The key elements involved in solar power calculation. This will directly affect your purchase price, usage situation, and after-sales cost.

Hi Reader, This article is an abbreviated version. For a more detailed version, please click here.

Perhaps you have consulted several solar equipment suppliers and obtained various prices.

After carefully selecting and ordering a solar system, it was suddenly discovered after the installation. Why so little power generation?

Why is the battery backup time so short? Or the solar inverter cannot output power to your home load or other industrial equipment. Read this article and you will solve these problems.

Solar Power Calculation Key Element 1: What is the output-input voltage?

Renewable energy generation systems aim to provide sustainable electricity.

If even the most basic functions cannot be achieved, other calculations, designs, configurations, etc. Are all empty talk.

The solar system’s DC/AC voltage output must be compatible with your equipment.

The input voltage is electricity generated by solar panels or wind turbines. This electricity is input into the battery pack, and then through the inverter to your load.

In addition, for the input voltage of the hybrid and off-grid solar energy storage system, a deeper explanation is that when the battery is insufficient at night, the electricity input by the city’s main power supply is used as a supplement.

Example:

A customer once purchased a 5kw solar energy storage system with 220vac output voltage.

It wasn’t until the system was connected to the local government power grid that realized that local power grid voltage is 110vac/220vac dual voltage.

Which means this 5kW solar system cannot allow the 110vac/220vac government grid to replenish the battery pack at night.

The system also doesn’t offer automatic switching to city mains when the battery dies.

The result is that when you wake up hot from sleep, the air conditioner is already turned off.

Because the battery pack of the solar system is insufficient. Without a cool environment, your life experience is extremely poor.

How do we solve it?

Before ordering any photovoltaic/wind power generation system, we need to measure the AC voltage in our area.

Prevent delivery of solar systems that are not compatible with the city grid. — Click the orange text to view the operation video of measuring the regional voltage.

Different output voltages will also make solar inverters have various prices, just like the Panama customer in this case uses a dual-output 110vac/220vac inverter.

Solar Power Calculation Key Element 2: Without a utility grid, is there no output voltage adaptation problem?

The solar system inverter output is directed at your household load/industrial and commercial equipment.

Without the city’s main power supply, the PVMars energy storage system design does not include the AC input interface.

But the AC voltage at the output must be compatible with your existing load.

At this time, it is necessary to check the power labels of all loads/equipment, such as the microwave oven load in the figure below.

If the rated voltage is 220v-240v, then the output voltage of the PVMars solar hybrid inverter is set to 220vac, which can fully satisfy the normal operation of this microwave oven.

Because the output AC wave will have a range, normally there will be fluctuations of ±5%-10%.

You can also see how much power it needs from the power label of the load.

The PVMars 1kw-15kw product page comes with a detailed load power list. If you don’t know your load, you can click the orange font to jump to the product page.

Understand the content of the relevant tables, and judge which type of solar energy system is more suitable for your needs.

Perhaps you have noticed that there are two types of power on the microwave load power label above, input-rated power and output-rated power.

That is about Part 3 on the key elements of solar power calculation. Read on.

Solar Power Calculation key element 3: Is your device a capacitive or inductive load?

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Solar Power Calculation Key Element 4: Why Are Solar Panels Low in Power Generation? Short battery backup time?

PVMars professional engineers will design the number and capacity of solar panels and batteries according to your load and start-up time.

Assuming your air conditioner will be on for 8 hours, based on the minimum current of 12A on the power label, it will take about 11kWh.

Added the power consumption of other loads, if the total needs are 20kWh a day, will 36 pcs of 550W solar panels be needed in the end?

The answer is wrong.

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Final words:

Combining these 4 key elements of solar computing that are most easily overlooked by everyone, you will get a 100% match for your solar, wind, and other renewable energy power generation systems.

PVMars would rather invest a lot of manpower in the early stage to build a photovoltaic energy storage system with high adaptability for you.

We do not want you to waste more money and time because of after-sales problems later.

Everyone’s time is precious, after reading this blog, contact our energy experts to provide you with a complete solution.