# Commercial and industrial PV-storage (off-grid) solution Suitable for commercial and industrial scenarios with grid-connection difficulties or off-grid power backup needs, the integrated PV and storage system ensures critical loads. Solution Overview For industrial and commercial customers facing grid connection difficulties, unstable grids, or requiring off-grid power backup, we provide an integrated PV and energy storage microgrid to safeguard production and critical loads. Key Points Integrated PV and storage, suitable for scenarios with grid connection difficulties or requiring power backup STS ensures seamless, uninterrupted power for critical loads Can serve as primary supply or backup, flexibly configured PCS power quality meets the requirements of inverters and PLCs Applicable Scenarios and Challenges In some regions, capacity expansion is restricted and grid connection cycles are long; or grid fluctuations/power rationing affect continuous production, and critical processes cannot tolerate power outages. VGRID System Composition **Power Conversion System (PCS)**: Enables unified conversion of PV, battery, and loads, supporting off-grid operation. **Static Transfer Switch (STS)**: Seamless switching between the main grid and microgrid, protecting automated production lines. **Battery Energy Storage System (BESS)**: Stores solar energy for supply security and smooths production load fluctuations. **Energy Management System (EMS)**: Dispatches according to production schedules, prioritizing green power and reducing demand charges. **Microgrid Power Switchgear (MPS)**: Factory-grade AC switchgear with integrated metering and protection. Core Value Overcome grid connection constraints and achieve rapid commissioning Uninterrupted power for critical loads, ensuring continuous production Green power for self-consumption, reducing electricity costs Modular deployment, scalable with production capacity Typical Applications Suitable for new industrial parks, border factories, data centers, and production lines with high power supply reliability requirements. Delivery and Support VGRID POWER provides integrated delivery from on-site assessment, system design, core equipment manufacturing (PCS/STS/BESS/MPS) to commissioning and remote operations and maintenance. Welcome to contact us for customized solutions and quotations. ## Can off-grid solar-plus-storage fully replace mains electricity? For scenarios where grid connection is difficult or power supply must be guaranteed, it can serve as the main supply; typically a diesel generator is configured or a mains interface is retained as an extreme fallback. ## Are production line automation devices compatible? The STS achieves seamless switching, and the power quality output by the PCS meets the requirements of inverters and PLCs. ## What size is typically configured for commercial and industrial off-grid solar-plus-storage? Modular configuration based on critical load power and backup duration, ranging from hundreds of kW to MW level. ## How do grid-connected and off-grid modes switch? The STS switches automatically at millisecond level, with no perceptible impact on loads; the EMS dispatches throughout the entire process.