When combined with SAJ’s highly efficient MPPT algorithms, the system delivers a 4.5% increase in overall energy conversion efficiency. The manufacturer also plans to release a 1250 V version.
To meet the challenge of rising electricity costs during peak hours for commercial and industrial renewable generation (C&I), Sanjing (SAJ) introduced the CH3 Series 125K Hybrid Inverter and CB3 Series Battery System – a 1500V DC-coupled C&I storage solution specifically designed for the stringent demands of the market.
According to SAJ, the cornerstone of the CH3 series is its advanced 1500 V DC architecture, which directly translates into lower Balance of System (BOS) costs for EPCs and project developers. By increasing the system voltage, the CH3 provides a 50% increase in the number of panels on each PV string compared to traditional 1000 V systems. The reduction in complexity results in 30% fewer DC cables and significantly lower installation costs. SAJ will also release a 1250 V version to meet the safety regulations required in different PV markets.
The DC-coupled architecture also eliminates unnecessary energy conversion steps. When combined with SAJ’s highly efficient MPPT algorithms, the company says it delivers a 4.5% increase in overall energy conversion efficiency. For a typical 1.5 MWp/2.6 MWh project, these gains can result in tens of thousands of euros in additional annual revenues, drastically shortening the payback period for investors.
Uncompromising safety and reliability
SAJ’s CH3 & CB3 PV+ESS solution is designed with a multi-layer protection framework. It features an integrated AFCI (arc fault circuit breaker) to detect and mitigate fire risks at the source, as well as PV string level disconnectors that can automatically isolate inputs during a fault.
According to SAJ, integrated connector temperature detectors prevent overheating caused by improper installation or wear and tear. With an IP66 protection rating, the system is built to withstand harsh outdoor environments, such as the humidity of coastal areas.
The CH3 series has a built-in EMS (Energy Management System) with 100 Mbps Ethernet communication. This ultra-fast response is critical for virtual power plants (VPP) and for responding to regularly updated price signals in the electricity market.
SAJ says the elekeeper monitoring platform allows users to leverage AI-driven scheduling for peak shaving, valley filling and hybrid control of diesel generators. The system also supports seamless transition to backup mode in less than 20 ms, ensuring critical industrial processes remain powered during power outages.
SAJ says the AC power of the CH3 and CB3 series ranges from 75 kW to 2.5 MW, while storage capacity can be scaled from 260 kWh to 20.8 MWh, providing flexibility for projects from small retail warehouses to large factories.
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