Solar Basics

Start here to learn solar basics the simple way. Understand how solar power works, the key terms (kW, kWh, PSH, PR), system types, and a safe planning checklist before you compare quotes.

Solar Battery Throughput Warranty Explained (MWh Limit): What It Means, How to Calculate It, and How to Compare Quotes (USA)

Illustrated solar battery cross-section with warranty document and energy flow lines representing a throughput warranty (MWh limit)

Battery warranties aren’t just “10 years.” Many include a throughput limit (measured in MWh) that can end coverage sooner if you cycle the battery daily. This guide explains throughput warranties in plain English, shows simple calculations to estimate “years of use,” and gives a checklist to compare solar battery quotes safely in the USA.

Solar PTO Meaning (USA): Permits, Inspection, Interconnection & the Real Timeline to “Permission to Operate” (2026)

Solar permits and PTO process illustration with permit approved clipboard, calendar, net meter, and a home with rooftop solar panels

Solar PTO (“Permission to Operate”) is the utility’s final approval that lets your system legally run on the grid and earn credits. This guide explains each step—permits, installation, inspection, interconnection, net meter swap—plus a timeline table and a delay checklist so you know exactly what’s normal and what to fix.