If 500watt is what your solar panel can provide it will be stupid to use 500watt machine on it because
1. Sun isn't going to be stable, there will be fluctuations.
2. You will need to recharge your backup batteries.
A 500W solar setup is for a 250watt load max, if your mining machine is going to use 500watt go with a 1000watt solar setup..
the panel will be 10.000kWat
i calculated that i will have about 500w per hour annually that i can spend so i decided to run a miner
Ok then go for it.