Inverter to power 240v speaker

Hi,

1600W, its a lot and the spec doesn't say what that means other than its output (e.g. RMS power).
The amplifier won't be 100% efficience so the power input required will be more than the output.

Lets say for sake of an example that the amplifier does require 1600W maximum load on mains 230V.

A good inverter, and you will need a good one with a "pure sine wave" output to drive audio equipment will be about 90% efficient.
So that's a maximum of 1778W input on 12V.

To get 1778W out of 12V you will need 148A. Petrol A2's have a 90A alternator and I think the TDIs have 120-130A.

Actual average load will be a lot less unless you are playing a continuous sound (e.g. music) at very high volume, but that's a lot of power to take out of the car's electrics!

regards

Andrew
 
That’s pretty much the equivalent of running an electric 2kw fire off of your car electrics. It can theoretically be done and, as mentioned above, that shouldn’t be continuous load, but the campervan forums all seem to be dead against that kind of load.

Peukert effect (possibly misspelt there) will reduce your actual battery output by perhaps half so assume only 40A of spillover onto your battery (beyond what your alternator provides) - it’s going to maybe be an 80ah battery so You would run it dry in maybe an hour of peak load... if it’s not a deep cycle battery it won’t be good for it to run under 50% either.

Maybe try running it in the house on 240v and monitor how much draw there is listening to your fave music for a while and see what the actual demand is like.


Sent from my iPhone using Tapatalk
 
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