# DC Motor connected directly with solar panels

• newbie123
In summary, when using AC and DC Motors, it is important to consider the power input in watts rather than horsepower. If the power source is not capable of supplying enough watts, it can cause the motor to run slower or stall, potentially leading to damage or overheating. Properly designed systems would include a battery bank for consistent power supply and protections to prevent damage to the motor.

#### newbie123

Hello,

I have many time thought about AC & DC Motors, but have not yet find out. Example. if a motor of 4HP 48VDC. We give it power 48VDC but 1HP power, so what happens? And what if we connect it directly with solar panels of 48VDC and 4HP power.

So when sunshine is lower how it will affect motor? Will the motor burn up if it is lower current than it is rated on motor?

Best Regards

We need to use watts rather than horsepower. HP is a mechanical unit but watts can be mechanical or electrical.

1 HP = 746 watts output from the motor. 4 HP = 2984 watts.
These are loads on the motor.

If the motor was 100 % efficient, you would have to supply 2984 watts into the motor to let it rotate a 4 HP or 2984 watt load at the right speed.

If the power source isn't capable of supplying 2984 watts (62 amps at 48 volts) the supply voltage would drop below 48 volts and the motor would either run slower or stall with a 2984 watt load.

If the motor stalled, the power supply fuse might blow or the motor would get hot and possibly burn out.

Properly designed systems would run motors off a battery bank which would supply power when the sun wasn't shining.
The motor would also not be connected to a reduced voltage if this would damage it and it would be protected from excess current by current cutouts.

## 1. How does a DC motor connected directly with solar panels work?

A DC motor connected directly with solar panels works by converting the energy from the sun into electrical energy, which is then used to power the motor. The solar panels absorb sunlight and convert it into direct current (DC) electricity, which is then sent to the motor to create motion.

## 2. What are the benefits of connecting a DC motor directly with solar panels?

There are several benefits to connecting a DC motor directly with solar panels. One of the main benefits is that it allows for a more efficient use of solar energy, as the energy is converted directly into motion without the need for additional equipment. Additionally, this setup is more cost-effective and environmentally friendly compared to using traditional power sources.

## 3. Can a DC motor connected with solar panels be used for different purposes?

Yes, a DC motor connected with solar panels can be used for various purposes, depending on the specific needs and applications. It can be used for tasks such as pumping water, generating electricity, or powering small appliances. The versatility of this setup makes it a popular choice for off-grid and sustainable energy solutions.

## 4. Are there any limitations to using a DC motor connected directly with solar panels?

One limitation of using a DC motor connected directly with solar panels is that it only works when there is sufficient sunlight available. This means that the motor may not function at night or during cloudy days. Additionally, the size and efficiency of the solar panels will also impact the performance and power output of the motor.

## 5. Is it possible to store the energy generated by a DC motor connected with solar panels?

Yes, it is possible to store the energy generated by a DC motor connected with solar panels using a battery or other energy storage system. This allows for the energy to be used later when the motor is not in use or when there is no sunlight available. By storing the energy, this setup can provide a more reliable and consistent power source.

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