Engineered Solar vs Catalog/Drop-Ship Solar
Catalog/drop-ship solar uses one-size assumptions that frequently fail in winter or cloudy stretches. Engineered solar sizes the panel and battery to the site's worst-month sun, autonomy needs, and actual load — guaranteeing year-round operation. Engineering costs a little more upfront and prevents the failures that make solar look unreliable.
This comparison gives the buyer's framework.
At a glance
| Catalog / drop-ship | Engineered | |
|---|---|---|
| Sizing | Generic, one-size assumptions | Site-specific worst-month |
| Cost | Cheaper upfront | Slightly more upfront |
| Reliability | Winter/cloud failure risk | Reliable year-round |
How to choose
Choose catalog only for a low-stakes, mild-climate, accept-the-risk job where occasional failure is tolerable. Choose engineered whenever reliability matters — most commercial and municipal work. The reason is concrete: catalog solar ignores the site's worst month, latitude, and load, so the battery never fully recharges in winter and the light goes dark in the darkest stretches — usually after the installer is gone. Engineered solar sizes to the worst month and proves it, costing slightly more upfront and preventing the failures that unfairly tarnish solar's reputation. This is 360 Solar's founding principle.
Frequently asked questions
What's the difference between engineered and catalog solar?
Catalog uses generic, one-size assumptions that fail in winter; engineered sizes to the site's worst month, autonomy, and load for year-round reliability.
When is catalog acceptable?
Only for low-stakes, mild-climate, accept-the-risk jobs.
When should I choose engineered?
Whenever reliability matters — most commercial and municipal work.
Why does catalog solar fail?
It ignores the worst month, latitude, and load, so the battery never fully recharges in winter.
How can I tell a quote is engineered?
It includes a worst-month sizing calculation and photometric report, not just a wattage and a price.
Request an engineered design. Get it at 360solarlighting.com/free-quote.