This section is a continuation of my main blog. Please click here to read my main blog.
The main reason for going with a 3 KVA battery is to be able to power devices at night. If only 1 KVA battery is used then during the day power can be generated and consumed. At night power can be taken for consumption from the grid.
Just ensure the installed capacity of the solar panels is twice more than the power consumed. Otherwise the batteries discharge during the day, and as a result the batteries will not last long.
The main reason for going with a 3 KVA battery is to be able to power devices at night. If only 1 KVA battery is used then during the day power can be generated and consumed. At night power can be taken for consumption from the grid.
Just ensure the installed capacity of the solar panels is twice more than the power consumed. Otherwise the batteries discharge during the day, and as a result the batteries will not last long.
To be able to understand this, a few
concepts need to be understood as below.
Grid Tie Inverter:
It is a simple inverter that converts DC to AC. In addition it “listens” to the power lines off the grid and synchronizes its output frequency and voltage to the frequency and voltage of the power lines.
Say the power consumption is 500 Watts
and the grid tie inverter output is 250 Watts. Effectively 250 Watts
from the grid tie inverter is consumed , the remaining power is drawn
from the grid.
Refer the video below, it is simple to plug and play the grid tie inverter.
In addition grid tie inverter has a safety feature (Which makes it hard to use as is). When the power goes off in the grid , the grid tie inverter shuts itself off. The reason being power might have been turned off to do some maintenance work on the power lines. If the grid tie inverter keeps running it will pose a safety hazard to the electric power workers.
Circuit Diagram:
Grid tie inverter
produces the AC power to feed the house. Any excess AC power will be
used by the other (Dual)inverter to charge the battery bank. When
the grid tie inverter is not operational at night, the inverter
converts DC power from battery to AC power and feeds the house. This
way we have eliminated the charge controller but added an additional
inverter (dual inverter).
NOTE:- Please buy quality components
from known brands for your solar system. Do not buy cheap components.
Power generation does pose a hazard and needs to be done carefully.
There are many variations of the above circuit diagram. The above is the simplest to explain, so i included it. The principle is simple. An additional inverter with battery as power source, "acting" like a grid so that grid tie inverter will function normally.
References
The guy in the
youtube talks about more complex systems too. So feel free to listen
to them if interested.
This section is a continuation of my main blog. Please click here to read my main blog.
This section is a continuation of my main blog. Please click here to read my main blog.
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