If you wish to run a toaster on a solar system, you may want to look around for a low power one to keep your inverter size as low as possible.
Big W are currently selling a 700 Watt unit (Abode KT1600G) for $7.95. Our technician Ray tried it out - it drew 31.5 Amps on the DC side of his inverter. It took 2 minutes and 20 seconds on setting 4 (which makes the toast reasonably crisp) for his wholemeal toast. That is about 30 Wh per toasting which is a very modest amount of power.