Growatt has launched its RISE 261H-XH series ESS for C&I use cases
This product can store and deliver energy of up to 261 kWh, while the corresponding AC power varies between 50 kW and 125 kW
It switches to off-grid mode within 10 ms of grid failure
Growatt, a supplier of PV inverters and energy storage systems (ESS), launched its latest RISE 261H-XH series ESS for evolving commercial & industrial (C&I) applications, positioning ESS as more than just a backup energy source.
Among the key product features, the company emphasizes integrating multiple energy sources on a single hybrid platform. These are PV, grid, a diesel generator (DG), and battery storage, all of which are AC-coupled via a built-in power conversion system (PCS). The heart of the system is the vertically stacked battery storage units, which comprise lithium iron phosphate (LFP) cells, each with a capacity of 314 Ah. With a cumulative storage capacity of 261 kWh, the system can be fitted with a PCS of multiple capacities (50 kW, 63 kW, 85 kW, or 125 kW) to match the prosumer’s demands. Also, for a higher C&I load, the capacity can be expanded to a maximum of 1.25 MW/ 2.61 MWh by connecting 10 ESSs in parallel, providing further flexibility for prosumers.
On the PV source side, the ESS, featuring 10 MPPT channels, accommodates up to 200% higher DC capacity (PV array) relative to rated AC power, maximizing solar harvesting.
From an operational perspective, it synchronizes with the grid supply in on-grid mode and matches DG voltage and frequency once the grid is out. During the on-grid phase, excess solar generation is used to charge batteries, maximizing PV self-consumption after fulfilling captive demands. It can transition to off-grid mode within 10 ms of a grid outage, activating the DG + ESS hybrid function. Here, the DG power supply is prioritized over the battery. However, once the C&I load overshoots, ESS will come into play by discharging in real-time, flattening load profiles, and maintaining system stability. At the same time, the company noted that the ESS can support a 3-phase unbalanced load of up to 100% (e.g., Phase A: 100 kW, Phase B: 0 kW, Phase C: 0 kW), further enhancing system stability. In addition, it can support up to 160% overload for up to 10 seconds during backup, enabling continuous operation with high starting-current inductive loads.