Solar and battery sizer
Array, battery and inverter ranges for your darkest month. Learn the ideas behind it in Lesson 29: Project: load list and solar sizing.
Planning tool
Size an off-grid array for the darkest month and a battery for a run of cloudy days. The results are ranges because real losses vary.
Not sure? See Lesson 3. Data is a teaching approximation for one city per zone.
About your latitude for year-round, steeper for winter.
Cloudy days the battery should carry with no sun. Often 2 to 5.
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A planning estimate, not a design. Take it to a qualified professional before you buy or build.