Solar fundamentals
Production, roof fit, costs, and the questions to ask before buying.
Factor C Learning Center
Make energy decisions with better context.
Clear, practical guidance on residential solar, battery storage, and system design. Learn the concepts, understand the tradeoffs, and arrive at every installer conversation prepared.
Analyze My HomeBattery resilience
Backup loads, outage goals, usable energy, and power requirements.
System design
Panel layouts, shading, equipment choices, and proposal comparisons.
Latest thinking
Guides for planning with confidence.
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Turn knowledge into a plan