Sam Whitfield

Panel spec sheets list two different warranty periods and most quotes blur them together. Here's what each one actually covers, and where the gap bites.

A high DC/AC ratio isn't a mistake on your solar quote. Here's how clipping actually works, why installers oversize on purpose, and when it's overdone.

Solar quotes love a tidy payback number. Here's what assumptions are baked into it, and why your real payback will land somewhere else entirely.

North isn't always available. Here's how east/west solar splits actually perform, and when spreading panels across two roof planes beats a single north face.

A guide to assessing roof condition before solar, so you're not paying to remove and reinstall panels five years later.

Not all "25-year warranty" claims mean the same thing. Here's how to read panel, inverter and workmanship warranties before you sign a solar quote.

A 22% efficient panel isn't automatically better than a 20% one for your roof. It matters most when roof space is tight and barely matters at all when it isn't.

The three topologies all turn DC panel output into usable AC power. The real differences show up when one panel is shaded, when something fails, and how much per-panel data you get.

A shadow covering ten percent of a string inverter's panels can cut way more than ten percent of the output. Model shading properly before you sign, not after the trees are already blocking your afternoon sun.

Bigger isn't automatically better. Sizing a solar system properly means matching panel capacity to your roof, your usage pattern, and your export limits — not just filling the roof.

A one-page quote listing only total system size and price is missing almost everything that determines whether the install is any good. Here's the itemised detail a real quote actually includes.