Category: Home Power

Back in 2014, my wife and I installed a 9 KW solar system. The system is an off-grid with battery backup. After about 18 months of use we do like the system, despite the cost and complexity of installation. I spent about a year doing research on which type of system best met our needs and settled on a grid tied system with battery backup, since it would give us the ability to use grid or off-grid power. With most grid tied-only systems, you will be outta luck once SHTF; grid-tied-only systems shut down as a safety precaution. The off …

Hugh, The largest draw on your power is for the refrigeration of both you and your food. These guys have some interesting solutions that are direct connect DC. They seem to be fine folks, but the solutions are pricey. Danzer makes an interesting refrigerator that runs on 24 volt. I get the idea from numerous articles that you really should not have just one solar system in your house. I have bought components and run my Ham radio off a panel and a couple of deep cycle batteries, but I have a long way to go. www.wholesalesolar.com has some great …

Editor, I found KK’s recent letter interesting in that he, as an experienced solar installer, recommends DC coupled systems. In particular, I would like him to expand on how his clients cope with using DC rather than AC on their properties and how and where they buy DC appliances, tools, pumps, et cetera. I understand that battery-powered electronics and tools are ubiquitous and well tested, but in general the batteries have voltages from 1.5 to 18 volts or so and the chargers accommodate that by plugging into 110 volt AC. Do his clients use small point load inverters for this? …

HJL, I believe R.V. and Expat are referring to AC Coupled inverters. I’ve installed hundreds of offgrid solar systems from 300 to 30,000 watts and I have never used an AC coupled system for an offgrid install. Mainly because it requires more fancy equipment and customization. I don’t feel it gives my customers a good value; it is more complex and less durable. That’s not to say there are not scenarios where it may be the better choice, especially if you are grid tied and net metering. If your readers are interested in the technology, search for “AC Coupled Battery …

Hugh: It seems straightforward to accumulate the beans, bullets, and band aids, and this site has been a tremendous help. However, solar power seems formidable. Every article I read quickly devolves into talk of how to wire and link things, amps, voltage, et cetera. I am an older professional woman with no mechanical expertise, but I do know that electricity can be dangerous, and I hesitate to do these things myself. It would be a tremendous help if someone could write an article listing simple plug-and-play systems that could be purchased from reputable companies. If they could do it by …

Editor, As a full time user of off-grid power I’ve a few quibbles with this article. One is the casual reference to rooftop solar panels. Solar panels get dirty-fast. Solar panels in general are not all that wonderful in generating concentrated energy and dirty panels generate far less than optimal. They need to be cleaned with a soft brush and hose often. In northern parts snow sticks to panels real well and then generate nothing. Unless you have a widows walk installed below the panels, don’t even think about installing them on high roofs. Anything that gets in the way …