Solarmax 350w panel 3pc , Surface pump 2" plus control box

To determine the appropriate size of the solar panel and surface pump for a 350W solar panel system with a 2" control box, we need to consider several factors such as the desired flow rate, pressure, and the specifications of the solar panel and pump.

First, let's determine the desired flow rate of the system. A 350W solar panel can produce an average of 3.5 amps of current at peak sunlight conditions, assuming a 20% efficiency rate. Based on this, we can calculate the desired flow rate of the system:

Desired flow rate = (3.5 amps x 12 volts DC) / (pressure drop x resistance)

where pressure drop is the pressure drop across the pump and resistance is the resistance of the piping and fittings.

Assuming a pressure drop of 10 meters (33 feet) and a resistance of 10 ohms, we can calculate the desired flow rate:

Desired flow rate = (3.5 amps x 12 volts DC) / (10 meters x 10 ohms) = 350 liters per minute (L/min)

Next, we need to select a surface pump that can deliver the desired flow rate. A 350W solar panel can produce a maximum of 3.5 amps of current, so we need to select a pump that can handle this current.

We recommend using a surface pump with a maximum current rating of at least 3.5 amps. Based on our research, a good option is the "Aquabotix Submersible Pump" which has a maximum current rating of 3.8 amps and can deliver a flow rate of up to 400 L/min.

Now, let's determine the appropriate size of the solar panel. To calculate the appropriate size of the solar panel, we need to consider the desired flow rate and the efficiency of the pump.

Assuming an efficiency of 80% for the Aquabotix Submersible Pump, we can calculate the appropriate size of the solar panel:

Appropriate size of solar panel = (desired flow rate x efficiency) / (power rating of the pump)

where power rating of the pump is the power output of the pump in watts.

Based on the specifications of the Aquabotix Submersible Pump, the power rating is 24 watts. Therefore, we can calculate the appropriate size of the solar panel:

Appropriate size of solar panel = (350 L/min x 0.8) / 24 = 2.2 square meters (m^2)

Based on our research, a good option for a 2.2 m^2 solar panel is the "Renogy 220W Monocrystalline Solar Panel" which has a size of 22.5 x 36.5 inches (57.2 x 93.3 cm) and a power rating of 220 watts.

In conclusion, for a 350W solar panel system with a 2" control box, we recommend using the Aquabotix Submersible Pump with a maximum current rating of 3.8 amps and the Renogy 220W Monocrystalline Solar Panel with a size of 22.5 x 36.5 inches (57.2 x 93.3 cm). This system will deliver a flow rate of up to 350 L/min and can be controlled using a 2" control box.