1800 watt Inverter

Submitted: Thursday, Jan 24, 2013 at 00:34
ThreadID: 128500 Views:5234 Replies:6 FollowUps:2
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Can anybody out there give me some idea how much power draw an 1800 watt inverter uses at idle , that is powering itself.
The reason for the question is that I am considering purchasing a vast receiver and am wondering
If a 12/24 volt system would be better than 240 volt run through the inverter.
I would appreciate any input I can get.
Regards John
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Reply By: The Hob - Thursday, Jan 24, 2013 at 19:35

Thursday, Jan 24, 2013 at 19:35
I would have thought a 12V system is better as otherwise you will generate 240V from the inverter and then the Vast would have to take it back to 12 or 5 volts anyway.

Unfortunately, I will have the same problem as my system is the old one as I have not upgraded to VAST yet!!!

AnswerID: 585271

Reply By: MEG & Capt Norty - Thursday, Jan 24, 2013 at 22:03

Thursday, Jan 24, 2013 at 22:03
We have VAST run through the inverter. It hardly pulls any power, so Capt Norty says.
BUT if he ws buying anew VAST, he would probably buy a 12v.
Margaret & Norton

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AnswerID: 585272

Reply By: Fred & Marj - Friday, Jan 25, 2013 at 03:02

Friday, Jan 25, 2013 at 03:02

I would go 12v anytime - you will use less power that way every little bit counts especially when watching TV for a few hours,


Helen & Wayne

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Reply By: Deleted User - Friday, Jan 25, 2013 at 03:29

Friday, Jan 25, 2013 at 03:29
The VAST receiver is 240v only as produced by the manufacturer. The 12v jobs seen for sale are modified by various sellers who fit an internal power supply to work from 12v.
I would think this would make the warranty null and void.......ask.

The 12 Vast receivers will work the most effiently in terms of energy wasted in the conversion process.

With inverters they are most efficient at near 75% load capacity. So using a 1500w inverter to supply a 20w load is most inefficient.

I have two inverters on board. One is a 300w pure sine wave which I use most of the time and the other is a 1000w pure sine wave which I only use to bake a loaf of bread when the solar panels are working hard. Both of these are permanently wired in with automatic changeover.

As for buying prices you can get a 1000w PSW inverter for $120 delivered and a 300w for $90. All YumCha brands but I cannot fault them.

Had about 300mm rain here overnight and today.....might need to be trotting out the ark by the look of it. We are near Yeppoon Qld.

Been sitting at the puter all day trying to see what mischief I can get into.....ha

AnswerID: 585274

Reply By: Toga The Mist - Friday, Jan 25, 2013 at 03:30

Friday, Jan 25, 2013 at 03:30
To all who responded , thank you, it would appear that 12 volt appears to be the most economical as we bush camp mostly.
Sound in motion can change the power board in the vast to incorporate 12v and not have the need to run through inverter.
Safe Travelling

AnswerID: 585275

Follow Up By: NIK `N` OFF - Friday, Jan 25, 2013 at 04:36

Friday, Jan 25, 2013 at 04:36
We have a Vast converted to 12v by SIM

It has been trouble free BUT and it's a small but ...... it has a fan inside that is not exactly whisper quiet. We resort to manually turning it off at night, using the remote just puts it into standby and the fan still runs.

I do not know if the 240v Vast have the same fan or it's been added by SIM

Mick & Vickie


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Reply By: Frank Aus - Friday, Jan 25, 2013 at 05:57

Friday, Jan 25, 2013 at 05:57
Hi, The Vast units converted to 12 volts have an elcheapo inverter in them, so that in effect you are still using an inverter, Far better to use the low power 1800 inverter.

I am not sure about the units that Sim sell,
but some of the Vast boxs I have seen converted, use this inverter, http://www.ebay.com.au/itm/12V-DC-to-240V-AC-150w-Power-Inverter-Car-USB-Laptop-/200595351407?,
they remove the outer cover and move some componets inside and install inside the vast box. This is definately not the same as buying something that was built and designed to run on 12volts (like the strong sat boxs etc.)

AnswerID: 585276

Follow Up By: Toyman - Friday, Jan 25, 2013 at 21:01

Friday, Jan 25, 2013 at 21:01
For anyone wishing to do it the correct way, these mount inside the Vast Box.
Would assume SIM do similar.

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