So what effect does it have on the overall charging time?
Here are some figures, let me explain something here:
Figure 1: The Efficiency of Solar Charge Controller
What is a solar charge controller?
Solar charge controller is a part of a solar installation and play a core role. Basically, it regulates the current and voltage coming from the solar panels going to the battery to keep batteries from overcharging. To put it in another way, it is a voltage and current regulator.
Why it will effect charging time?
It works like a water faucet switch. If we turn this water faucet on to maximum, we can fill our water cup quickly. So charge controller will effect charging time in the same way.
Figure 2: Battery State
Rechargeable batteries, including lithium-ion batteries, will age with time goes by. It will gradually lose capability, although the pace of deterioration will be slow. Battery capacity will decrease and battery internal resistance will increase with the process of battery aging. Charging speed also changes.
Figure 3: Battery Capacity
Battery power can change the charging time because of its different storage capacities. If you have a small battery and enough sunlight, you will get the expected power shortly. On the contrary, a large battery requires a longer charge than a smaller one. Smaller batteries store less power and take a short time to be charged.
Figure 4: Solar Panel Quality
The efficiency of the solar panel can affect the duration of charging. If you have solar panels with lower efficiency, it will take longer than the normal charging period. Photo-voltaic cells convert heat into electricity in a solar system.
So, the better cells you use, the better your result. It is suggested to use the standard cells with enough power production capacity.
Figure 5: The Amount of Sunlight Absorbed by the Solar Panels
Environment plays a vital part in solar energy production. It is strongly related to the weather and the sun. A place with bright sunlight will enhance productivity. But, winter and rainy seasons can affect the charging time. You can get the perfect calculation by analyzing where the panels are installed.
Solar panel size also very important in solar energy production. The larger the area of the solar panel, the more solar light the solar panel absorbs, and the more energy it converts into electricity, so the larger the area of the solar panel, the faster it charges under the same amount of light.