The Rommelsbacher is always connected to the regular mains. Unfortunately, I can't help you there. If the Goal Zero Beti 200X delivers the same power as from a mains socket, what could be wrong with that? Unfortunately, I don't know anything about that. The Rommelsbacher is usually only used for 0.5 to max. 2 minutes. For example, when chopping sesame seeds for sesame paste. So the machine only needs electricity for a short time. Maybe this information will help you to make a better assessment. Best regards Ute