New consulting relationship with GreenTecAuto begins
What actually goes wrong with the batteries????
A look at todays Hybrid and EV battery packs
Battery packs exposed
Keeping Warm In New England
Plugging into the SUN
50A 600VAC transfer relay
AC source transfer relay is finished
Adding some new batteries
All weather dish movers
Almost ready to wire things up
Assembling the parts for the load manager
Beating on the system/ use it or loose it
Better solar absorber plate
Better Specific gravity instrument
bringing in the batteries
Burgers are better
California or bust! Solar modified mobility scooter
Canning pot
canning season is here again
Concentrate the heat test #4
Connecting battery bank #2
Cooking some hotdogs
Crappy luck with the weather
Designing a simpler and lower cost solar tracking amplifier
Equilizing the batteries
Everything is working again.
Finally installed
Finally nearing completion of the battery enclosure
multytracker 1
First test
Getting a BIG solar plug
Getting some experience with DC
Getting started on the final wiring
Getting too old to be slinging 120 lb batterys into the rack
Giving the batteries a workout
Hot water tank as energy storage component test 1
Hot water test 2
Identifing the wires, and mounting the Inverter panel
Insulated hibachi reaches baking temperatures
keeping the head cool
keeping warm.
Sue Dabrowski (my better half) makes some solar eggs
Lightning the super fast EV minibike
Looking the data
Main structure of battery rack is finished
Making some stewed tomatoes
making the connection to the existing wiring
making the DC pos buss bars
More improvements to the dish
Multy purpose tracker 1
New tracking amplifier
No more throw away batteries please
Not very encouraging test # 3
Old Rear projection TV lens makes solar furnace
power distribution box fabrication
preparing to connect the big loads
Reading Specific Gravity accurately
running off grid all day
Running on batteries
Second test
Snow melt prep for test 2
Snow melt test one A close look at the process
solar cell adhesion test #1
Solar cells on my Insight ????
Solar cooker gets some wheels
Solar cookout in 20 degree weather
Solarfest 2013
Solarfest is next weekend so it is time to tweak the tools
Solar powered wood burner X-Y stage
Solar powered wood burner focus and lens assembly
Solar teaching toys
Solar tracking with no electronics" Solar Puppet"
Starting the rewiring
The 7 foot circle of sunlight moves to rear deck.
the final high current connections
the finished load center and charge controller connections
the heavy lifters arrive
The new batteries are finally installed and working
The snow is returning???
The snow keeps on coming, need to figure out a good way to keep the panels clear
The sun is dropping 1KW/SQ meter
The transfer relay is wired in and working.
Tracking the sun Big Time
Mikey's solar panel snow sweeper
Vertical and horizontal trackers installed, drive wheel controls
Very interesting heating element
Who pulled the plug?
Wood burning art ?
Yuck, more snow
Making a small solar concentrator
Building MIMA and the plug in adapters
Converting a telephone truck to electric
DIY dual pulse Capacitor Discharge Spotwelder
Chevy Bolt EV joins the family
Getting in shape while making electricity
Replacing gasoline with solar electric lawn equipment
What is Genesis One?
How to stop the aging process DIY
MIMA Install Day 2005 a Big Success!
Building a hybrid car grid charger
Tapping into the Wind
Expanding MIMA with the Distribution board ( users projects )

Concentrate the heat test #4

Concentrate the heat test #4
maximizing the heat

I removed the 60 feet of cable, and re routed it to fill the back of the upper panel.
The cable dissipates 270W, so I figure I have at least 200W under there.
To reduce the heat loss out the back, I put two layers of 1" thick Styrofoam.
The snow melted to slush and then flowed away as water, but the wet heavy snow did not simply slide off in a chunk as hoped. I put a big handfull of snow on the heated panel. It slid about 4 inches, and sat for 5 minutes before sliding to the bottom lip.
In all I ran the heater for 1 hour, and only mostly melted a 3" X 14" X 12" area
Need to get the snow to slide off instead of trying to fully melt it.

It looks like the panels surface has quite a bit of friction at my 26.5 degrees when the snow is very heavy and wet. Will try some rainx to see if the snow slides better on that.

Did some further test and found that if the panel is heated to over 100F, that a hand full of snow will melt immediately and slide right off, due to the thermal mass of the heated panel. With snow on the panel when the heaters are turned on,a much higher wattage would be required, and that will not be a practical, reliable, or economical approach to clearing the panels. A mechanical system may be the best overall solution, as once the sun hits the cleared panel, it will melt off the small amount of snow that remains.