Renewables have now come of age and are transforming the energy sector. Electricity generated by both solar and wind is now growing at a record pace. In 2015 alone, a record 59GW of solar PV and 63GW of windpower was installed worldwide.
Today’s electric grid is being constantly balanced between energy supply and demand. Solar and wind-generated power are inherently variable and intermittent, and they are experiencing rapid growth. As the percentage of renewable power to fossil fuel power increases on the grid, the ability to manage and stabilize the grid deteriorates and at some point becomes impossible. This scenario is now becoming apparent worldwide leading to grid problems at multiple levels. The answer to this problem is massive energy storage systems that can smooth and buffer the highs and lows throughout the system.
The WattJoule ElectrStor™ system allows operators to store energy when available and release it to the grid when required. This in turn evens out any mismatch between supply and demand, thereby eliminating the renewable energy variability problems, and providing for a continuous and stable electrical supply. An overall benefit is to enhance the value of the renewable energy being generated and eliminate the need for fossil fuel based electricity generation over the long term.
ElectriStor™ technology is ideally suited for integrating renewables such as PV and wind to the grid. Unlike most batteries, it does not degrade when fully discharged and is suited to long duration storage. This means it can handle the high volatility and diurnal cycles that characterize these sources. In addition, ElectriStor™ power and energy are independently scalable, allowing it to be optimized to your energy storage requirements, and, as the electrolyte does not degrade, it is fully recyclable and retains residual value over the system’s 20 plus year lifetime.
ElectriStor™ investment payback value streams include —
- Storing and selling otherwise curtailed and lost renewable-generated output,
- Providing grid interconnection compliance to gain access to high value Power Purchase Agreement payments,
- Improving the capacity factor of renewable generation to increase the total amount of energy delivered, and
- Shifting and shaping renewable energy to maximize its economic value.