Comments on: Stored Solar Energy Just Peachy with Georgia’s Suniva, Inc.

By: affiliate millionaire

affiliate millionaire — Fri, 19 Feb 2010 02:12:59 +0000

Just a quick message to thx you 4 your interesting article. Do you know where I could find more on this? x

By: affiliate millionaire

affiliate millionaire — Fri, 19 Feb 2010 02:12:00 +0000

Just a quick message to thx you 4 your interesting article. Do you know where I could find more on this? x

By: HSR0601

HSR0601 — Sun, 31 Jan 2010 18:01:49 +0000

Also, the unique idea of this partnership is that the batteries are also applied to storing the cheapest power from the grid during night, then using it or feeding it back to the grid, curtailing payback time.

By: HSR0601

HSR0601 — Sun, 31 Jan 2010 18:01:00 +0000

By: Brian N

Brian N — Sun, 31 Jan 2010 16:46:09 +0000

You have to think in terms of energy density, life cycle cost, devices v material properties and scalability.

Batteries can do kW/h at some cost relative to kW/h production and flywheels can do tens of kW/h. Scaling these high tech approaches to MW/h farms is not cheap per kW/h and just folly for GW/h.

When you need multi MW/h & GW/h energy storage you need to get away from technology devices and use physical properties of a large abundant medium.

Thermal storage for solar thermal electricity or pumped hydro for any RE. But then you would want new hydro sites within the short possible HVDC link distance to wind farm concentrations ?

U.S. baseload electricity generation is about 440GW with capacity to almost double. For renewables to advance above 10% of that (assuming no HVDC to a really big neighbors grid) you need storage that can charge / discharge at similar 44GW rate with capacity of a day for wind or hrs for solar PV.

Dynamically adjusted grid loads with smart metering / pricing might offset a good portion of storage needs. If every home could dump excess discounted RE into their hot water tank, that would hugely increase the value and capacity factor of RE.

By: Brian N

Brian N — Sun, 31 Jan 2010 16:46:00 +0000

You have to think in terms of energy density, life cycle cost, devices v material properties and scalability.

Batteries can do kW/h at some cost relative to kW/h production and flywheels can do tens of kW/h. Scaling these high tech approaches to MW/h farms is not cheap per kW/h and just folly for GW/h.

When you need multi MW/h & GW/h energy storage you need to get away from technology devices and use physical properties of a large abundant medium.

Thermal storage for solar thermal electricity or pumped hydro for any RE. But then you would want new hydro sites within the short possible HVDC link distance to wind farm concentrations ?