Step 4: Equipment
Inverters
When setting up your off-grid power system, don’t buy the cheapest inverter that you can find on Amazon! There are several excellent inverter manufacturers out there. I have some that I love, some of them are okay, and some I will not install. Keep in mind, as a professional installer, my reputation is at stake on every project I put in. There are some cheap ones that may perform well, I can’t go there. Some of the “good stuff” out there can power your retreat, automatically start and stop the generator based on battery status, and be tied into the ‘net. I know, some people don’t like that option, but on my end, I can monitor my projects, and even tweak them without leaving my office.
Whatever you do, make sure it is a pure sine wave inverter. They are more efficient, and your equipment plugged into them will last longer. Be careful of the cheap junk available on the ‘net. I have seen an 8000 watt (rated) 12-volt inverter in person. It said it needed to be fused at 200 amps. Simple math folks, power(W)=current(I) x voltage(E), so W=200 x 12, power = 2400 watts. What kind of alien technology are they selling you for the low cost of just $249, that it can output triple the power input?
My business is totally off-grid, powered by an old-school Outback Power Systems FX series 2000-watt inverter. It powers my air conditioner in the summer, and powers my pellet stove all winter. My house has a Magnum Power Systems PAE4448 that I took in on trade a few years back when a customer upgraded to an Outback GS8048 Radian. It backs up our several deep freezes and refrigerators. It will soon power the fan for my LP furnace, and the wife’s freeze dryer. I also have a twelve-year-old Xantrex Pro Sine 1800 that was in the house for a few years, then was bumped out to my shop for several years. Now it is in one of my service trucks. One of my work trailers has a little Morningstar 300W unit, which is fine for running tool chargers, lights, radios, etc. None of them have ever missed a beat.Continue reading“Cutting Your Power Utility Cord, by Dennis Williams – Pt. 2”