How do I build a solar powered charger for a laptop with dc rating 19v, 3.42A? I'd also prefer to use some other batteries to store the electricity? How can I accomplish this?
Solar powered charger for laptop
power-backupsolar-panels
Related Solutions
1.) Golf Cart batteries are the easiest supply for a home electric backup battery bank.
2.) Bigger is better with the solar panel array. If you're only going to be running the router (why not the modem too? Or is it combined?) you can probably get away with a cheap small solar kit from these guys : Silicon Solar They offer some great battery charger kits that pretty much take all the work out of it for you. You'd still need to wire these to your battery and convert the current to your AC plug for the router.
3.) For connecting the Router to the power grid you've created in Steps 1&2 you'll need an inverter. Depending on your interest in making something pretty to look at and safe to handle you might want to do some more research on an inverter you can wire to your power grid.
Here's a graphic that should help explain the setup and get you thinking visually on the setup explained above:
In your case the panel box would be replaced with the inverter output device combined as one item since you're only looking to power 1 device.
PV panels are ~15% efficient. Hot water panels are much more, and probably much cheaper.
Way more efficient to just heat the water, rather than convert to electric and then to heat. Maybe with the exception of a heat pump... $$$
Best Answer
A. You will need to calculate your Energy consumption estimations. Let say, for 5 hours a day of average laptop consumption (70W) you will need to produce 450-550w a day (that is 350w plus energy losses on conversion of voltage and losses of battery).
B. For this You will need: 1. Some kind of solar panels 2. A solar charger 3. A battery 4. An inverter
The specification of those element is depend on the strategy that you're planning to apply.
C. There are two basic strategies for planing this system:
You've a lot more to learn before i would recommend you to start spending money on materials.
You can read more here (cost 20$) - and I'm not getting paid for this. i don't even know the writer... i really do recommend this e-book, i have used it myself. and here you can find an full and detailed article i wrote about how to build a solar pv electric system, but it in Hebrew, so maybe try to Google-translate it.
And here two more good pieces of content, from "Instructables":
Hope you'll find this answer useful.