Homemade 240W folding solar panels with 300W Turnigy Reaktor

Bit of a ramble showing my experimental 120W solar panels driving a 300W Turnigy Reaktor charger and homemade 48V battery pack comprising 10 x 5.2Ah 6S LiPos, with balancing.

Edit: I later discovered a setting which allowed a minimum input voltage to be set, so I set it to 17.6V and the charger would then try to get as much current as it could but not allow the panel voltage to fall below it. A pseudo MPPT without the T, but good enough!

The charger works really well off the mains or 12-24V batteries, but running off solar panels directly reveals some room for improvement, and should only be a firmware fix.

It works well enough, but needs babysitting – I have to manually set the charge rate to just under the maximum power point current and hope that a cloud doesn’t come along, otherwise the voltage drops into a hole until restarted with a new current setting!

The charger can control the current draw, because it gradually ramps up demand at the start of a charge, but it doesn’t know about Maximum Power Point Tracking (MPPT), so it will continue to take whatever it can get, go right through the panels’ power curve, and if the current draw is too much, the voltage will drop to 10V and stay there.

This could be “easily” solved with a firmware modification to track the Maximum Power Point, but that’s a bit beyond my ability to break in, disassemble and recompile a new OS for it!

Turnigy could expand their market a lot if they could issue a firmware update to handle MPPT, or make a new solar-aware charger.

(I’m sure there are a lot of RC enthusiasts who would like to be able to charge their LiPos in the field, without needing to lug tens of kilos of car batteries around too!)

I tried to use a Victron MPPT charge controller, but it doesn’t do LiPos. won’t work without a lead acid battery connected, and won’t drive the Turnigy because it’s too capacitive! Oh well…
it will however keep a couple of batteries charged that I could use at home to charge the Lipos with, but the idea is to be able to charge the ebike battery on the fly with the panels on a trailer, or anywhere.
(The 7kg 48V LiPo pack contains as much energy as two 55Ah car batteries weighing 13kg each!)

So, I think to be able to make optimal use of the panels, I’m going to either need to find or make a solar MPPT BMS that’ll keep a 12S LiPo charged and balanced, or something simpler that will work as a simple MPPT power suppy of around 400W without any battery management to drive the Reaktor, and manually switch battery banks as necessary.

There are painfully few affordable options on the market with the power required, and believe me, I’ve searched high and low!

Perhaps the best option would be to roll my own using an Arduino Nano and a cannabilized 500W computer PSU, can’t be *that* difficult!

source

Northvolt Builds Europe's 1st EV Battery in a Bid To Beat Tesla Giga Berlin

0
Northvolt Gigafactory produces first lithium-ion battery cell in a bid to beat Tesla Giga Berlin's...

Best Solar Tube Well System 15 Solar Panels 7 5Hp Motor system

0
Best Solar Tube Well System 15 Solar Panels 7 5Hp Motor system source

A Tranquil Drone Video: A Texas Journey – SOLAR POWER PLANT , AUSTIN , SOUTH PADRE , CORPUS CHRISTI

0
I wonderful Travel Destination Aerial views by Drone. Filmed , Edited , and Produced by:...

Installing 2x 270 Solar Panels On Mercedes Minibus Motorhome Conversion Roof

0
In this video I show how I mount 2x large 270w solar panels on the...

Hubble’s Grand Tour of the Outer Solar System

0
From its vantage point high above Earth’s atmosphere, NASA’s Hubble Space Telescope has completed its...

Best Time to go Solar for Texas Homeowners

0
The Texas Solar Investment Credit ends this year. Don't miss out on your chance to...

r/EntitledPeople – Neighbor STEALS My Solar Panels! Gets Mad When I Call COPS!

0
r/entitledpeople a thieving entitled Karen decides to steal a clients new solar panels to try...

The Great Texas Freeze of 2021

0
In February 2021, the temperature in Texas dropped below zero. Not a big deal, right?...

Vivint Solar: Green Business Awards

0
Utah Business is excited to honor Vivint Solar for "Energy Conservation" at the 2016 Green...

Concentrating Solar Power Program

0
Beginning in the 1980s and continuing through today, Sandia has pioneered concentrating solar power technology...

How Much Do Solar Panels Cost? – Debunking A 10 Year Solar Myth | Belmont Solar

0
How much do solar panels cost? Are they really as expensive as everyone seems to...

SunRoof – 2in1 Solar Roof of the Future

0
Learn more about our solutions at www.sunroof.se If you're interested in becoming our global sales or...

Watch This BEFORE Buying Flexible Solar Panels! – ETFE Does Not Last

0
In this quick video, I wanted to show you what your flexible solar panel will...

How is an In Roof Solar Geyser Installed?#

0
This video explains and has good visual affects of how an in roof installation for...

Jinkosolar U.S. Solar Panel Manufacturing Facility Opening Ceremony

0
JinkoSolar held the opening ceremony for its new state-of-the-art solar panel manufacturing facility at 4660...
Advertisment

Latest posts

Go Solar Group's Utah Solar Installs

See some of the best solar installs in the state of Utah, all completed by GSG. source

10 Watt Solar Panel Unboxing and Review (Loom Solar)

Loom Solar 20 Watt - 12 Volt Solar Panel for Home Lighting & Small Battery Charging Loom solar Panel 50 watt - 12 Volt Mono...

Best Solar Panel – Harbor Freight 100 Watt Solar VS Renogy Eclipse Solar

This short video is a comparison of Harbor freights 100 Thunderbolt solar panels verses Renogy's Eclipse 200 watt solar suit case. 200 watt verses...

Electric Bike Co Solar Panel Review – $699

The Electric Bike Company EBC Solar Panel is a lightweight solar panel that is extremely easy to transport and use thanks to the...

California Regulator Talks Solar In San Diego

California's top regulator was in San Diego this week to hear about the state's changing solar energy marketplace. source

Want to stay up to date with the latest news?

We would love to hear from you! Please fill in your details and we will stay in touch. It's that simple!