The RESS is designed to provide storage for residential solar systems and if used wisely will mean that the residents can completely isolate themselves from the grid. This would only be possible if they have enough solar to provide for all the demands in a 24 hour period. The vast majority of grid connected systems are only supplementary as they fall well short of providing enough power.
The RESS will qualify for the recently announced subsidy for self-consumption PV systems with storage in Germany. RESS has several modular power options available for a peak capacity from 4.5kWh to 17.8kWh, includes a lithium battery with an incentive policy compliant warranty and is available in either alternating current (AC) or direct current (DC) main circuit for on-the-grid or off-the-grid applications. RESS will also feature a touch-screen interface for easy operation and an intelligent control system that can be accessed remotely for real-time monitoring.
The unit is exempt from The EU Anti dumping tarries and the majority of component are not made in Mainland China. The following is a video interview regarding the product at a recent trade show in Germany.
As can be seen the system in Germany will qualify for subsidies and be popular with those with the money and enough solar power to be totally independent from the grid.
Now this is where the story takes a twist. The following is an extract from a story run in the times of Israel. Unlike the German experience its a whole new ball game in Israel. The following article is self explanatory and is a great contrast. Sadly this is the more likely scenario that will be experienced in many countries. Utility companies in several states of the USA already challenging tariffs paid by household with supplementary solar systems not being high enough to pay their fair share of grid upkeep.
The full story may be viewed at :
Solar device promotes another kind of energy independence
Israeli householders may be able cut their ties to the Israel Electric Corporation altogether. The Israel Electric Corporation has a new competitor — the sun. For the first time, Israelis will have the option not only of generating their own electricity from solar power, but of storing and using that power even when the sun isn’t shining. But given the IEC’s track record on solar energy production, some fear that the company will try to ensure that it doesn’t lose too many customers by keeping a new Chinese-made storage system out of the hands of Israelis.
Despite Israel’s recent gas finds, the price of electricity keeps increasing. By 2015, it will have increased by a whopping 40 percent over 2011 price levels. At some point after 2015, say economists, a “gas discount” will kick in, as the Israel Electric Corporation begins to use natural gas from the Tamar and Leviathan gas fields and cuts its imports of more expensive fuel.
To get off the price hike treadmill, some Israelis have been installing PV (photovoltaic) electricity systems on their rooftops. PV systems consist of an array of solar-collection panels and a device to convert collected solar energy to electricity. The system is usually connected to the local electrical service provider. Households with PV systems get a special meter that measures the amount of electricity produced by the system, for which they get a credit with the electric company which is deducted from the amount they spend on their energy usage. At the end of the billing period, the electric company either collects the amount owed (very rare for PV system owners), or sends the PV system owner a check for the electricity produced in excess of what was used (a much more common scenario).
Unfortunately for them, IEC has changed the terms and conditions of the deal with PV owners several times, reducing by nearly two thirds, for example, the amount of money paid per kilowatt hour generated by PV systems (the IEC, in its defense, says that the decrease was due to the canceling of government subsidies for the PV program).
With the RESS system, users can get off the treadmill and live the real dream of solar power, drawing from the free power supplied by the sun as needed,” the executive said, adding that “roughing” it without the IEC can work if the system is big enough (he recommends a 100-150 square meter PV panel setup) and by wisely using the sun’s power (such as running heavy-use electrical appliances like washing machines during the daylight hours), and relying on the RESS for lighter electrical uses. “In a sunny country like Israel, it should be easy to get into this kind of usage rhythm,” he said.
There’s just one problem with this scenario; Enerpoint hasn’t actually begun importing the RESS systems yet, and is still negotiating with the Customs Authority for an import permit. Could the IEC take this opportunity to kibosh the deal? The company’s previous record on private solar energy production has not been stellar. Besides changing the terms of its deal with PV system owners, the IEC dragged its feet last spring on setting up a new metering system to enable PV householders to take advantage of a technology that would enable them to actually use their own solar-produced electricity. While the credit system would remain in place, the new technology enables householders to draw power directly from their PV systems, instead of the electrical grid, with the excess sent to the IEC, and non-solar power drawn from the grid when necessary.