The Austrian firm my-PV presents n energy storage system, which optimizes the captive use of renewable surplus energy from photovoltaic systems. The “water battery” named AC Elwa-E recognizes the charging status of energy storage units within the household and uses any surplus energy to generate hot water – thereby saving costs and reducing CO2 emissions.
Due to the low cost of energy, owners of PV systems strive to produce as much energy as possible for their own use. Energy storage units, such as Powerwall recently presented by Tesla, are one possible solution. Yet, the more cost-effective way is to store energy in hot water.
“Our new product is an innovative hybrid-extension for common residential energy storage systems. The surplus energy that is not needed for household electricity or storage units is used to heat the water in a hot water tank”, explains Gerhard Rimpler, CEO of my-PV and inventor of the water Battery. Elwa-E is compatible with various energy storage units, inverters and home systems such as Varta Storage, SMA and Fronius etc. The open and independent AC ELWA-E communicates with common battery-management-systems through an innovative communication-interface. Furthermore, it is possible to connect it to smart home systems.
In addition to the battery designed for grid-connected systems, my-PV also offers AC Elwa-F for stand-alone systems. As soon as the water battery recognizes that the battery of the inverter is fully charged and it controls the water-heating.
