Off-grid - also known as a stand-alone power system (SAPS).
In places where the grid availability is zero or where there are high instances or power cut,
it may be best to use a standalone inverter with a separate charge controller.
Hybrid inverters charge the batteries
using solar power during daylight. If the
battery goes low, or during insufficient
lighting, they charge the batteries from
the Grid. These systems automatically
switch between the solar power and
the Grid.
This is great way of replacing polluting
diesel generators. Your electricity bill
will be reduced and your diesel bill will
be eliminated.
Solar Water Pumps are systems that pump water from a water source depending on the intensity of sunlight falling on the solar panels.
In this system, the light falling on the solar panels gets converted to electricity and in turn, this electricity runs a motor to pump water
from a water body. With the increase in the intensity of the sunlight during daytime, the amount of electricity produced also increases.
This in-turn increases the output of the water pump.
The major differentiating factor about the solar water pumps from the other solar PV systems is that this does not necessarily require
another source of power(grid connection or battery back-up) for its operation.
ADVANTAGES OF SOLAR WATER PUMP
1. No external source of energy like running grid or fuel is needed.
2. Recurring cost on fuel and electricity is excluded.
3. Issues like Low voltage/Single Phase/Motor burning are taken care.
4. Can be installed in remote areas where there is no access for electricity or fuel like
petrol or diesel.
5. Low maintenance due to less moving parts, unlike diesel pumps.
6. No lubrication needed.
On Grid Solar Rooftop PV(Photo Voltaic) system is also termed as a Grid-tied system or Utility interactive or Grid back feeding or Grid
intertie system. In this kind of system, the Solar is connected with utility grid (typically the power lines) along with the loads and
batteries if any are present. In pure on-grid solar PV system, batteries are not connected.
There are mainly three different types of pure on-grid solar PV systems addressing different situations.