One of the biggest issue with the use of solar power is need for inverter and batteries, which need maintenance and replacement, a difficult proposition in the remote villages/ schools. This requirement arises as the lighting is required during the night time when sunlight is not available.
But water supply is required during day time only. Water could also be stored in the tanks. This obviates the need for costly batteries and inverter. There are two options - one using the DC water pump and two using linear current booster. This reduces the cost of whole system significantly and limit it to solar panel and pump only.
I am not aware whether these simple systems are being used in India. Will your organisation be the first to develop this in India? Please share your view and comments.
Dinesh Agrawal
The details of two system is given below
PV Direct
This type of water pumping is about as simple as it can get. A solar panel coupled directly to a DC water pump, without any batteries or inverters in between. When it’s sunny, water is pumped. These are commonly used in agricultural applications such as irrigation or livestock. Farmers around the world are switching to solar stock watering and drip irrigation due to its simplicity.
There are two ways to pump your water - quickly with high power consumption, or more slowly over a longer time with low power consumption. Low power consumption is why Simple Pump is an excellent solar submersible well pump alternative.
Therefore it can run for longer time and can often pump water on cloudy days when a panel direct connection would not provide enough energy to run the pump.
The disadvantage of using a LCB is that the pump will run slower during early or late periods or on cloudy days than it will run during peak sun hours.
But water supply is required during day time only. Water could also be stored in the tanks. This obviates the need for costly batteries and inverter. There are two options - one using the DC water pump and two using linear current booster. This reduces the cost of whole system significantly and limit it to solar panel and pump only.
I am not aware whether these simple systems are being used in India. Will your organisation be the first to develop this in India? Please share your view and comments.
Dinesh Agrawal
The details of two system is given below
PV Direct
This type of water pumping is about as simple as it can get. A solar panel coupled directly to a DC water pump, without any batteries or inverters in between. When it’s sunny, water is pumped. These are commonly used in agricultural applications such as irrigation or livestock. Farmers around the world are switching to solar stock watering and drip irrigation due to its simplicity.
There are two ways to pump your water - quickly with high power consumption, or more slowly over a longer time with low power consumption. Low power consumption is why Simple Pump is an excellent solar submersible well pump alternative.
Linear Current Booster
A linear current booster is a least cost way to pump water. A LCB boosts the current flow from a solar panel by sacrificing voltage to the pump. The advantage of doing this is that the pump can start earlier in the morning and run later in the afternoon or can operate from a smaller solar panel than a direct connection between the solar panel and the pump.
Therefore it can run for longer time and can often pump water on cloudy days when a panel direct connection would not provide enough energy to run the pump.
The disadvantage of using a LCB is that the pump will run slower during early or late periods or on cloudy days than it will run during peak sun hours.
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