why not just buy a jackery 300 or 500 powerstation and play your normal keyboard and amp into it and play anything anywhere for from $300 to $500 dallars for a pure sine wave setup. I can get 10 hours with my korg pa1000 plus a bose l1 compact amd have power left over.
MEL
Hi Mel
Seeing what you can do with the Jackery, I wonder if my Flashfish would handle the Pa4x and one Bose L1 compact. I will see how the numbers stack up.
Bernie
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pa4X 76 ,SX900, Hammond SK1, Ketron SD40,Ketron Event X Centerpoint Space Station, Bose compact