| I wish to shed some 48 volts DC power
| If I just direct it to a standard 240 volt AC fire
| what happens?
Why did you say "fire"? Freudian slip?
The world is a very big place. In the UK they call a portable heater an
"electric fire".
At 48 V DC you 'd only dissipate, hmm, say 4% of the rated dissipation
of the heater at 240V - which might be too little to be worth doing. A
UK plug is fused at 13 A (someone correct me) which is 3120 W, so at 48
V the same resistance element would dissipate about 125 watts. I don't
know about UK electric fires but over here our portable heaters have AC
motors and fans which of course will not run on 48 V DC.
Bill