Can use Skybox + Bat for Demand Response, Grid Sell

Discussion about OutBack Inverters in Grid Tie Applications

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ysp
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Can use Skybox + Bat for Demand Response, Grid Sell

Post by ysp »

We are looking into using Outback Skybox & Batteries for a Demand Response setup. When the utility requests I need to discharge the batteries and sell excess power to the grid until the batteries are delepeted. This setup is mostly battery and probably no solar, so the Battery will charge at night when not needed.

Basically, I need to be able to change the setting on Skybox via remote (Optics Re) and force the Skybox to output a full 5kW of power until the batteries hit a low voltage state.

Haven't really used Outback product much and never tried Skybox before, but the price point is pretty good for the Skybox. Just need to verify we actually force it to discharge batteries to sell back to Grid instead of just powering local loads.

Thanks
Mike Curran
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My RE system: Outback - Garage roof:
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Re: Can use Skybox + Bat for Demand Response, Grid Sell

Post by Mike Curran »

Just from perusing the manual, I don't think a Skybox can do what you're looking for. Take a look yourself (p. 25-31 especially), maybe you'll see something I missed. https://outbackpower.com/downloads/docu ... rg_web.pdf
https://smart.tigoenergy.com/p/pZXn7SZQyO45?date=2021-04-19
https://enlighten.enphaseenergy.com/public/systems/Hctc107221
ysp
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Re: Can use Skybox + Bat for Demand Response, Grid Sell

Post by ysp »

I see a sell limit (0 to 5) kw and a lot of wording about selling. So I would assume the Skybox can sell back.

Just question on what settings to use to sell back using battery power.
raysun
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Re: Can use Skybox + Bat for Demand Response, Grid Sell

Post by raysun »

I'm not a Skybox user so can't answer past what I've read in the documents and on this forum.

I don't quite understand how Demand Response would work in the scenario of the original post. Is the power company asking you to backfeed to the grid, at the same time loads on the same side of the meter as the Skybox being serviced? Is the Skybox supposed to provide power to local loads AND the grid?

Most of the definitions of Demand Response power I've read refer to curtailing Grid use when requested by the utility, and providing local supply. The Skybox certainly can do that.

Looking through the aforementioned literature, I don't see any examples of a Skybox selling from the battery. It will sell excess PV power, but that's not in your system design.
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