john90
Newbie level 6
how much current a laptop need
I had came across many solar charger products whereby they use a battery pack to store the solar energy and charge it to their laptops.
I had in mind thay i want to use the solar energy going to through regulator to charge my laptop battery.
I am using a 20w solar panel which generates a short circuit voltage of 12 to 13v and the short circuit current will generate a max of 1.6A depending on the sun intensity.
The solar panel is connected to the Dc-Dc converter and to the laptop.
I am using two sets of 4 solar cells in series connected in parallel therefore my panel consist of 8 solar cells.
The dc converts any input voltage between 12-13.8 volts to a range of 16v to 24v.
Since my compact laptop requires 18.5V , i set it to 19V, because the converter only have specific range like 18, 19 ,20etc..
The question is I was wondering why the laptop battery does charge not as the charging indicator does not light even with an solar current output of 1.10 A ?...
By the way the converter has an efficiency of about 85%.
Does it mean there is insufficient current to charge the laptop battery?..
I had this concept whereby any amount of current will charge the battery depending how much it takes to charge eg: trickle charge, float charge..
Correct me if i am wrong ..thx for reading...
Will adding another 4 cells in parallel solve the problem?
my laptop battery has a capacity of 4400mah
Today as i was testing, the solar cells are generating a range of current from 0.64A to 1.10A. Most of the time its generating 1.10A.
The light of the converter activates for the whole time as there is sufficient voltage..
I am curious there are some products such as solar rolls are able to trickle charge a laptop directly from the sun.
i have attached a link below:
https://www.treehugger.com/files/2008...onsidering.php
I had came across many solar charger products whereby they use a battery pack to store the solar energy and charge it to their laptops.
I had in mind thay i want to use the solar energy going to through regulator to charge my laptop battery.
I am using a 20w solar panel which generates a short circuit voltage of 12 to 13v and the short circuit current will generate a max of 1.6A depending on the sun intensity.
The solar panel is connected to the Dc-Dc converter and to the laptop.
I am using two sets of 4 solar cells in series connected in parallel therefore my panel consist of 8 solar cells.
The dc converts any input voltage between 12-13.8 volts to a range of 16v to 24v.
Since my compact laptop requires 18.5V , i set it to 19V, because the converter only have specific range like 18, 19 ,20etc..
The question is I was wondering why the laptop battery does charge not as the charging indicator does not light even with an solar current output of 1.10 A ?...
By the way the converter has an efficiency of about 85%.
Does it mean there is insufficient current to charge the laptop battery?..
I had this concept whereby any amount of current will charge the battery depending how much it takes to charge eg: trickle charge, float charge..
Correct me if i am wrong ..thx for reading...
Will adding another 4 cells in parallel solve the problem?
my laptop battery has a capacity of 4400mah
Today as i was testing, the solar cells are generating a range of current from 0.64A to 1.10A. Most of the time its generating 1.10A.
The light of the converter activates for the whole time as there is sufficient voltage..
I am curious there are some products such as solar rolls are able to trickle charge a laptop directly from the sun.
i have attached a link below:
https://www.treehugger.com/files/2008...onsidering.php