We are a community of installers and owners that specialize in off-grid solar. We subscribe to value-engineering in pursuit of cost-effective off-grid solar power.
Now is a great time to move forward with a project. Our batteries require a 6 week lead time. If you install by the end of the year, you can claim 30% tax credit on this year's taxes. So you really do want to get going right now if you pay alot in federal taxes. Otherwise, 2019-2021 are all good years
Our system does not run in parallel with the grid, but rather creates its own micro-grid when in operation. This is just the same as a "automatic transfer gas generator" and sometimes it is useful to describe it as such to your permit authority. With the exceptions of our grid-tie product line, our systems are protected against backfeeding the grid by being unable to output any power on the grid connection at all! If you need the grid power for any reason, such as a cloudy day with a small battery bank, you will automatically switch back over to the grid as needed. While your systems will share a "neutral" line, you will not be able to export any power backwards and there is no reason for the utility to install a special "net-meter". We cannot tell you for certain that you will not need an interconnection application with your grid authority, even though the battery inverter is on an automatic transfer switch.
Our systems are DC-coupled, with multiple solar circuits that provide at least 2x MPPT to acheive double redundancy while using the least number of parts philosophy. This means something can go wrong with one solar panel, and the rest of the array remains productive. However, we do not have double redundancy with our inverter. The inverter has a bypass, so you can always power your home with grid or generator power. But designing with two battery inverters instead of one becomes quite costly. It is more cost-effective to buy a single replacement inverter and so we design our system to make that maintenance task quick and easy.