You can find cheap regulators :
http://www.ev-power.eu/Solar-GridFree/Solar-PWM-Regulator-12-24-V-10A-Input-30V-50V-LS1024E.html?cur=1
It's all about how much and where you invest off course , but even this old article shows how much potential solar power has :
http://www.huffingtonpost.com/michael-graham-richard/can-we-power-the-whole-wo_b_104355.html
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fimages.huffingtonpost.com%2F2008-05-30-solarpowerworldnn02.jpg&t=661&c=6lyK6g7jnPlyGg)
We could have "free" global solar energy
If you google Gobi desert + solar energy you see the Chinese understand that:
https://www.hongkongfp.com/2015/07/13/nasa-images-highlight-the-stunning-growth-of-solar-farms-in-china/
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.imgur.com%2F14CC610.jpg&t=661&c=_nhMQq_HCOTRiA)
![Grin](https://bitcointalk.org/Smileys/default/grin.gif)
I laughed. Yeesssss of course.... A kinetic battery, why not?
Let me just pump 10 pool worth of water over my head, to last the night on my S5
![Tongue](https://bitcointalk.org/Smileys/default/tongue.gif)
Not so crazy : https://en.wikipedia.org/wiki/Energy_storage#Renewable_energy_storage
Thank you all for contribution