Portable Solar panel system to run a small computer fan

Click For Summary

Discussion Overview

The discussion revolves around the feasibility of using two portable USB solar panels to simultaneously power a small computer fan and charge a battery bank, with the intention of having the batteries take over when sunlight is no longer available. The scope includes practical application and basic electronics concepts.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires whether it is possible to connect the solar panels, battery bank, and fan together to achieve the desired functionality.
  • Another participant suggests determining the battery pack's amp-hours and the fan's current draw as essential factors for the setup.
  • A different participant proposes running the fan off one battery pack until it runs low, then switching to the second pack, indicating a potential method for managing power supply.
  • There is a suggestion to build a circuit using Schottky diodes to combine the outputs of the two battery packs, although it is unclear if the original poster is familiar with this approach.
  • The original poster expresses a lack of electronics knowledge and considers simpler methods, such as charging one battery while the other runs the fan or switching between the solar panels and batteries at night.

Areas of Agreement / Disagreement

Participants have not reached a consensus on the best approach to connect the components, and multiple competing views regarding the setup remain. The discussion is still unresolved.

Contextual Notes

Participants have not provided specific details about the battery pack's capacity or the fan's current requirements, which may affect the feasibility of the proposed solutions.

Herbascious J
Messages
165
Reaction score
7
Hi all. Recently I purchased two portable USB solar panels, which are rated at 5 watts each. They both came with a 'battery bank' consisting of a single battery all running on 5 volts. I also purchased a 5 volt USB computer fan. My question is; can plug all these things in together so that the solar panels will simultaneously run the fan and charge the batteries so that when the sun goes down, the batteries can take over and run the fan?
I hope this is the correct section for this question. I'm new to this so I don't have much knowledge or insight. Thanks!
 
Physics news on Phys.org
Maybe. You need to determine the number of amp-hours of the battery pack as well as the current draw of the fan.
 
  • Like
Likes   Reactions: berkeman
Herbascious J said:
My question is; can plug all these things in together so that the solar panels will simultaneously run the fan and charge the batteries so that when the sun goes down, the batteries can take over and run the fan?
If each pack can run the fan by itself, it seems like your best option is to just run off of one pack unil the sun goes down and that pack's battery runs low, then switch to the 2nd pack's battery.

Alternately, you could build a small circuit to parallel the two packs as voltage sources, with a Schottky diode OR of the two output voltages. Are you familiar with how to make a Schottky diode OR circuit to combine two parallel voltage sources?

https://auvidea.eu/images/auvidea/products/CAN/pdb/Diode_T_366x264.png

1579886849193.png
 
Hi and thanks for the replies. I'm not very versed in electronics, and all of the components i have at my disposal are simple usb plug and play parts. I'm probably going to simply charge one battery while the other runs the fan. Or perhaps run the fan off panels while the batteries charge, then switch at night. I will look into your suggestions and see what I can learn. Thank you!
 
  • Like
Likes   Reactions: berkeman

Similar threads

  • · Replies 18 ·
Replies
18
Views
3K
  • · Replies 7 ·
Replies
7
Views
5K
  • · Replies 31 ·
2
Replies
31
Views
8K
Replies
6
Views
4K
Replies
2
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 8 ·
Replies
8
Views
3K
  • · Replies 31 ·
2
Replies
31
Views
5K