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Post by Deleted on Jan 13, 2017 9:41:34 GMT
My Ring 120w inverter still seems up to the job but I noticed that it struggles to perform due to voltage drop due of the 12v supply wire along the length of the boat. At least that's what I thought was the main problem!
I've since discovered that the 12v cigarette adaptor I was plugging it into (which I had modified with a 12v plug which plugs into my 12v circuit) was the weak link. I thought it was rated at just enough Amps to handle the TV but obviously not.
I have now modified the inverter and fitted the plug to that so I could disregard the use of the cigarette adaptor. Don't know why I didn't do this in the first place. Everything seems fine now and there is much less of a voltage drop.
Anyway, it's still not ideal. I will at some point put an inverter near the batteries so I can switch between that or the generator and use the 240v sockets instead.
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Post by Telemachus on Jan 13, 2017 10:29:20 GMT
Yes it is much better to have the inverter near the batteries, and a long mains cable to where you need the power, rather than vice versa.
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Post by tonyqj on Jan 13, 2017 10:41:41 GMT
To explain Nick's post, let's say you wish to power a 75W appliance. At 12V that's 6.25A. At 230V that's 0.33A. Voltage drop is directly proportional to current, so given the same size wire in each of the above scenarios if you'd drop 10% at 12V you'd only drop 0.5% at 230V.
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Post by Telemachus on Jan 13, 2017 10:50:53 GMT
To explain Nick's post, let's say you wish to power a 75W appliance. At 12V that's 6.25A. At 230V that's 0.33A. Voltage drop is directly proportional to current, so given the same size wire in each of the above scenarios if you'd drop 10% at 12V you'd only drop 0.5% at 230V. Yes or to put it another way, you need ~20 times the wire size to get the same % voltage drop at 12v as you would at 230v.
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Post by tomten on Jan 13, 2017 19:42:52 GMT
To expand on the above:
The op's system may now be working again, but will still be subject to voltage drop... Result of this is that you will be using more power from your batteries.
Switch around the inverter to near the batteries and you will save power.
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