FAQ
Can PrimeVOLT Inverters be connected to thin-film modules?
There are two types of thin-film modules: Amorphous and CIGS. Their distinct structures require specific approaches.
Amorphous Modules: As the structure of amorphous modules differs from crystalline modules (single crystal and polycrystalline), a low-frequency transformer must be installed between the inverter’s AC output terminal and the electric supply, and it should be grounded in the PV + or PY-terminal. The isolation prevents TCO (Transparent Conductive Oxide) corrosion when connecting amorphous modules to transformerless inverters. There are also amorphous modules available in the market (such as FlRST SOLAR) that do not require a low-frequency transformer. In such cases, please contact the module suppliers for further confirmation.
CIGS Modules: CIGS modules generally do not have serious TCO corrosion issues, so most modules available in the market can be connected to our inverters. However, for safety purpose, it is advisable to confirm with the module suppliers before matching them with a transformerless inverter.
Are there any restrictions or precautions for installing PrimeVOLT inverters?
All PrimeVOLT inverters feature single-piece die-cast aluminum chassis without any welding process. This design ensures compactness and durability, making the inverter suitable for harsh environments. The chassis and heat sink are optimized for excellent thermal cooling.
In particular, the surface of the inverter is coated with anti-UV/anti-corrosion paint to provide protection against corrosion. As a result, there are minimal restrictions for outdoor installations, even in high humidity environments. However, to achieve optimal results, please consider the following guidelines:
1)Avoid direct sunlight
Direct sunlight will increase the temperature of the inverter. If the temperature becomes too high, the inverter will activate self-protection mechanisms, leading to a reduction in output power and a loss of power generation.
2)Ensure heat dissipation and ventilation
We do not recommend installing the inverter within an enclosure or box, as this can cause the temperature to rise and result in reduced output power due to insufficient space for heat dissipation.
How do the PrimeVOLT inverter connect to the internet for cloud monitoring?
The PrimeVOLT inverter offers several communication interfaces for connecting to the internet, including:
1)Ethernet RJ45: It is suitable for small installations where there is a network server in close proximity to the inverter.
2)RS485: It is designed for larger installations where multiple inverters are installed together.
3) WiFi (optional): This connectivity option is available for areas or buildings with strong WIFI signals.
When using RS485, it is important to follow the manual settings and use twisted wires, terminating resistors, and half-duplex (Half-Duplex) interface. For Ethernet connections, attention should be given to assigning an lP address to the inverter. In the case of WiFi, please use a USB WiFi dongle specified by PrimeVOLT.
What is the recommended approach for overloading PrimeVOLT inverters?
To optimize power generation with PrimeVOLT inverters, it is recommended to use an “overload’ ratio of 1.0~1.3 of the inverter’s nominal output power.
The maximum allowable “overload” ratio for the inverter is 1.36.
lt is important to consider the system type for the optimal configuration.
1) For tracker systems: Use an “overload” ratio of 1.0~1.1.
2) For ground installations with good air flow: Use an “overload” ratio of 1.0~1.2.
3) For rooftop installations with poor air flow and high temperatures: Use an “overload” ratio of 1.0~1.3.
This recommendation is based on the fact that higher temperatures can decrease the output power of photovoltaic modules.
For example, if the power coefficient of a module is -0.44% / K @ 25°C, and the module temperature is 65°C, the output power will decrease by 0.44*(65-25) = 17.6%. A 300 W panel will reduce its power to 300 * 82.4% = 247 watts.
Please note that the open circuit voltage of the string modules should never exceed the maximum input voltage of the inverter, regardless of temperature or irradiance, to ensure compliance with the manufacturer’s warranty.
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Suite 1, 237 Main Street, Osborne Park WA 6017, Australia
Hotline: 03 8618 9028；1800936168
