You know the job. The sun's out, the roof collectors are hot to touch, but the shower goes lukewarm by early evening. The panel, the tank, or the booster are often blamed first. In a lot of Australian systems, the actual decision-maker is the small controller mounted near the tank or in the plant area. […]
You're usually looking at the roof, the tank, or the booster when hot water performance drops. Fair enough. They're the visible parts. But in many Australian active systems, the part deciding whether the whole setup works properly is a small wall-mounted box that often goes unnoticed. That box is the solar hot water heater controller. […]
