1st Run of the Harbor Freight 100watt Kit with Four 12V35AH, 750Watt inverter running a medium fan 

I have 4 of the 35 amp hours Harbor Freight batteries with 8 of the 25 watt panels. Good stuff! Blessings 🙏🏼👍🏼

Good to see that you DID connect the positive and negative cables in an "opposite feed" configuration. By charging/discharging from "opposite ends" of your battery bank, you have effectively balanced the voltage/current loading/charging of your system.... One aspect to consider if/when you may build another system, is to use a 24 or 48 volt battery bank and inverter so as to greatly reduce the voltage drop caused by higher current and with running a higher voltage set up, the wire size doesn't have to be nearly as large in the AWG sizing.... You said you used what you had on hand, but, I "know" that you will want to dick around with building another system and my suggestions to use higher voltage components will reward you with MUCH better efficiency and performance.... Good video....

👍 Excellent demo and video! 👍 I have the smaller single solar panel and a 400 watt for my Dremel carving, but after seeing your setup I think I'll upgrade to a larger 4 panel, 4 battery and the 750watt. I don't draw a lot of power with the Dremel only, but seeing your fan makes me think it would be nice to have a larger modern and more efficient setup that can handle a fan AND other small woodworking tools that can run at the same time and still keep up without hearing the overload all the time.

Great start...! I'll be testing my own trial and error by Friday on my landlord's 5th wheel.

A good rule of thumb is every 100 Watts at 120 volts ac is roughly equal to 1 amp so 100w at only 12 volts DC would be 10 amps so your fan is 2.9 amps at 120 volts ac that would be 290 W roughly. But once you invert it you have to remember that load is being drawn from the 12 V so that 2.9 amps is actually closer to 30 amps DC I would say you should be able to run that fan on high for roughly an hour and a half to two hours with those batteries you have and no input from the solar.

Great video...Just subbed...keep those videos coming!!!

If I'm not mistaken the charge controller came with this kit only does 30A max on either 12v or 24v setting. So it can only parallel plug 2 panel at 12v or serial/parallel to 24v at four panel.

Maybe if the air has a lot of moisture in it one of those fet transistors will pop or if the timing generator is off. You might hear a pop. Its possible. Lucky they are pretty cheap.

I LOVE everything but put a fuse on the output of the batteries please! You dont want to challenge that battery pack to a fire if something somehow gets shorted at the output.

120v at 2.9 amps = 348 watts

You need to double nut those stainless bolts on the batteries,, expansion and contraction cause the m to loosen 😮😮😮 f j b 😊