2026年10月22日

Before a first order, ask a solar water heater factory about proof of manufacture, certification, testing, samples, terms and spares. 20 questions to ask.

Thermosyphon or split solar water heater? Compare freeze protection, roof load, parts, service and certification, and choose the right system to stock.

How a solar hot water split system works: collector loop, pump station, controller settings, freeze protection, sizing and when to specify one.