by deba168 @ instructables.com:
Welcome to my solar charge controller tutorials series.I have posted two version of my PWM charge controller.If you are new to this please refer my earlier tutorial for understanding the basics of charge controller.
This instructable will cover a project build for a Arduino based Solar MPPT charge controller.
Now a days the most advance solar charge controller available in the market is Maximum Power Point Tracking (MPPT).The MPPT controller is more sophisticated and more expensive.It has several advantages over the earlier charge controller.It is 30 to 40 % more efficient at low temperature.
But making a MPPT charge controller is little bit complex in compare to PWM charge controller.It require some basic knowledge of power electronics. I put a lot of effort to make it simple, so that any one can understand it easily.If you are aware about the basics of MPPT charge controller then skip the first few steps.
Arduino MPPT Solar Charge Controller v3 - [Link]
Photovoltaic cells output boosted with carbon. R. Colin Johnson @ eetimes.com:
PORTLAND, Ore. — Scientists have demonstrated a doubling of the number of electrons produced by carbon-based photovoltaic polymer potentially doubling the efficiency of any solar cell. The process called “singlet fission” produces “identical twin” electrons from a single photon, instead of the normal one, dramatically boosting the theoretical maximum output of solar cells. Instead of loosing energy to heat, an extra electron is produced by the process of applying a polymer solution to an existing solar cell.
“One of the challenges in improving the efficiency of solar cells is that a portion of the absorbed light energy is lost as heat,” lead scientist at Brookhaven National Labs, Matt Sfeir, told EE Times. “In singlet fission, one absorbed unit of light results in two units of electricity via a multiplication process rather than resulting in one unit of electricity and heat as would occur in a conventional cell.”
Print-On Polymer Multiplies Solar Output - [Link]
Solar Impulse plane set to circle world using renewable energy via euronews
A plane powered by the sun, the Solar Impulse 2, has left Switzerland in a cargo flight bound for Abu Dhabi.
Once there, it will attempt a flight around the world, over India and China, taking in Hawaii and the rest of the US before crossing the Atlantic to southern Europe, northern Africa and completing the circle back to the UAE.
“We would like to demonstrate, with Solar Impulse, that we can today achieve incredible things with renewable energies and clean technologies,” explained Dr. Bertrand Piccard, founder of the Solar Impulse project.
“If an aeroplane can fly with no fuel around the world, can you imagine how this technologies could be used everywhere? We have today solutions, technical solutions, to divide by two the energy consumption of the world, and simultaneously create jobs and make profit for the industry,” added Piccard.
Solar Powered Plane Set To Fly Around The World - [Link]
by MidnightMaker @ instructables.com:
This is a Solar Tracker. A full size, internet cloud connected, smartphone accessible Solar Tracker built mainly from 2x4s and plywood, employing wooden peg gears, recycled curtain poles, nuts, bolts and threaded rod. The solar tracker uses a home built electronic controller incorporating WiFi, stepper motor drives, accelerometer and magnetometer. The tracker was designed to drive a full size 90W panel in azimuth and elevation. The gears driving the tracker are wooden peg gears commonly used in the 16th century. The gears were designed using modern 3D CAD (Solidworks). Connecting the wooden peg gears to the internet cloud just seemed like the right thing to do. This is not a waterproof design – you will need to consider modifications to waterproof your derivative design.
Solar Tracker in the Internet Cloud - [Link]
In a bid to bring affordable solar technology to the market by 2017, IBM Research and Airlight Energy (Switzerland) have partnered to produce a solar parabolic dish that can concentrate the sun’s radiation by 2,000 times and convert 80% of it into useful energy. The system is said to be able to generate 12 kW of electrical power and 20 kW of heat under sunny conditions, and will be capable of providing both power and hot water/air conditioning to several homes.
IBM ‘sunflower’ solar concentrator produces energy and hot water - [Link]
This Arduino Nano controlled solar battery charger can charge a standard lead acid 12V battery and runs with 90% efficiency under 70ᵒC (158ᵒF). The circuit can take up to 24V input from the solar panels. The maximum power point tracking is implemented in the circuit by measuring the output voltage and current from the solar panel to get the maximum possible power from it.
Solar battery charge controller - [Link]
Fully Programmable Solar BMS ( Battery Management System ) Learn to program microcontrollers and HW design video tutorials Open Source:
This Battery Management System development board is designed to work with any type of rechargeable Lithium batteries and supercapacitors thanks to fully user programmable parameters.
Whenever you need to use a rechargeable lithium battery you will also require a BMS. Most small device have them integrated like the battery from your laptop, cellphone or cordless power tools (if they use Lithium). Same is true for supercapacitors (EDLC).
Open Source Programmable Solar BMS Li-ion, LiFePO4 dev board - [Link]
In December 2013 Linear Technology announced a new chip – LT8490. This chip includes a 80V Buck-Boost Lead Acid & Lithium Battery Charging Controller that actively finds true Maximum Power Point in solar applications.
No yet available, that chip looks very promising. It operates with input voltages down to 6V and can boost that to charge batteries with higher voltage. I made already a schematic and board design from the preliminary datasheet that charges a 3S LiPo from a solar panel with up to 5A. A small board size allows usage in model gliders with large wing span to charge the battery in flight.
Solar charger with MPPT - [Link]
A solar charge controller regulates the voltage and current coming from your solar panels which is placed between a solar panel and a battery .It is used to maintain the proper charging voltage on the batteries. As the input voltage from the solar panel rises, the charge controller regulates the charge to the batteries preventing any over charging.
Arduino Solar Charge Controller (PWM) - [Link]
The organic solar film producer Heliatek based in Dresden, Germany have announced an improved type of solar cell which gives a transparency of 40 % while achieving 7 % energy conversion efficiency. Although its efficiency is not as good as the company’s opaque organic cells (roughly 12 %) this new solar film can be discreetly integrated into building and vehicular glazing to provide an energy harvesting tinted transparent film. The film is also effective at low light levels and high temperatures where conventional cells lose out.
HeliaFilm uses small molecules (oligomers), developed and synthesized at Heliatek. Oligomers are deposited at low temperatures in a roll-to-roll vacuum process and by changing the spectral absorption properties of the molecules the film can provide different levels of transparency and a colored tint. According to Thibaud Le Séguillon, Heliatek CEO “The transparency of our products is at the core of our market approach. Our HeliaFilm™ is customized to meet our partners’ specific needs, we are a component supplier and this component is a film which can combine transparency and energy generation. This unique combination widens our market potential.”
Organic Solar Film adds Tint and Power - [Link]