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The residential photovoltaic grid-connected system is a solar power generation system that is connected to the local public power grid. The system captures sun radiation energy through solar panels installed on the roof or in the courtyard. It converts solar energy into direct current using the photovoltaic effect, and then the inverter converts it into alternating current that is compatible with household appliances and the power grid.
Product Description
The Residential PV Grid-connection System is optimized for household scenarios and adapted to complex power grids through an wide voltage range and automatic voltage regulation technology. The optional AFCl arc protection significantly enhances safety. The ready-to-use design meets the grid connection requirements of clean energy in scenarios.
Unlike off-grid systems that operate independently and rely on battery energy storage, grid-connected systems view the power grid as an extended energy storage mechanism. When the photovoltaic power generation exceeds the household electricity demand, the excess electricity can be transmitted to the grid; when the power generation is insufficient (such as at night or on cloudy days), the household can draw electricity from the grid to supplement. This two-way energy flow mode makes the residential photovoltaic grid-connected system the most widely used type in the current distributed photovoltaic field.
Core technical characteristics
• Intelligent anti-backflow function: Complies with grid connection safety standards and prevents current backflow.
• Multiple communication interfaces: Supports RS485/Wi-Fi/GPRS remote monitoring (choose one configuration among the three).
• Automatic voltage stabilization technology: Real-time adaptation to grid fluctuations to ensure stable operation.
• Fire safety upgrade: Built-in AFCl arc protection (optional function), reducing fire risk.
• onvenient installation and maintenance: The modular design simplifies the operation process.
Parameters
| System power | 3.6KW | 6KW | 10KW | 15KW | 20KW | 30KW |
| Solar panel power | 450W | 430W | 420W | |||
| Number of solar panels | 8 PCS | 14 PCS | 24 PCS | 36 PCS | 48 PCS | 72 PCS |
| Photovoltaic DC cable | 1 SET | |||||
| MC4 connector | 1 SET | |||||
| Rated output power of inverter | 3KW | 5KW | 8KW | 12KW | 17KW | 25KW |
| Maximum output apparent power | 3.3KVA | 5.5KVA | 8.8KVA | 13.2KVA | 18.7KVA | 27.5KVA |
| Rated grid voltage | 1/N/PE.220V | 3/N/PE,400V | ||||
| Grid voltage range | 180~276Vac | 270~480Vac | ||||
| Rated grid frequency | 50Hz | |||||
| Grid frequency range | 45~55Hz | |||||
| Maximum efficiency | 98.20% | 98.50% | ||||
| Island effect protection | YES | |||||
| DC reverse connection protection | YES | |||||
| AC short circuit protection | YES | |||||
| Leakage current protection | YES | |||||
| Protection level | IP65 | |||||
| Working temperature | -25 ~ +60°C | |||||
| Cooling method | Natural cooling | |||||
| Maximum working altitude | 4km | |||||
| Communication | 4G (optional) / WiFi (optional) | |||||
| AC output copper core cable | 1 SET | |||||
| Distribution box | 1 SET | |||||
| Auxiliary material | 1 SET | |||||
| Photovoltaic mounting type | Aluminum /Carbon steel mounting (one set) | |||||
Applicable Scenarios
▪ Residential rooftops:
Including flat concrete roofs, corrugated metal roofs, and tiled pitched roofs, these are the most typical installation scenarios for residential photovoltaics (PV). South-facing roofs receive better sun radiation.
▪ Villas and high-end residences:
Building-integrated photovoltaics (BIPV) or photovoltaic tiles can be used, balancing power generation with architectural aesthetics.
▪ Balconies and yards:
Homes with limited space can install lightweight PV systems on balconies; families with yards can build PV sunshades, carports, etc.
▪ Rural self-built houses:
Rural houses have ample roof space, suitable for installing larger-capacity grid-connected systems.
▪ New buildings:
Integrating distributed PV power generation equipment into building roofs, parking sheds, and other areas is encouraged.
Important Notes:
▶ Pre-installation Assessment
▪ Before installation, the roof's load-bearing capacity should be assessed to ensure it meets the load requirements of the photovoltaic system.
▪ Inspect the roof's orientation, slope angle, and whether there are trees or buildings obstructing the view. Obstruction will significantly affect power generation efficiency.
▪ Confirm the remaining service life of the roof should generally not be less than 20 years, and ensure proper waterproofing during installation.
▶ Grid Connection Procedures
▪ Residential photovoltaic projects require submitting a grid connection application and relevant documents to the local power supply company.
▶ Safety and Compliance
▪ Grid-connected equipment may be subject to grid dispatch management or remote control as required. Unauthorized external control interfaces should not be installed.
▪ The inverter output voltage should meet relevant standards. The power supply company may inspect the inverter parameters.
▶ Operation and Maintenance
▪ Investors should strengthen the monitoring of the operating status of grid-connected equipment and fulfill their responsibilities for grid voltage control.
▪ System installation should be carried out by professional personnel to ensure standardized wiring and adequate lightning protection grounding.
Summary
Residential grid-connected photovoltaic (PV) systems are a home energy solution that combines solar power generation with the public power grid. The system consists of core components such as photovoltaic modules, grid-connected inverters, mounting systems, and power metering devices, enabling a "self-consumption with surplus power fed into the grid" energy management model. Compared to off-grid systems, grid-connected systems do not require battery storage, resulting in lower initial investment, while the grid provides a supplementary guarantee for continuous power supply.
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