What self-sufficiency can solar + battery achieve?

Solar alone achieves 30–50% self-sufficiency for a typical home. Adding a 10–15 kWh battery improves this to 70–85%. Full 100% self-sufficiency typically requires oversizing by 3–4x.

Is 100% solar self-sufficiency economical?

Rarely. The last 10–15% of grid independence requires disproportionately large battery banks. Most economic optimum is 70–90% self-sufficiency, keeping grid as backup.

How does seasonal variation affect self-sufficiency?

Summer months may achieve 90–100% self-sufficiency while winter may drop to 20–40% in temperate climates. Annual average is the relevant metric for financial planning.

Solar + Storage Self-Sufficiency Calculator

Calculate the percentage of your electricity needs met by solar + battery storage. Model self-consumption rates and grid independence for different system sizes.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)

σy — Normal Stress Y (MPa)

τxy — Shear Stress (MPa)

⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.

How to Use

Enter the values for the patient or scenario you are assessing. Calculate the percentage of your electricity needs met by solar + battery storage. Model self-consumption rates and grid independence for different system sizes. Use the solar self-sufficiency result to inform your clinical assessment.

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Solar + Storage Self-Sufficiency Calculator

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Frequently Asked Questions

What self-sufficiency can solar + battery achieve?

Is 100% solar self-sufficiency economical?

How does seasonal variation affect self-sufficiency?