Energy storage solutions show a sustainable future at Intersolar

By leveraging its core competence in power electronics, leadership in energy conversion efficiency and expertise in system integration, Delta develops intelligent solutions capable of optimising the adoption of solar PV power and energy storage not only to support the transition megatrend from centralised energy supply to decentralised renewable energy plants, but also to enable greater electricity costs savings as well as a more reliable and eco-friendly energy supply.  

Visitors to Delta’s stand had close access to key innovative and eco-friendly solutions, such as the Commercial Battery Energy Storage System ES30 Series, which is a 3-phase 90kWh li-ion battery energy storage system suitable for commercial and industrial applications. The AC coupled system in a standard 19” rack that features a flexible and modular design scalable from 6-90kWh battery capacity. A 30kW Power Conversion System (PCS) with a 0.99AC output power factor and integrated Battery Management System (BMS) were included in the scope of delivery.     

The system also includes:

• 30kW continuous power for more than two hours (with 90kWh battery capacity).
• Modular and flexible design allows power expansion up to 90kWh.
• Reliable and high quality Li-ion battery modules with cycle life greater than 6,000 cycles.
• When combined with the Delta PPM P3E Power Meter and the R4 Smart Monitor Energy Management System, many different customised energy usage modes can be realised.

Applications include:

• Limiting feed-in power to the grid from solar power generation according to a dynamic trend or by a fixed value.
• Maximised self-consumption of the self-produced energy for commercial buildings or small businesses.
• Peak-shaving and -shifting to allow the lower cost electric power to be stored to the battery bank as energy reserve, and the energy is then dispatched during peak rate periods for lower electric power cost.
• Can be utilised to control reactive power to stabilise grid voltage.

Solar PV Inverters for Commercial Applications
High-power and high-efficiency string inverters are suitable for large commercial and ground-mounted PV plants with megawatt-sized solar arrays where optimum yield is important to ensure a valuable investment return from the system. Thus, Delta´s new flagship inverter model, the 3-phase M88H series, offers maximum 88kVA output power, active cooling and industry-leading peak efficiency of up to 98.8%.

Other value-added features are:

• 2 MPP trackers and a high maximum input voltage up to 1100V allow for extra flexibility in system design and better performance in challenging conditions.
• Rugged die-cast aluminium chassis and wiring box feature IP65 enclosure rating designed for outdoor installation even in harsh environments.
• All-in-one design which greatly reduces the need for costly external devices.  In fact, it includes built-in DC switches and AC and DC surge protection devices (SPDs). Multiple communication interfaces are available such as RS-485.

Residential Battery Energy Storage System
The Hybrid E5 energy storage system is composed of the E5 hybrid inverter as well as an external cabinet equipped with a 6kWh Li-ion battery, a Power Meter and a Smart Monitor. The Hybrid E5 storage system is designed for new PV systems and boasts a high charging efficiency up to 95% of DC electricity from the PV array to the battery without additional equipment needed.

The system also includes:

• Greater flexibility and simplified installation as inverter and cabinet are separate.
• The Smart Monitor not only controls the E5 inverter and battery functionality in an optimised way but it also serves as a gateway for visualisation via mobile devices.
• High peak efficiency (PV to Grid) of 97.2% and nominal continuous power output of 5.0kW for E5 hybrid inverter.
• Built-in customised energy management modes for various customer needs.