Use the off-grid category when daily cycling, future expansion, and inverter size matter more than the lowest entry cost.
Off-grid battery projects usually depend on daily energy use, solar charging input, inverter size, reserve capacity, and seasonal conditions. A battery that looks large enough on paper may still be undersized if cloudy weather, freezer loads, water pumps, or winter charging limits are not considered.
Use system planning help when the project includes solar panels, an inverter, charge controller settings, generator backup, critical loads, or code-sensitive installation work. Battery sizing tools are useful for early estimates, but final equipment choices should be checked against manufacturer requirements and qualified professional guidance.