How to Install Solar Panels with Microinverters


How do you install a microinverter?

[, Music ] our roof is almost perfect for solar right. We’re looking for three things. The first thing is that when you make sure we & # 39, re facing salt, solar cell next 15 degrees off of solar cell, pretty good, almost perfect.

All right all right, second thing: we want to make sure we have the right pitch all right. We want to be between thirty and forty five degrees. You’re talking the pitch of the roof, that’s right. That’s right.

We’re. Thirty, four degrees, perfect. Okay, we want to make sure we have enough pitch to actually shed the snow in the wintertime, all right all right and the third thing is obstructions. All right. We’re on trees and all the other obstructions that are in the way.

In our case, we are above the tree line, so we have very little shading factor. Shade is not good for solar right. Obviously, so how did you calculate all of these things, so I was up on the roof earlier, and this device right here has a Sun.

I, this goes up on. The roof is going to show us how much sunlight actually hits our roof over the course of a year, and what it gives us is this, and this is showing, from 8 a.m. to 4 p.m. four different times of the year, and it’s.

Also going to show the obstruction, did you see that green blob of it, that’s, a tree that’s, giving us some shading to the roof? That’s shade over there right there number we care about! Is the total solar research fraction that tes RF is 88 % for our roof? So what does that mean over the course of an entire year? 80 % of the total Sun will hit that roof 12 % shaded.

So if we were to build this say down on the ground in an open field, exactly how we wanted it, that’s 100, that’s. A hundred and eighty eight’s, pretty good! That’s right! That’s right. We’re very good, so obviously these panels will take sunlight, convert it into electricity and then we’ll ship it down into the barn.

Are we gonna use it there? We’re gonna ship it to the utility. How’s? It work. This is a grid tie system. You’re exactly right, so it’s. Gon na hit the sunlight hits our panels. Anything gets converted into electricity, it’s, then used in the barn right there on-site.

If we need it, if we need it, if we’re, not using it, it spins our meter backwards and that power goes to the grid and it’s used by our neighbors, and we get a credit. We’re. Getting credit for that from the utility exactly and then at night, when the sun’s down and we need electricity.

Where is that coming from our from the roof? But we’re gonna use. Everything from the grid like we always have, okay, and so at the end of the year, we may end up ahead of the game or substantially discounted our prices.

That’s right that’s right and obviously it looks like work is already underway. Yeah, the solar crews started a couple days ago. First thing they did, was they installed stanchions into the roof? Rafters slide them right into the roof.

Rafters. Then they installed a water pipe splash system around the stanchions to make it watertight next thing they put the aluminum racking system that mounts directly to the stanchions last piece of the panels get mounted to those stanchions solar panels, work by taking sunlight and creating two electricity.

They create DC or direct current power. What we need to use in our house is AC or alternating current power, and typically the way it works is the PV panels are mounted up here and they’re strung together in series wired in series down to a central inverter down in the Basement and that’s, what will convert the DC to AC power for us in the house that’s right? The problem with that is that one panel gets shaded one panel malfunctions and knocks out the entire array.

They all get reduced to the weakest link. Really so, if two panels that say over here in this corner are in the shade and they’re operating at what 50 percent efficiency, this whole array drops down to 50 percent efficiency, that’s right.

You’re only as good as your weakest link. No, that’s, not good, not good at all. So in the last five years they’ve come out with micro inverters. This is what one looks like, so this is what’s now converting our DC to AC electricity right one of these per panel, creating the DC to AC power right here at each panel individually.

So you just mount them underneath each panel, that’s right that’s right. The power about this is that they’re wired in parallel. So if one panel get shaded, it doesn’t knock out the entire array. Okay, all right, very simple: to install it’s, gonna mount right to the racking system like this.

Well, that is easy. Huh. It’s. So simple, and so these are the two leads. This is the positive and a negative on the DC direct current side that connects to the solar panel just plug them right in plug them right in yep, two positive leads there, and this is the alternating current.

The AC power that’s gonna be feed to the house, and it connects right here and with those two things connected. That panel is shipping electricity down to our barn, that’s right so Kevin. This is our solar panel.

There’s, gonna be one of 28 up on the roof right. The capacity of this panel is 260 watts all right, and this right here is one of our solar cells. This is a silicon, wafer yeah. You can see there’s, sixty of them and the electricity that’s generated travels on these wires back down to the main bus and now to our positive and our negative leads that get connected to our microwave burner.

Perfect, a little moist right here is this one ready to go up it is, it is, send it up: [, Music ]. We start at the roof Ridge and work our way down. That way. We’re using the rails to support our feet.

We place the solar panels on the racks. Then we make two connections. So the DC leads where the panels are held by four bolts: [ Music, ] raus, nice job. We got 28 panels installed what’s next, so we get a couple things left.

We’re gonna bring some wires down from the roof into the barn yeah. I’m gonna make some final electrical connections and then we have to get an electrical inspection and then we’re up in line [ Music ]