I was having a bit of a difficult time understanding the requirements on the electric panel when a solar PV system is connected. I was under the impression that my 100 Amp service wouldn’t meet code requirements, but I wasn’t sure why.
Well, here is the story. NEC 690.64(B)2. That is the section of the National Electrial Code.
The concern is that you can’t have a situation where the utility current (100Amp) plus the solar array (30 Amp) is more than 120% of the rated capacity. Well 100+30=130 which is more than 100 X 1.2 = 120 so that doesn’t work. And it makes sense.
So here is the panel I think I’m upgrading to: My New Ann Arbor Load Panel (Note that this panel is also being set up for generator interlock and that is the topic of that particular article.)
Mounting a bunch of PV panels on a shingle roof and guaranteeing it won’t leak. That is the job. A lot of companies that sell the panels don’t seem to focus much attention on this, but with my homeownership and home buying background I know it is super critical.
I’m collecting a couple of the products I’ve seen mentioned here:
This link takes you to a free download available of the NEC as it relates to solar electric power projects. If you are really going to generate power, you need to do it safely. And there is a reason the code provisions exist.
Energy renewable solar power has many positive advantages in every day life, more than you might think. Newer power companies,are starting to understand that solar power can be an affordable alternative to plants that use valuable resources like coal, natural gas and petroleum, and far less dangerous than nuclear. Not only are the initial Continue reading Solar Power – Energy Renewable Solar→
Ok so you might find the next few links interesting. These are from around the web, just random snippets that I’ve picked up in my reading, but I found some very cool information in them. You might too. Here goes…
Most of us are familiar with the concept behind the wind farm as a means to generate sufficient energy to power the needs of urban environments. Solar power technology has lagged behind in this field, as it was better suited to smaller installations.