries, as they power things within the RV 'house'.

Some coaches come with 2 batteries, and a smaller 1,000watt or similar sized inverter, usually sized and designed only to power a Residential fridge, especially in newer units. This smaller inverter powers the fridge outlet and only sometimes a TV or optional outlet. Some folks will find the powered outlet and run an extension cord in order to power other items from the inverter, like a TV, fan, cPap machine, etc.
Every coach builder does it slightly different - some install the inverter in a storage bay, or some under/within a kitchen cabinet or near the fridge, hidden.

Some of us have 4 or more House batteries, with much larger inverters that can power all appliances and outlets(not the AC units or elec WaterHtr, tho)... but that's on larger coaches, more often diesel units.

To power a TV, Satellte receiver or DVD player, and a few other items might not take but a smaller inverter, many times easily found at the big box or auto parts stores - you might consider the type that has alligator style clips to attach directly to your house battery bank. Even if its farther from your TV than youd like, add an extension cord to reach.

you'll obviously need to watch your battery charge levels unless you want to discharge your batteries too low - but your generator can handle recharging them as needed, eapecially if you have an AGS(autoGeneratorStarter).
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Old 08-20-2017, 09:07 AM   #10
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Hi Tfryman - You are absolutely right. Idle is +/-3%. Sunday mornings are rough after a certain age. Efficiency loss is 20%. Thanks for the catch.
Tom
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