How C&I Storage Batteries Integrate with PV for Self-Consumption – Ensmar Technology

Introduction

System Components and Connection

PV Modules and Inverters

• PV Module Selection
  Ensmar Technology recommends that C&I users select suitable PV modules based on power demand, roof area and other conditions.
  Current high-efficiency monocrystalline silicon panels achieve conversion efficiencies of 22%–25%, generating more power within limited space.
  Durability and reliability should also be considered, with products passing strict quality inspections and certifications preferred.
• Inverter Selection and Connection
  The inverter is critical for converting DC power from PV panels to AC power.
  Ensmar Technology recommends inverters matched to the PV module power rating.
  The DC output of the panels is connected to the DC input of the inverter, ensuring correct and secure polarity connection.

C&I Energy Storage Lithium Battery System

• Battery Selection Criteria
  Batteries are selected based on actual load, peak-valley price difference, expected storage duration and other factors.
  Take Ensmar Technology’s Hades‑9650 as an example: it uses LiFePO₄ technology, with a cycle life of ≥6000 cycles (25℃±2℃, 0.5C @90% DOD, 70% EOL) and a design life of 15 years, meeting long-term stable storage needs.
  Capacity is determined by calculating average daily power consumption, PV generation and expected backup duration.
• Battery System Connection
  The Hades‑9650 connects to the PV system and grid via a bidirectional inverter.
  The bidirectional inverter stores excess PV power in the battery and discharges power to the load when needed.
  The battery system is equipped with an intelligent BMS to monitor voltage, current, temperature and other key parameters in real time, ensuring safe and efficient operation.

  ---

Intelligent Control and Energy Management

Intelligent Control System

• Real-Time Data Monitoring
  Ensmar Technology provides an intelligent control system for the integration of C&I Storage Batteries and PV systems.
  It monitors PV generation power, battery state of charge, charge/discharge status and C&I load data in real time.
• Remote Monitoring and Operation
  Users can remotely monitor system operation via mobile APP or PC software.
  System data and abnormal alarms are accessible anytime with an internet connection.

Energy Management Strategies

• Priority Self-Consumption Strategy
  During daylight hours with sufficient irradiance, the intelligent control system prioritizes PV power for on-site C&I use.
  When PV generation exceeds load demand, surplus power is automatically stored in the battery.
• Peak-Valley Tariff Strategy
  Combined with local peak-valley pricing policies, the system optimizes charge and discharge strategies.
  During off-peak low-tariff periods, the battery stores excess PV power or purchases low-cost grid power.
  During peak high-tariff periods, the battery supplies power to the C&I load, reducing expensive grid purchases and lowering electricity costs.

  ---

Summary and Outlook