Residential Energy Solution
As global attention shifts towards renewable energy, solar photovoltaic systems are becoming increasingly popular in California homes. With abundant sunshine in the state, residents are eager to use solar power to reduce electricity costs and carbon footprints, though they face the challenge of having more generation during the day and less at night. To address this issue, a home battery energy storage system (BESS) is an ideal solution. This plan utilizes two 30kWh battery packs and two 12kW inverters, effectively storing excess daytime electricity for use at night, reducing electricity costs, and providing backup power during outages. These systems need to meet a nighttime demand of 20kWh, with efficient charging and discharging capabilities and intelligent management features.
Project Overview
Available Only Through Renon Power
Challenges of Solar Energy Adoption in California
Addressing Generation and Storage Issues
In California, USA, solar photovoltaic systems are growing in popularity due to abundant sunshine and a desire for reduced electricity costs and carbon footprints. However, residents face issues such as the mismatch between high daytime solar generation and low nighttime generation, lack of effective energy storage, and challenges in achieving true energy independence, particularly during power outages.
Enhancing Economic Efficiency
Optimizing Electricity Costs and Leveraging Incentive Policies
To enhance economic efficiency, this project integrates solar photovoltaic and energy storage systems to optimize electricity usage and significantly reduce electricity expenses. The storage system allows users to store excess daytime power, decreasing reliance on the grid and thereby saving on electricity costs. Additionally, the design will take full advantage of California’s incentive policies, such as net metering and storage subsidies, to maximize economic benefits and policy gains. These measures will effectively increase energy autonomy and achieve cost savings.
Photovoltaic System
Maximizing Solar Potential for Sustainable Operations
California has abundant sunshine. However, a major challenge for photovoltaic systems is the mismatch in power generation timing—sufficient power during the day but inadequate generation at night. To effectively utilize solar energy, we have selected a photovoltaic system with a total installed capacity of 12kW, combined with an energy storage system. This setup stores excess power generated during the day to ensure availability during the night or cloudy periods, thereby enhancing energy autonomy and reducing dependence on the grid.
Inverter Selection:
Optimized Energy Storage for Continuous Power Supply
Inverters are crucial components in photovoltaic systems, responsible for converting the direct current (DC) produced by solar panels into alternating current (AC) for use in homes or the grid. In this project, we have selected two 15kW Sol-Ark low-voltage inverters. These inverters need to have efficient conversion capabilities to ensure stable power output, as well as to work in coordination with the photovoltaic system and energy storage system to optimize energy management and ensure overall system reliability.
Comprehensive Strategy
System Integration and Smart Management Advantages
Renon’s integrated solution offers high system integration by combining photovoltaic, energy storage, and inverters into a unified system. This simplifies installation and maintenance, improving overall system coordination and stability. Additionally, the intelligent energy management system allows for real-time monitoring and adjustment of energy distribution, ensuring efficient energy use. It also provides data analysis to help users understand their energy consumption patterns and make more informed energy planning decisions.
Overall Objective
Cost-Effective and Reliable Power Supply
The project features an integrated solar + energy storage solution, including high-efficiency photovoltaic modules, large-capacity lithium-ion battery packs, an intelligent energy management system, and the necessary hardware and software interfaces. This system will not only enhance the user’s energy autonomy but also significantly reduce electricity costs while providing reliable backup power to ensure the continuity of essential household electricity under any circumstances.
Core Component Selection
Renon Power Specialization
Battery System Selection
Selection: Xtreme LV 30.72kWh ESS *2
Rationale: The customer s nighttime electricity consumption is 20 kWh. Choosing a 30 kWh battery storage system can fully cover this demand and leave some extra capacity to handle unexpected high load situations or potential future increases in electricity needs.
Advantage: The Xtreme LV series batteries use advanced lithium-ion technology for a long cycle life and high energy density, providing stable power while reducing maintenance and lowering overall ownership costs. They meet U.S. safety standards and include protections against overcharge, over-discharge, and over-temperature, ensuring safe operation in various conditions.
Inverter selection
Selection: Sol-Ark 15kW LV Inverter *2
Rationale:The Sol-Ark 15K 2P inverter intelligently manages the energy flow between the photovoltaic panels, battery, and the grid, allowing for seamless switching between off-grid and grid-tied modes, thus improving energy efficiency. With a 15kW AC power capacity, it can cover most household loads and ensure the operation of essential devices even during grid outages.
Advantage:The design conforms to U.S. standards, ensuring compatibility with the local grid while supporting connections with various photovoltaic panels, enhancing system flexibility and scalability. The integrated design simplifies the installation process, and the built-in monitoring system facilitates remote diagnostics and maintenance, reducing operational and maintenance costs.
PV system power configuration
Selection: 12kW PV system
Rationale: A 12 kWp photovoltaic system is designed to meet the maximum input requirements of the Sol-Ark 15K 2P inverter. It is expected to generate 48-60 kWh per day, ensuring that the daily electricity generation exceeds the 40 kWh demand.
Benefits: High-efficiency photovoltaic panels suitable for California s sunlight conditions are selected to ensure good energy generation efficiency throughout different seasons.
Panels from well-known brands are chosen to ensure stable long-term performance, reduce the failure rate, and extend the lifespan of the system.
The photovoltaic panels are designed to withstand harsh weather conditions, while the battery system’s BMS provides multiple safety protections, ensuring long-term stability and safe operation of the system.
Deep Charge/Discharge and Long Lifespan:
The battery system features deep charge discharge capabilities and an intelligent Battery Management System (BMS), extending battery lifespan and maintaining high energy storage efficiency.
Efficient Energy Management:
Combines high energy density battery storage systems with intelligent energy scheduling in inverters to achieve high-efficiency energy transfer and optimal distribution from solar panels to the storage system and then to the load.
System Advantages
Environmental and Energy Savings:
Utilizing renewable energy reduces fossil fuel consumption and lowers carbon emissions, aligning with principles of green and sustainable development.
Backup Power Capability:
In the event of a power outage, the battery storage system seamlessly takes over to provide continuous power to essential household devices, ensuring reliable operation.
Cost Efficiency and Self-Sufficiency
The system’s ability to store excess solar energy for use during the night or cloudy days, combined with intelligent energy scheduling, reduces electricity bills, decreases reliance on external power grids, and achieves long-term energy cost savings.
