solar energy

All-DC Solar Power System in The COMET

Here's a follow up to the last post, where I talked about how to calculate your (kilo)watt usage and shared my own table showing what electricity-using appliances I will have. Here's why that "AC or DC" column is important.

I want to design a PV system for The COMET that is DC-only, and has no AC inverter (which turns the DC power from the panels into the AC power that comes out of your wall sockets). The reason is because of the nature of inverters for PV systems: inverters are the single most expensive component of a PV system. They also are the point at which 20% of efficiency from what the panels are actually producing gets lost. That means it takes 20% of the energy you are producing with your panels to power the inverter. That's a lot of lost energy, especially in a small system! So I am devising a unique system that requires no inverter.

Mobile Solar Electricity with PV

Hey everyone! Happy Monday! So as you may know all last week I was in Vermont attending an intensive photovoltaic design/installation class (at the Yestermorrow Design/Buidl School - check it out here). By the end of the week, I realized it would be very difficult to sum up everything I learned, so I think I'll just get into it little by little. There are so many factors and variables when designing a PV solar electric system for your (tiny) house or mobile house. Weight and stability came up a lot, as well as mobility concerns with roof mounted systems.

For today, I thought it would be fun to introduce you to some of the stuff we covered in the course with an activity you can do yourself. It's really enlightening and will definitely surprise you if you've never really thought about how much energy you use.