1. Configure a safe and reliable DC switch:
Residential power stations are often complex and located in remote areas. If a component experiences a short circuit or grounding, after-sales service may not be able to arrive immediately, potentially leading to a fire or electric shock. In such cases, the homeowner can disconnect the DC switch (this operation is very simple) to prevent the fault from escalating further.
2. Minimize noise:
Residential photovoltaic inverters are installed in homes. If they generate noise during operation, it will cause great inconvenience to people's lives. The noise of the inverter comes from the fan and the inductor. The inverter should adopt a fanless design with no fans inside or outside to eliminate the biggest noise source. The inductor should be potted with glue and placed in a separate aluminum shell to reduce the current and vibration noise of the inductor.
3. Multiple display methods are adopted:
It should have an LCD display screen for intuitive and convenient viewing, suitable for users without smartphones. Physical buttons have a short lifespan, while voice-controlled buttons are simple to operate and have a longer lifespan. It should adopt GPRS monitoring, allowing users to monitor the operation of the power station with their smartphones anytime, anywhere. It can manage thousands or even tens of thousands of power stations in a unified manner. The two-way monitoring system can provide proactive services, including problem detection, fault warning, and remote problem diagnosis and handling.
4. High power generation: Many factors affect the power generation of an inverter, which need to be considered:
First and foremost, the inverter must be stable and not break down, because if the inverter malfunctions, it will take at least two or three days, and sometimes as long as five or six days, during which time the electricity bill will be very high.
Secondly, there is the efficiency of the inverter. The three efficiencies of the inverter are maximum efficiency, weighted efficiency, and MPPT efficiency. The weighted comprehensive efficiency has the greatest impact on power generation because the inverter operates at a power level below the rated power for the most time.
Thirdly, the DC operating voltage range. The wider the voltage range, the earlier the start-up and the later the shutdown, resulting in longer power generation time and higher power output.
Fourth, the MPPT tracking technology should have high accuracy and fast dynamic response speed to adapt to rapid changes in sunlight and improve power generation efficiency. Fifth, the inverter's output voltage range should also be wide, ideally between 180-270V, but it should not be too high, as exceeding 270V will affect household appliances.
