is almost complete. It has taken over a year to source parts, do research, and finally finish this project with the wife complaining that I was in the garage too much, my wallet thinning out, many hours of research and lots of trial an error.
My initial interest in this project was to have an emergency backup power solution that was of a renewable source. It has since turned into a practical, portable generator that has found some uses besides the original emergency power requirement. I work in the TV/movie industry and needed a solution to power a small set in the field that made no noise, emitted no fumes and was portable. I also wanted a way to have AC power while camping for some creature comforts and the ability to have an inverter that was more powerful than the one that's included in the trim package for my Tacoma.
I started with some panels form Ebay that were made in China but had decent specs and construction. I was looking for at least tempered glass, MC-4 connectors and monocrystalline panels. I bought at 2 different times so ended up with (4) 70 watt panels and a 90 watt panel.
Next was buying Pelican cases and sourcing most of the parts online with a lot of local trips to HD and Lowes and the local electronics shop.
I settled with a Samlex PST UL listed inverter that outputs 2000 watts continuously and peaks at 3500 watts. I already had the Morningstar TriStar MPPT 45 solar charge controller so I bought the digital display readout so I could know more than just looking at a red/yello/green led.
I started by fitting the inverter in the case and getting an initial idea of a layout.
I had to call Pelican to find out anything I could about cutting and drilling into their cases. If you cut or drill their cases it voids the factory warranty and I didn't want to do it wrong. They said their cases are made of 100% pure polypropylene. They said drill and cut slowly and don't melt it.
When I made my 1st cut I was relieved to see that it cut relatively easy at low speeds.
You have to chase all the stringy pieces of plastic with a vacuum as you do this.
The workbench started to look like a mad scientist area and the wife was not happy with the mess.
These 1440 Pelicans are my battery cases
I am using 2/0 battery cable as running at 12 volts uses a crap load of amps to get an inverter to output 2000 watts AC.
I used Concorde Sun Extender AGM batteries for this project because I didn't want hydrogen gassing out of the batteries as I might be using this indoors.
I needed a panel made and I wanted it to be somewhat dummy proof and practical. My local electronics shop has a sister company next door that makes custom LED panels and has laser and CNC capability.
Now I had to wire it all up. Keep in mind every connection is being cut to length, soldered and shrink wrapped.
I had to put in a raised ABS plastic piece for all the buss bars and to have somewhat of power supply section for the controller box.
Mounted the cover in place and bench tested for any faults or shorts.
I decided I wanted a quick disconnect for my power pig tail so I went with Neutrik's Powercon connector.
The solar input is also a quick disconnect connector that locks in place and you cannot install this plug backwards so the polarity will always be correct.
The one thing that I have to be careful is to make sure I hook up main positive and negative correctly or I will fry the solar charge controller and inverter. So I made sure to color code all my cables for positive identification. I am using 8/2 UV resistant tray cable for the run to the panels.
I wanted to build a better tripod mount for my upper array but this what I have parts for right now to start this project.
I'm going in series on all the panels to up my voltage so I can have as little power loss as possible for trip to the charge controller as my total run is about 25 feet.
I had a 1k soft box tungsten light running off the inverter to see how the system acted with a good load. It handled it like a champ. This whole time the cooling fans are running quiet and I'm smiling.
I am happy with the results so far but I do realize I need more panels (watts) and more storage, but this is a portable solution and not meant to be a high amperage long run time generator (unless I keep my load controlled and reasonable for this size setup)
I am working on what I'm calling a baby panel setup and a really portable folding panel setup that I should be getting done this week.
Will post more pics when the baby panel setup is done and report back some real world run time specs.
Thanks to ARFCOM and all the threads related to this and other projects. I have learned a lot here.
-R