I do not have a solar energy system yet, but I have such a plan, which is why have done a bit of reading around.
Maybe you are like me and you are looking for resources and any help you can get.

Here is a calculator to help you size your battery, charge controller, nubmber of solar panels you will need, etc.
Before you start, you will have to know what is your energy requirement, i.e., how many watts of electricity do you intend to use with solar.
It will help a lot if you watch the videos (video links) posted on this section earlier.

If you intend to watch TV with your decoder, run few light bulbs, fan and computer when power fails, you can start with, say, 1200 watts.
In the calculator, choose temperature of 80F(27C), since Nigeria climate is warm.
Choose 5 hours of sunlight; that is what we get on the average every day.
For the inverter, normally your inverter should be able to handle loads about 30% above your total energy need to take care of surges.

The calculator will make corrections for energy losses due to fact that the system is not 100% perfect.
So the figures you get are good to use.
But if you would like to follow the logic of how they came about, watch the videos, if data permits.

Click "Like" if you found this helpful.

https://www.altestore.com/store/calculators/off_grid_calculator/