The Federal Investment Tax Credit is available for off-grid installations. This now includes stand-alone energy storage devices that have a capacity rating of 5 kilowatt hours or greater. See the Homeowner’s Guide to the Federal Tax Credit for Solar Photovoltaics for more information.

Net energy metering will not be available without connecting to the utility grid, so your system will require battery storage to support nighttime energy loads.

Here is a list of qualified contractors to consider reaching out for a proposal, and there are also a wide range of solar+storage applications available online: https://waseia.org/current-members/