Solar Knowledge — Guides & Cost Analyses
Long-form solar guides, cost analyses, and policy explainers. No filler. No affiliate spam. Just the math.
How commercial solar payback varies by building — warehouses, manufacturing, cold storage, retail, and offices — and why load shape and demand charges decide the ROI.
A line-by-line walkthrough of a 700 kW warehouse rooftop solar project: system cost, Section 48E credit, MACRS depreciation, demand-charge savings, and the path to a 5-year payback.
The residential 25D credit ended after 2025; the commercial Section 48E credit didn't. Here's exactly what changed, who can still claim federal solar credits, and how the two compare.
How much do solar panels cost in 2026? National averages, state-by-state pricing, and what drives the cost difference between regions.
The federal residential solar credit ended for expenditures after Dec 31, 2025. What §25D was, why a 2026 install cannot claim it, and how to model savings with $0 federal credit.
Net metering is the most valuable utility policy for solar owners. Here's how the credit works, what 'retail rate' means, and why it varies by state.
Solar batteries cost $10,000 to $18,000 installed. Whether they pay back depends entirely on your state, your utility, and your goals.
Building an off-grid solar system in 2026: panel sizing, battery banks, inverter selection, and what it actually costs to live without grid power.