Piano World Home Page Forums Our Most Popular Forums Digital Pianos - Electronic Pianos - Synths & Keyboards 12 volt piano

Is there such a thing?

You can buy a good, high quaity power inverter for $80. These convert 12V to 120 V AC.

Here is one random example that Google found. Just search on "inverter"
Inverter

Be warned that inverters are a big drain of your battery and you need to select a battery that can supply the required power without discharging below about 50% between rechargings

Rule of thumb, that account for losses in the system is to look at how many watts the AC powered device that is plugged into the inverter burns then divide by 10 to see how much current will be drawn from the 12V battery. So say the piano uses 25W of power. It will pull 2.5 amps from the battery.

wow didn't know they were so cheap. thanks for that.

maybe you can see where i'm going with this.
i was dreaming of whether you could run a digital keyboard off a solar panel.

Well some keyboards and DP's run off a separate AC/DC adaptor and maybe can run off batteries.

A keyboard example I know is the Yamaha PSRE 413. It has slots for batteries.

A DP example is perhaps the Roland HP302.

Yes. But you have to do some engineering first.

First buy a good quaality inverter. Figure $100.
Then the first step is to choose a battery size. For solare get one that can supply three days of power without running below 50% discharge.

Then buy solar panels that going buy their rated amps have enough amps to recharge the battery in 8 hours. This will account for all the loss and in-eefescy in the panels and charger. It works out the something like 3X more battery and panel than you think you need but you need it.

What abot lights. How are you planning to read the music? you may need a bigger system because you might plug in more than just a piano. Lights, computer, audio amp,.....?

There are lots of good books out there on 12V systems. Many are written for people living on sailboats. Please do folow all the saftey rules, battery boxes, a fuse inside of the battery box, knowing how to select a wire gauge and so on. 12V can't electrocute you but there is enough energy in a large battery to vaporize a screw driver and the hot metal vapor can do some. damage to body parts.

I'm not sure about any other DP's but you can run the Korg SP-250 off your 12V motor vehicle electrics, this Piano runs off a Mains (240v or 110v) to 12V adaptor.
-

amazing what things people know.

thanks much for all this.

Some info from the KORG website.

Power Supply:
DC 12V (External AC adapter) 3.5A
-