Power-One unveils PV and storage system prototype

Power-One unveils PV and storage system prototype

Power-One unveils PV and storage system prototype Energy Storage Journal

Power-One shows prototype of 2 kW storage system to support self-consumption and energy independence for home owners

Power-One, a US-headquartered inverter supplier, announced at Solarexpo in May that it has developed a prototype of a residential energy storage system.
The company says the system will be introduced in Italy and Germany, initially, in early 2014. Other interesting markets for residential PV storage solutions include France and the UK.

The prototype energy storage system consists of a 4.6 kW single-phase grid connected inverter, made by Power-One, and a lithium-ion (Li-ion) battery providing 2 kW of usable capacity.

The system allows home owners and landlords to store any excess energy produced during peak times for times with higher energy demands. The surplus electricity can be used to power home appliances during times when the PV installation does not produce any or insufficient energy.

Paolo Casini, VP of marketing at Power-One, says: ‘With our new storage solution we enable our customers to align energy production and consumption with their needs, thereby helping them to increase their self-consumption and save money on their energy bills.’
Residential energy storage systems require distributors and installers to collaborate with potential end-users, such as home owners, to calculate their energy usage patterns in order to ensure the household optimizes the amount of stored electricity that can operate appliances. In 2013, the company will work partners and installers to define sales approaches and tools for PV and storage.

The inverter is designed according to the voltage and current values required by the battery to ensure safety and longevity and must also communicate with the battery management system. The storage system will offer dual maximum power point trackers (MPPT), broad input voltage ranges as well as high efficiencies. Power-One plans to add basic load management outputs and an auxiliary AC output, which will allow operation of the system in power outages.

The energy storage system has been designed for a long life-cycle with a 10 year expected life of the battery and can also be expanded by additional battery modules to up to 9 kWh. Remote or local monitoring is possible without additional interfaces.