Advice on using a Regulated Power Supply?

[druidstone]

Does anyone have the issue with needing to use some kind of regulated power supply?

Some of the venues we play in have just one power point on the stage, which means one power point for the whole band to plug into, with my husbands Mesa Boogie guitar amp turned on, then as soon as our bass player turns on his bass amp, my Nord Keyboards seem to be operating on half power and I cant get anywhere near the required stage volume, even with my mixing desk on full. Even when i hold the keys down on the synth the sound fades out quickly instead of staying for as long as i hold the keys down. Its just impossibe for me to play anything except piano!
In my computer work I can remember some devices needing a "regulated" power supply to ensure consistent voltage.

I cant think of anything else to use but a full computer UPS power backup system which has its own battery.
But I wonder if that would be adequate as they are designed to last no more than 5-10 minutes in the event of a full power blackout.

Is there another electrical "gadget" I can use to ensure continuous voltage to my Nords?

Or should I maybe learn to play the flute for those particular venues LOL

[Mr_-G-]

I think that a volume issue is unlikely to be because of a power issue with the mains. I would guess that the kbd would just not work (it consumes maximum 35W).
If you experience a low volume at the mixing end, have you thought of trying a DI box?
Also being the synth part which is affected and not the piano I wonder if this has anything to do with the expression pedal.

[srcohiba11]

I use a Furman M-8Lx Standard Level Power Conditioning in my rack in which I plug in all my synths as well as my powered monitors and mixer. Haven't had any issues.