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Old 04-21-2012, 08:59 AM   #1
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1990 Pace arrow Inverter problems

It is designed to run my TV and DVD. It does run the DVD but almost eminently goes to low battery light and turns off as soon as I turn on the TV.. Do I need a bigger inverter? I have new battery's. How can I tell what I need??
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Old 04-21-2012, 11:49 AM   #2
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Hello homeless,

Need a little more info, like brand name/model of inverter, rated wattage, type of installation.

Most inverters should be wired directly into the house batteries, so they have enough amps available to run close to their maximum rated power.

Also if you can find the wattage your TV and DVD use, normally printed on the back of the device or on the power cord.
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Old 04-21-2012, 12:16 PM   #3
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If you are talking about the inverter located in the left compartment over head
it is a 100 watt unit put in to run just what you said. The problem you state is
a very common one for it. I replace mine with a 150 Watt unit as the AC demand
for those two things are very low.
Note this inverter only runs the TV and the player nothing else.
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Old 04-21-2012, 08:19 PM   #4
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I been told that mine is 100 amp. The player will stay on but not the tv too. So I need a bigger inverter? And is 150 enough or should I get as big as I can find?
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Old 04-21-2012, 09:12 PM   #5
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The 150 watt one works without a problem and I just picked up one at radio shack
that old boat anchor is history
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Old 04-22-2012, 02:13 PM   #6
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Ok I got a 350 watt converter from Radio Shack and both tv and dvd runs on it. I know I dont have the watts out put and imputs and other facts about the tv and dvd but in general, how long can I expect two new batteres to keep my tv going???
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Old 04-22-2012, 03:32 PM   #7
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Not knowing the requirements of the TV and DVD it is not possible to fig but
if you required the full 350 watts that draws 29 to 30 amps on your batteries and
they will not last long. But lets say with both on you only draw 130 watts that works
out to about 10 amps from the batteries. Depending on the batteries in use that should last 12 to 18 hrs before the batteries have to be charged back up.
This is what I would expect to see.
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Old 04-23-2012, 05:21 AM   #8
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If I have any understanding of what your asking? My TV uses 55 watts???

http://www.p4c.philips.com/files/2/2...28_pss_aen.pdf
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Old 04-23-2012, 05:50 AM   #9
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At 55 watts you can run for 20 hours before recharge on good batteries.
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Old 04-23-2012, 01:28 PM   #10
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Volts Watts Amps Converter Tool Calculator

The calculator above can calculate your current draw. Your 55 watts at 120V is only .46 amps. Reduce the voltage to 12V and you will pull 4.6 amps (Watts = Amps x Volts). Do it for an hour and you have 4.6 amp hours draw from your battery. Keep in mind that there is some overhead incurred in producing that current - ie the inverter also uses juice. So, all you need do is add up the amps from all your power using items, calculated at your batteries voltage. Multiply by minutes used for each and divide the total by 60. Then compare to the rating for your battery bank. That will show you what you are trying to get your battery to provide in amp hours. You are using a deep cycle batteries arent you?

Also, watch those cheap 100-500w modified sinewave inverters at Radio Shack and Pep Boys. Cheap ones can do serious damage to electronic "toys" because the current is "dirty". They also make cooling fans in those toys run hotter. A much better choice is a Pure sine wave inverter like the Xantrex ProSine boxes. Their output is cleaner than your local power company, by far. Also, if you are using your cigarette lighter plug to supply battery juice, pulling anything more than about 3 amps will likely blow the fuse for that outlet. Additionally, smaller gage wire between your battery and inverter will result in significant voltage loss if your wire run is fairly long. That would also cause a low voltage indication on your inverter despite having fully charged batteries. Look at this calculator to figure your loss due to wire gage and length:

Voltage Drop Calculator

Finally, with most deep cycle batteries never ever take them down to less than 50% (and preferrably not less than 70%) of their rated capacity, before recharging. Unless that is you like buying new batteries.
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Old 04-23-2012, 02:20 PM   #11
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Sounds like one of my students
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Old 04-23-2012, 04:31 PM   #12
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I got DIRTY ELECTRIC!!!

I was told 150 would be all the converter I need so I went to radio shack and got the more expensive 350 watt invert thinking I was covering all bases.. Now I find out radio shack has DIRTY ELECTRIC!!!! What is a power boy to do???
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Old 04-23-2012, 04:39 PM   #13
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Believe me you have a much better inverter now than that factory one they put in.
I do not even repair those old things any more pure junk.
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Old 04-23-2012, 06:16 PM   #14
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Quote:
Originally Posted by homeless View Post
I got DIRTY ELECTRIC!!!
What is a power boy to do???
Inverter FAQ - DonRowe.com - Frequently Asked Questions about Power Inverters

Go to the 5th link down and read, then make your own decision. If you are using high value equipment (computer, stereo, oxygen generator, etc), I'll bet RS will take that "dirty" MSW inverter back and let you upgrade to a "clean" one. RS does in fact sell "clean" pure sine wave inverters. Here is their 650 watt model:

Sunforce 650-Watt Pro Series Pure Sine Wave Inverter : Solar Power | RadioShack.com
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