Shenzhen Lefu New Energy Co., LTD’s 10kW Solar System with Battery Storage
Harnessing Sustainable Energy with Shenzhen Lefu New Energy Co., LTD’s 10kW Solar System
In the developed regions of Europe and the United States, photovoltaic energy is economically accessible, yet residential electricity costs remain high. A significant challenge is the mismatch between PV generation (peak during daytime) and consumption patterns (higher during evenings), leading to a scenario where electricity is sold at low rates and purchased at a premium. Additionally, in less developed areas, unstable power grids and high electricity prices are prevalent. For these regions, the integration of residential photovoltaic systems with energy storage is not just beneficial but essential.
Maximizing Efficiency: The 10kW Solar System with Battery Storage
The 10kw solar system with battery storage from Shenzhen Lefu New Energy Co., LTD is designed to address these challenges by offering a robust solution that stabilizes voltage, ensures power availability during outages, and operates in various modes to optimize energy use. This system can function grid-tied, store energy from the grid for self-use, and operate independently off-grid.
Operational Modes of the 10kW Solar System
The system offers four primary operational modes, enhancing flexibility and efficiency:
Storage and Release: During daylight, PV generates electricity that is stored for use during evening peak demand.
Peak-Valley Arbitrage: The system charges during off-peak hours and discharges during peak hours, capitalizing on significant peak-valley price differences.
Anti-Islanding System: When PV output exceeds load demand, the surplus is stored, preventing energy waste.
Backup Power Supply: In the event of a grid outage, the system continues to operate as a backup power source, supplying power to loads via the inverter.
Technical Route Comparison: DC vs. AC Coupling
Shenzhen Lefu New Energy Co., LTD’s system includes solar modules, controllers, inverters, batteries, and loads, with two main topological structures: DC Coupling and AC Coupling.
DC Coupling: Direct current from PV modules is stored in batteries, with grid energy also charging the batteries through a bidirectional DC-AC converter.
AC Coupling: PV-generated direct current is inverted to AC, either powering loads or feeding the grid, with grid energy also charging the batteries.
Both coupling methods are mature solutions with distinct advantages, chosen based on specific application needs. DC coupling is slightly more cost-effective and ideal for new installations, while AC coupling is suitable for retrofitting existing PV systems without disrupting their operation.
Case Study: 10kW Residential Energy Storage System in Pakistan
Shenzhen Lefu New Energy Co., LTD designed a 10kW residential energy storage system for a villa in Pakistan, considering the customer’s electricity demands and solar conditions. The system, featuring a total load power of 6kW and daily consumption of 30 units, leverages the region’s 1200 annual effective utilization hours and 4.2 average daily peak sunshine hours.
Equipment Selection and Design
Inverter: A single-phase 10kW control inverter integrated machine was selected.
Modules: 18 pieces of 540W monocrystalline components, totaling 9.72kW, were designed to generate approximately 40 units daily, meeting the customer’s needs.
Battery Capacity: Based on nightly consumption, a lithium-ion battery system with a total capacity of 10.24 units was integrated.
Electrical Scheme and Function Commissioning
The system is designed with 18 modules in a 9-string and 2-parallel configuration, access to inverters, with batteries, loads, and the grid connected to respective circuit breakers. The inverter is programmed to adapt to various scenarios, with settings for grid-tied and off-grid modes, charging preferences, and peak-shaving and valley-filling functions
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By integrating advanced energy storage with a 10kW solar system, Shenzhen Lefu New Energy Co., LTD empowers residential customers with a reliable, efficient, and sustainable energy solution, embracing a greener future.