Physical Environment
1) Operating temperature: The internal components of the inverter are high-power electronic devices that are very sensitive to temperature. The recommended operating range is typically between 0°C and 55°C. However, for safe and stable operation, it's best to keep the temperature below 40°C. In the control cabinet, the inverter should be installed at the top, following the manufacturer’s guidelines strictly. Avoid placing heat-generating components near the bottom of the inverter.
2) Ambient temperature: High ambient temperatures or significant temperature fluctuations can lead to condensation inside the inverter, reducing insulation performance and potentially causing short circuits. If necessary, desiccants and heaters should be added to the enclosure to maintain a stable environment.
3) Corrosive gases: High concentrations of corrosive gases can damage component leads, printed circuit boards, and accelerate the aging of plastic parts. In such cases, the control cabinet should be sealed and ventilated properly to minimize exposure.
4) Vibration and shock: Mechanical vibrations or shocks may cause poor electrical connections. To reduce this risk, improve the mechanical strength of the control cabinet, avoid placing it near vibration sources, and use anti-vibration pads for components like switches. Regular inspection and maintenance are also essential after prolonged operation.
Electrical Environment
1) Electromagnetic interference: The inverter generates electromagnetic waves during rectification and frequency conversion, which can interfere with nearby instruments. Use metal enclosures for shielding, ensure all components are grounded properly, and use shielded cables for wiring. The shielding layer must be grounded to prevent signal fluctuations and system instability.
2) Input overvoltage protection: While inverters usually have built-in overvoltage protection, long-term overvoltage on the input side can still cause damage. Always check the input voltage, whether single-phase or three-phase, and match it with the inverter's rated voltage. In areas with unstable power supply, a voltage stabilizer is essential to avoid serious issues.
3) Grounding: Proper grounding is crucial for improving system sensitivity and reducing noise. The grounding resistance of the inverter's E(G) terminal should be as low as possible, with a conductor cross-section of at least 2 mm² and a length under 20 meters. The inverter’s ground should be separate from power equipment grounds. The signal cable shield should be connected to E(G), but not grounded at the other end. Ensure the inverter and control cabinet are electrically connected; if difficult, use copper wire for bridging.
4) Lightning protection: Most inverters include a lightning absorption network to protect against surges. However, in areas with frequent lightning, especially when power lines are overhead, additional measures are needed. Install a lightning arrester at the incoming line or bury a steel pipe 20 meters away from the inverter. For cable entry systems, ensure the control room has proper lightning protection to prevent damage.
Solar Charge Controllers manage voltage and current from solar panels to batteries, preventing overcharging and optimizing Battery life for reliable energy storage.
Usage:
Solar charge controllers are used in off-grid solar power systems, such as solar street lights, solar water pumps, RVs, boats, and remote cabins. They are also used in grid-tied solar power systems with battery backup to manage the flow of electricity between the solar panels, battery, and grid.
Working principle:
Solar charge controllers work by monitoring the voltage and current from the solar panels and adjusting the charging parameters to maintain the battery at the optimal voltage level. When the battery is fully charged, the charge controller will reduce the charging current to prevent overcharging. Similarly, when the battery is low, the charge controller will increase the charging current to ensure the battery is properly charged.
Purpose:
The main purpose of a solar charge controller is to protect the battery from overcharging and discharging, which can reduce its lifespan and performance. By regulating the flow of electricity from the solar panels to the battery, the charge controller ensures that the battery is charged efficiently and safely. Additionally, solar charge controllers can also provide information on the performance of the solar power system, such as the amount of energy generated and stored in the battery.
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Bosin Power Limited , https://www.bosinsolar.com