Household Energy System Solution

Background of the plan

With the energy transition and increasing environmental awareness, the demand for household energy systems is growing. Qingdao Kelin leverages its technological advantages to create a system that integrates charging stations, air source heat pumps, photovoltaic power generation, and reverse electricity sales. It utilizes an EMS management system to achieve intelligent control and provide users with efficient, green, and economical energy solutions.

System composition

1. Photovoltaic power generation components: high-efficiency monocrystalline silicon photovoltaic panels are selected, with high conversion efficiency and adaptability to different lighting conditions. Flexible power configuration based on roof or available installation area and household electricity demand, with common specifications ranging from 5-20kWp, to meet the needs from basic electricity to surplus electricity grid connection.

2. Charging station: Provides two options: AC slow charging and DC fast charging. The power of the AC charging station is about 7kW, suitable for night or long-term parking charging; The power of the DC fast charging pile can reach 60kW, meeting the needs of rapid energy replenishment for emergency travel, and the charging interface is compatible with various types of electric vehicles.

3. Air source heat pump: adopting advanced vortex compressor technology, with a wide working temperature range, stable operation from -25 ℃ to 43 ℃. The winter heating COP value exceeds 3.0, and the summer cooling energy efficiency ratio reaches 4.0 or above, achieving efficient heating and cooling, providing domestic hot water, and meeting the comprehensive energy needs of households.

4. Bidirectional inverter: connects photovoltaic power generation components to the grid, converts photovoltaic DC power into AC power for household use, and connects surplus electricity to the grid. Equipped with Maximum Power Point Tracking (MPPT) technology, it improves power generation efficiency, supports bidirectional metering, and accurately calculates power generation and grid connected electricity.

5. EMS management system: Real time collection of photovoltaic panel power generation data, charging station status, air source heat pump operating parameters, household electricity consumption and grid information. Based on preset strategies and real-time data, automatically control the operation of various devices, optimize energy allocation, provide user mobile and computer interfaces, and achieve remote monitoring and operation.

Operating mode

When there is sufficient sunlight during the day, photovoltaic power generation is prioritized for household loads, and excess electricity is stored in batteries (when an energy storage system is optional) or directly sold online. The EMS management system automatically regulates the operation of charging stations and air source heat pumps based on electricity prices and demand, such as starting the air source heat pump to reserve energy during low electricity prices.

2. At night or when there is insufficient light, household electricity should be obtained from the power grid first. If equipped with energy storage systems, priority should be given to using energy storage. Charging stations charge according to user settings and electricity price periods, while air source heat pumps maintain indoor temperature as needed.

3. Electric vehicle charging strategy: During valley electricity price periods, EMS automatically starts charging stations to charge electric vehicles; When the peak electricity price is high and there is sufficient photovoltaic power generation, use the surplus electricity from photovoltaics to charge; When rapid charging is required in emergency situations, start the DC fast charging pile and combine it with the power grid and energy storage (if any) for power supply.

Installation and after-sales service

1. Installation service: A professional team conducts on-site inspections and develops personalized plans based on the structure, orientation, and electricity needs of the building. Strictly install equipment according to standard specifications to ensure safe and stable operation, and conduct comprehensive debugging and testing after completion.

2. After sales service: Provide equipment warranty, regular follow-up and inspection. Establish a 24/7 response mechanism to promptly address faults and issues, provide technical consultation and remote guidance, and ensure the long-term stable operation of the system.

Economic Benefit Analysis

1. Electricity cost savings: Self use reduces electricity expenses, surplus electricity is connected to the grid to increase income, and household energy costs are reduced.

2. Investment return: Although there are equipment and installation costs in the early stage, long-term savings in electricity bills and sales revenue, combined with policy subsidies, generally take 6-8 years to recover costs, and later enjoy low-cost energy and sustainable benefits.