Do you want to save on your electricity bill. Use the sun at your favor!
The solar panels are made of cells that converts the solar energy to electricity.
At places with no electricity, one can install island type solar systems; the panels are charging batteries through a regulator, and an inverter converts that to AC for the house. But that requires maintenance and change of batteries, which can be a mess, and more possibilities of failures.
In a city, it is more convenient and economic to connect to the grid. During the day the panels generate electricity, which is used primary for the consumption in the home; the excess production sends to the CFE. At night when there is no sun, we receive power from CFE. They install a two-way meter for that purpose. Practically, we are using CFE as our battery.
Preferably the panels should be installed at a place with sun all year round, looking south, with no shadow from trees or walls in the mornings or afternoons.
The panels have an aluminum frame, and we make an aluminum structure to support them, to avoid galvanic current if it was made of steel, and so avoid maintenance problems in the future.
Central inverters are generally used for large systems, where the panels are serial connected. One disadvantage is that if one or more panels are in the shadow in some hours of the day, they will bring all the panels in the same series down to the same production level; it means that if one panel only gives 20% of what it could give if it was in full sun, it will bring all the panels in the same series down to 20%, even if the others are in the sun.
Micro inverters work independently. Each micro inverter connects to one panel and contributes with the maximum it can produce, 100%, or 20% if it is in shadow, but without affecting the other panels.
Today that’s what we use most for small and medium systems.
We can install an Energy Communication Unit to monitor the performance of the panels. It receives and stores the information from the inverters, and transmits them to the company’s server.
We can then connect to this server from their website or through an app, and see the generation at the moment, energy production per days, months or years, for each panel and the whole system.