One thing to watch out for if you use a generator some do not give a nice clean AC and are not good for electronics...Honda is super and pretty quiet, you might be able to set it a ways away from the board and get by on the noise....of course it would have to be outside.

One other option in an inverter setup, using a large deep cycle Marine battery. Use a small cart to setup the power station, inverter and battery. Quiet, and would last a while....

Paul I agree with what Leeboy is saying.
Gas generators are noisy and outdoors only.
Some keyboards can accept 9V or 12V DC directly from a battery. Most (i.e., recent Yamahas) require more than 12V, which means you'll need to plug them into a battery-powered "inverter" or UPS that simulates a wall socket. I'll guess that a big, heavy ($200) UPS will run a keyboard for 45 mins to an hour on that setup. Edit: I think the device in your link is a good choice, and a good value for the price. But I personally wouldn't bother with the solar generator. Of course you'll need your battery-powered amplifiers too.

No battery-powered keyboard will compare to a pro arranger. The Casio CT-X3000 has a pretty complete feature set. But navigation is awful with its tiny LCD display, and the keybed is junky. On any of them, the speakers won't be very loud. Which takes us back to the inverter setup.

It can be done but you would probably need a cart, because you'll be hauling some heavy gear. My $.02.

The easiest and most efficient way to do this is to use a deep-cycle marine battery and a pure sine-wave DC/AC inverter, which can be purchased for under $150 online. Most other power systems are square wave, which tend to produce a fair amount of 60 hz hum.

The marine battery will last about 7 years if kept charged with an inexpensive trickle charger and the battery will cost you about $150 on average.
total outlay for a solid system will be about $300. That battery will be heavy, though, about 55 pounds.


Gary

How 'bout this?
https://smile.amazon.com/Jackery-Portable-Power-Station-Generator/dp/B07D29QNMJ/ref=sr_1_2_sspa?crid=1H1C14UV885CH&keywords=portable+power+station&qid=1580841528&sprefix=portable+power%2Caps%2C141&sr=8-2-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzTDBOUjBNUUJHR0paJmVuY3J5cHRlZElkPUEwMjQ3NDM1M1Q4WE5PNDFQREYxTSZlbmNyeXB0ZWRBZElkPUEwNDAzOTE4M09EVlRCTTVLSkpFWSZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

I have a 4500 watt power inverter. Bought it over 20 years ago, for about $300. I always carry it with me, in my van, truck , or car... whatever I own.

I have always had some kind of power on my vehicles (for power tools etc).

I use to rewire alternators and have 110 volts.. Did that for thirty years. You had to run your engine, where the inverter draws direct from battery. I have used the inverter to power up gear for several hours without a major draw on the battery.. Warning gauge will let you know if you are low on power.

BTW: for light power usage check out Ryobi inverter , uses standard 18v battery.. it has 1 or 2 outlets and quick swap of batteries when needed. ($100).

One of the amazon reviews is from an arranger keyboardist, using this portable power supply for his keyboards, amp, and a TC Helicon Harmony M. There's picture of his set up. Seems like a good solution for any event where power may be an issue.

https://www.amazon.com/Portable-FlashFish-Generator-Adventure-Emergency/dp/B07T48L6CF/ref=sxin_2_ac_d_pm?ac_md=1-0-VW5kZXIgJDIwMA%3D%3D-ac_d_p

Anyone tried this one? I bought the Ravpower initially for my beach amp (Crate and KC-110). They work great and the charge lasts forever. In this video, the guy claims he has played his 88-key Casio for 5 hours and he also ran a tablet out of the same battery.

This battery comes with a plethora of connectors. I have used it to power my KC-110, Crate, and several of my Ham radio transceivers. I recommended this to another beach musician (guitar player/singer) and he said it is the greatest thing since sliced bread - he powers his KC-110's with it. Anyway, another possibility as I see a lot of the Yammies are running on 12V power.

Thanks saxman. I’ll for sure look into that. That looks much batter than logging some big old car or boat battery !

Paul, look at the specs - they only put out up to 1,000 mah, which would not power a keyboard for very long - a few minutes at most.

Gary

Here is the model I bought - Ravpower PB14. I have used it many times with my KC-110 and have powered my ham transceivers using it as well. It is an amazing battery. My friend the guitar man says he loves this battery for the length of time he can run his KC-110's on it. Here is the RP-PB14 and KC-110 discussion: