Eric Chrisp wrote:If you had the choice to put your resources into either going off-grid solar with battery back-up, or on-grid solar for less than half the money (just 20% of the current electric bill), what would you choose?
We didn't have the resources required to make that choice when we bought our place, but I'd have preferred off. Jan is on point though.
Eric Chrisp wrote:Does it really matter if you are off grid and you live close to a major city?
The pros and cons don't change a whole lot based on your proximity to a major city, imo. If you're close to large groups of people and the grid goes down temporarily, you make a lot of new friends, real fast, if you still have power. If you're close and the grid goes down more or less permanently, you make a lot of enemies if you still have power.
Eric Chrisp wrote:What, given the interesting times we live in, are the relative pros and cons of off-grid versus on-grid living?
If you start a project on the grid, you've got the flexibility to use more than you can generate, to run cheap electric tools and accomplish a lot of one-time tasks quickly. Grid-tied tools are more plentiful, therefore easier to come by used and inexpensively.
If you start a project off grid, you're getting used to living within your means from day one, which is good. But you're probably having to use more battery powered tools, which cost more, and you're still tied to the grid because the grid builds your replacement batteries, expansion panels, controllers, etc.
If you're in an area where the grid has to buy back your excess generating capacity for an attractive price, and you have the resources to install something that meets their standards, then maybe you want grid-tied solar to help offset the installation cost. Don't plan on that arrangement being permanent. A captive regulator can flip those buyback rules around and cut off that kind of cost offset pretty quickly.
So, like most things, it depends. Going off grid is frequently framed either as referendum on the methods the grid uses to generate and distribute power, or a strategic choice about how long you expect the grid to continue to function in your area. Things fall apart. Eventually the grid connected to whatever you're thinking of connecting it to
will permanently cease to function, but without a crystal ball, none of us can say when. If you're building with the intention of passing something on, being grid tied may mean passing on a serious systemic weakness. If the inheritors are aware of the weakness and you pass on the resources or skills to work around it, maybe that's good enough.
Personally I feel like we should be encouraging decentralized generation and consumption to the furthest extent possible for each use case, but the ethical dimension of any decision is always personal, so that's for you to mull over. Knowing where the juice in your grid is coming from may be the thing that sways you away from being tied to it, even with solar. As long as you can flip a switch in an emergency and disconnect yourself from the grid, grid-tied solar still makes strategic sense to me. If that switch isn't automated, and your local substation eats itself, how much damage can that do to your equipment? If your system can be killed by the grid, that's certainly a point in favor of being off-grid from day one.
Practically speaking though, as we age, our society leans heavily on electronics to keep us alive. Who knows what kind of technology you'll feel justified in using, as time goes on? Would you change your resource investment based on that kind of speculation? If you answer "yes", then do you risk falling back on a grid that may or not be there to catch you, or do you build a more robust off grid system that may cost more to maintain? Up to you, based on your understanding of the nature of the grid where you live, and your tolerance for difficult-to-quantify risks. All grids are not created equal.