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Can Solar Panels work at cloudy or rainy day? Will it automatically power off?

Solar panels work by harnessing the energy of sunlight to create energy, it also can generate electricity under some low light, but due to continuous rainy or hazy weather, the irradiance of sunlight is low, and the system reduces the power generation capacity. Average figures for solar panel power generation during monsoons show that solar panels generate 30-50% of their optimum generation on cloudy days and 10-20% in heavy rain.

The grid-connected power generation system and the national grid are operated together. When the PV system cannot meet the needs of the load, the electricity from the national grid will be automatically replenished, and there is no problem of power shortage and power cut.

What Hours do Solar Panels Work?

Solar panels are at their most efficient when the Sun is at its highest in the sky and when the weather is clear and sunny. This means that, for most places, they are at their most efficient around noon. However, the exact hours when solar panels will work depends on where you live and what time of year it is as, the longer the daylight lasts, the more hours can be spent generating power.

Do Solar Panels Work Forever?

Most common solar panels last for between 25 and 30 years, offering decades of use. However, technological advances, self-cleaning coatings, and other innovations could see the effective life of solar panels increase further.

How do Solar Panels Work When It Snows?

A thick layer of snow will block the sunlight from reaching the PV cells and prevent them from working until it is removed (or eventually melts). However, a small amount of snow should melt away or blow away, meaning that solar panels can still be used in snowy environments.

And Heated solar panels with snowfall sensors have been developed on the market and automatically heat and melt snow.

How many solar panels do you need?

It depends on home energy usage (average energy requirements and current energy use in watts), roof or property surface area (decide how many panels can be installed), orientation of your roof and geographic location (peak hours of sunlight your geographic location receives on average).

How to maintain solar panels?

Since there are no moving parts, solar panels require very little maintenance. Once you have covered the installation cost of solar panels, there are not much costs associated with maintaining them.

Having said that, you should inspect them a few times per year for dirt or some other things that might have piled on top. It is important that the panels are clean and there is nothing blocking them from efficiently absorbing the sun.

For a general cleaning, you can just use a normal garden hose to wash the face of the panels. You should do this in the morning or evening. Also avoid spraying them with cold water while they are hot because that might damage them.

Moreover, If the panels need some more cleaning that the hose cannot provide, you can use a sponge with soapy water to scrub them. You can also get the services of a cleaning company.

How many solar panel can be installed on your roof/place?

Considering the actual array and our installation experience,

For flat ground, C-type bracket, 1㎡ can be installed 130-150W.

shed frame bracket, 1㎡ can be installed 200-220W.

For Sloping roof, color-steel tile or glazed tile roof, 1㎡ can be installed 150-170W.

How much energy does a solar panel generated?

Well it will depend on the average sunlight hours in your location

For example, For 550W solar panel, the average sunlight hour is 5 hour per day in my city,

So the calculation will be 550W*5*0.8 as coefficient=2.2kwh/day.

How much solar energy do I need?

Consider your annual electricity usage to determine how much electricity you need your solar panels to produce. You should be able to see your total energy consumption from the last twelve months on your electric bill.

Is My Roof Suitable for Solar Panels?

In addition to estimating how many solar panels you need, consider the weight of the panels themselves. The average solar panel weighs around 40 pounds. It’s important to know what size solar system your roof can support, and remember, not all roofs can even support solar.

In addition to the weight, consider the material of your roof, how old it is, and whether it’s pitched or flat. All of these factors will help determine if your roof can support solar panels. It is also best to have a professional roof inspection before you decide to begin the installation process.


We specialize in solar energy solutions for whole complete set with solar panel, inveter, battery, bracket, cable etc.

Acceptable for customized dimensions and power in solar panel, adjustable for solar power system configuration base on your real situation.