GB/T 33766-2017 in English
VALIDTechnical requirements for independent energy of solar photovoltaic system
- Issued on:2017-05-31
- Implemented on:2017-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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《GB/T 33766-2017独立太阳能光伏电源系统技术要求》由424-cnis（中国标准化研究院）归口，主管部门为国家市场监督管理总局。
Introduction
In-depth interpretation of the technical requirements standard for independent solar photovoltaic power systems
1. Background and significance of the standard
GB/T 33766—2017 is a national standard of the People's Republic of China, which specifies the terminology, technical requirements and test methods for independent solar photovoltaic power systems. This standard applies to independent systems with a rated power of no more than $1.0\mathrm{~kW}$ and a DC output of $72\mathrm{~V}$ or an AC output of $220\mathrm{~V}$. The significance of its formulation is:
- Unify industry technical standards and improve product quality
- Promote the promotion and application of solar photovoltaic technology
- Regulate market order and ensure user safety
2. System composition and key technical parameters
| System components | Technical requirements | Standard basis |
|---|---|---|
| Photovoltaic module | Rated power meets user needs, efficiency curve matches load | GB/T9535 (crystalline silicon) and GB/T18911 (thin film photovoltaic) |
| Controller | With anti-reverse charging and overcharging protection functions, rated current ≥ 1.5 times the maximum system current | 5.4 in GB/T19064-2003 |
| Battery | The capacity meets the load requirements and supports continuous power supply on rainy days | GB/T22473 (lead-acid) and GB31241 (lithium-ion) |
| Inverter | Output power ≥ 1.2 times the system load power, in line with GB/T 20321.1 | - |
3. Technical Requirements and Test Methods
The standard specifies the technical requirements of the system, including:
- Appearance requirements: Components must be clearly labeled and comply with design specifications
- Configuration requirements: System failure is mainly caused by insufficient power generation due to continuous rainy days
- Safety requirements: Electrical safety, fire safety and lightning protection safety
3.1 System test conditions
The test is divided into two environments: indoor and outdoor. The specific requirements are as follows:
| Test type | Temperature range | Irradiance requirement |
|---|---|---|
| Outdoor test | Battery: $30~^{\circ}\mathrm{C} \pm 3^\circ\mathrm{C}$ | $4~\mathrm{kW\cdot h}/(\mathrm{m}^{2}\cdot\mathrm{d}) \pm 0.3$ |
| Indoor test | Environment: $25~^{\circ}\mathrm{C} \pm 5^\circ\mathrm{C}$ | Simulator: Class B or higher standard solar day |
4. Implementation suggestions and precautions
To ensure the normal operation of the system, the following implementation suggestions are put forward:
- Hardware selection:Choose appropriate PV panels and batteries according to the use environment
- System debugging:Ensure that all components are connected correctly and the functional tests are complete
- Daily maintenance:Regularly check the battery status and system operation
4.1 Battery Management Recommendations
To extend battery life, it is recommended to:
- Avoid deep discharge (DOD ≤ 80%)
- Perform equalization charging regularly
- Maintain ambient temperature within a reasonable range (25~40°C)
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