The battery powered Roland AC33 amp looks to be very useful for playing outdoors and, as I am very impressed with the mains operated AC60 which I own, I am considering its purchase. I am slightly put off by the fact that it only operates with a power of 2x10w with batteries when its headline description states 2x15w (slightly misleading advertising methinks).

As my outdoor use is likely to be on the canal towpath next to a boat (with 12v power) could I use the mains model (AC60) SAFELY through an inverter and would I be better off with a pure sine wave model (expensive) rather than a cheaper quasi sine wave one. I have a friend who 'fried' a couple of TVs and this was put down to the cheaper inverter. I don't want to take any chances of damaging the amp.

Can anyone technological allay my inverter fears or would I be better off opting for the battery powered AC33?

Comments please.