Gergely Markolt's posts

I think my calculator has nothing to do with politics, but I heard they are going to put solar panels on the White House, that is a good start.

I was trying to find a calculator on the internet what can show me how fast is my system start making money. I have not found any, that is why I created one.

www.solarreturn.info

I know there other more complicated calculators on the internet, but with those you can not calculate if you buy 300 watt panels and an inverter and how many years does it take when your system starts producing money for you. The other ones are try to sell systems and loans and leases this one is for one purpose only.
For example a have got a 125W panel (used) and a micro inverter for $250. So i craeted a formula to find out it takes a around 9 years to get back my investment.

I new in green energy, so I built this small system to test, try out how it works.

It is going to be a storage shed lighting.

2 batteries, 7.5 watt home made solar panel, and one 20 watt 12 volt DC cfl light. 6A charge controller

after this experiment I am going to build a larger system, already started to make a 60W panel.

Thanks,

I have this battery:
http://www.altestore.com/store/Deep-Cycle-Batteries/Batteries-Sealed-Agm/Universal-UB12180-12V-18AH-20HR-Sealed-AGM/p1997/

I don't have any manual for the battery.

Hello,

I got new batteries, and if a I start charging with a solar panel it is not going to be charged full just after few days. Do I need to charge first the batteries full with a battery charger before I can install them? Like a cell phone first you have to charge it for  12 hours.
Thanks,