All off-grid systems must be designed “backwards”, from the “loads” to the “source”. This is somewhat different from the approach for grid-tied systems, where consumption is moderately known, and a goal can be established to offset the percentage of consumption as desired by the client.. and their available budget.
For off-grid designs, loads are a best-effort approximation. The greater the error in that approximation, the greater the error in the system design. If you over-estimate your energy consumption needs, the system will be larger than required. In that case, you’ll have spent more money than necessary, at least up front. That’s not entirely bad because of a condition called “load creep”. No matter what the initial loads and energy requirement, it always goes up. If the system is over-sized initially .. you may eventually grow into it.
The opposite of over-sizing is (of course) under-sizing. This is the more difficult of the two situations to correct, and what we try diligently to avoid. Over-sizing costs more, but will meet your load requirements. Under-sizing means the system won’t do the job intended. That said, to do a reasonable job of designing a system to meet your requirements means a lot of initial homework on your end.
We’re ready to join you on your journey to build that off-grid cabin or tiny home you’ve always dreamt of! Work with us on a fully-detailed engineering analysis and a custom build out if you’re in our service territory.