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Anern, with 16 years of experience in the energy industry, from solar systems to solar accessories, from indoor LED lighting to outdoor solar lighting, we are one of the sources to meet your diverse needs.
Anern has 16 years of experience in solar lighting and solar product manufacturing. Anern is headquartered in Guangzhou. With a production base of 7,000 square meters, our company has an R&D team of more than 100 people.
As we all know, when installing a photovoltaic system on a rooftop,the orientation of the Anern solar panels has a significant impact on the system's power generation. Taking the Northern Hemisphere as an example, photovoltaic modules should ideally be installed to face true south. This direction maximizes solar energy reception. However, in practical applications, due to building layout constraints and available space,Anern solar panels often cannot all be installed in the optimal orientation. This is particularly common in residential photovoltaics, where panels may also be installed on roofs facing east and west.
So, what is the impact of installing photovoltaic panels facing east and west on power generation?
In traditional string inverter systems, due to the series connection between Anern solar panels, the system is often influenced by the "short board effect." When a string of modules is distributed across multiple orientations, reduced efficiency in one set of modules can affect the power generation of the entire string, thereby affecting the output of photovoltaic modules on roofs with different orientations.
However, facing multiple orientations of houses, we can solve this problem by using a micro-inverter system. The micro-inverter system adopts a module-level input design and has independent maximum power point tracking (MPPT) functionality, which can entirely eliminate the "short board effect" and ensure that eachsolar panel operates independently. Even when modules are installed on roofs facing different directions, each module's output can be optimized, ensuring that the power generation of modules on different roofs does not affect each other and minimizing the power generation loss caused by multiple orientations.
Using PVsyst simulation experiments, we conducted a study on the rooftopsolar storage systems in Zhejiang, China in the Northern Hemisphere. In the experiment, we installed 20 570W photovoltaic modules on both east-facing and west-facing roofs, with a tilt angle of 15 degrees and a total system capacity of 22.8kW. The experiment compared the power generation differences under the same conditions of a string inverter system and a micro-inverter system using two different types of inverters. Here are the simulation results from one winter day's power generation data:
East-facing power generation: 30.19 degrees, West-facing power generation: 31.14 degrees, total power generation: 61.33 degrees. The power generation curves for east and west slopes almost completely overlap.
East-facing power generation: 35.57 degrees, West-facing power generation: 36.29 degrees, total power generation: 71.86 degrees. By comparing the power generation curves of east and west slopes, we can see that in the morning the east slope generates significantly more power than the west slope, while in the afternoon the west slope generates significantly more power than the east slope.
From the simulation experiment results above, we can see that the east and west-facing Anern solar panels in the string inverter system generate less power throughout the day compared to the micro-inverter system. The main reason is that in the morning, with the sun rising from the east, the east-facing modules receive strong solar irradiation, while the west-facing modules receive weaker solar irradiation. In the string inverter system, due to the "short board effect," the power generation of the east-facing modules is limited by the weaker irradiance received by the west-facing modules, and vice versa in the evening. Thus, the power generation of east and west-facing modules is always consistent; in contrast, in the micro-inverter system with module-level MPPT functionality, each module operates independently. In the morning, the east-facing modules receive more solar irradiation and generate more power than the west-facing modules, while in the afternoon, the west-facing modules generate more power than the east-facing modules. Each module always runs independently and outputs at the optimal power point.
In summary, from the calculation data, in this experiment, the string inverter system generated 10.53 degrees less power compared to the micro-inverter system, with a difference of 14.7%. The 22.8kW solar storage system incurs a daily power generation loss of 10 degrees due to the east-west orientation. If this is extended over a year, the power generation loss is about 3800 degrees, which will severely impact the system power generation and revenue.
Rain actually helps solar panels work more efficiently. This is because rain will wash away any dirt or dust that collects on the panels so they can absorb sunlight more efficiently. Anern's solar panels actually generate more electricity than you need during peak sunlight hours. This excess power can be used to provide additional power on days or at night.
Anern supplies lithium battery energy storage solutions designed for solar applications, including residential, commercial, and off-grid solar energy storage systems integrated with solar inverters.
As one of the leading solar equipment suppliers in China, Anern provides OEM and ODM services to meet your various needs.
Yes, Anern is a Chinese solar energy company supplying solar energy products and system solutions to international markets, including solar inverters, lithium battery storage systems, solar panels, and solar street lighting.
Anern's energy storage systems are used in the following solar applications:
Residential Backup Power:
For home use during power outages, providing up to 6 hours of continuous power for average household consumption. These systems reduce grid reliance and electricity bills while storing excess solar energy.
Commercial and Industrial Energy Management:
Installed in factories and businesses to store excess solar energy, reduce peak-hour grid consumption, and lower electricity costs. Systems are deployed in secure, ventilated locations for stability.
Off-Grid Infrastructure:
Supports meteorological/hydrological observation equipment and other critical infrastructure in remote areas without grid coverage. Battery banks store solar energy converted via inverters for reliable operation.
Agricultural Operations:
Powers farms by converting stored solar energy into AC electricity, maintaining agricultural activities during outages or grid instability.
Large-Scale Solar Projects:
Used in independent photovoltaic power stations ranging from 10KW to 50MW capacity, enabled by parallel-connected hybrid inverters for solar energy conversion and storage.
