Re: [toyota-prius] $20 per gallon in NYC-Craigs list
- On 11/13/2012 8:55 AM, David Kelly wrote:
> Should't be surprised an 80W inverter draws more than 80W as all II didn't put an ammeter on the 12V side of the 80W inverter I used (I
> have seen get hot and have a small fan inside.
was more interested in getting my boiler running), and my average load
was about 50W as shown on a Kill A Watt meter, but the inverter didn't
get hot at all.
At some point I'll measure input versus output power; I wouldn't be
surprised at 20% loss or more.
- On Nov 13, 2012, at 6:19 AM, Walter Lee wrote:
> David,I think you are trying to over think it.
> I'd really am interested in this scenario and what my options are.
> I messed up last time - I don't want to mess up twice. (9_9)Can you confirm whether I am getting the basics correctly. (9_9)
> The Peter's reasoning goes as follows: the power loss from the input circuityr (fuse) to the actual power adapter is 30W ( 150w-120w) or 20% power loss in the adapter circuitry.
If the inverter can really put out 80W (most are sold by liars) then we know the input draw must be at least 80W. The Prius outlet is rated 120W. There is a conversion loss somewhere in your 80W inverter. So we say that an 80W inverter is about the limit of what one can safely use on a 120W supply. Perhaps you could get by with a 100W unit.
Truth be told 119W isn't going to be safe when 121W is a sure kill. These things are not that predictable. Gut feel from experience says 80W should be safe, 100W might be safe, and 120W rated inverter is certainly not safe at its full capacity because it will be drawing more than 120W.
David Kelly N4HHE, dkelly@...
Whom computers would destroy, they must first drive mad.