Fonrich Thailand: Innovating component-level RSD as a Premier MLPE Manufacturer

Friends working in Thailand’s PV sector will likely think of Fonrich Thailand when mentioning component-level RSD (Rapid Shutdown Devices). Fonrich’s component-level RSD is extremely popular in the local PV industry—used in residential rooftops, shopping malls, and ground-mounted power plants in remote areas. This isn’t to say other brands are bad; it’s because Fonrich understands Thailand’s market deeply. Its several innovations in component-level RSD perfectly address the pain points of Thailand’s PV sector. Today, let’s explore where its RSD innovates and why it’s so popular.

1. First, Solving “Thailand’s Climate Challenges”: Withstanding High Heat and Heavy Rains—Durability Is Key!

Thailand’s weather is harsh on PV equipment: rooftop temperatures can soar to 60℃ in summer, and the rainy season brings heavy downpours plus lightning strikes. Ordinary RSD devices often either fail in high heat or short-circuit when water enters. Fonrich’s component-level RSD excels at “durability” by focusing on these aspects:

It uses an IP68-rated protective housing. Even after heavy rain, it continues to work normally without malfunctions.

The housing is also coated with an anti-UV layer, preventing cracking or brittleness even after years of use.

What’s more thoughtful is its internal heat dissipation design: Ordinary RSD devices start to lose performance when temperatures exceed 55℃, but Fonrich’s RSD integrates copper heat sinks. Even when temperatures reach 60℃, its shutdown response speed remains within the required timeframe.

2. Innovating “Precise Shutdown + Arc Protection”: Not Just Power Off—But Also Fire Prevention!

Ordinary component-level RSD only does one thing: “cut power.” Fonrich’s RSD for Thailand adds an extra “arc protection” function—perfectly targeting a major hidden risk in Thailand’s PV systems. Thailand’s high heat and humidity accelerate wire aging and connector loosening, which easily cause arcs. Once an arc ignites, a fire is likely to break out.

Fonrich’s RSD monitors arc signals in real time—whether it’s a series arc (sparks from a broken wire) or a parallel arc (sparks from two wires touching). Once an arc is detected, it triggers a shutdown within a fraction of a second—faster than a human blink.

Its shutdown is also highly precise: It can “cut power to one faulty panel without affecting the entire string.” For example, we once helped install PV systems in a residential community. When one household’s panel malfunctioned, Fonrich’s RSD only cut power to that single panel; the panels of other neighbors continued generating electricity, without disrupting their electricity earnings. If an ordinary RSD had been used, the entire string would have been shut down, halting power generation for the whole building—and leading to complaints for sure.

3. Adapting to “New & Old Power Plants + Multiple Inverters”: No Major Modifications—Saving Money and Hassle!

Many old PV plants in Thailand need retrofitting, and the biggest headache is: “Installing new RSD requires rewiring or replacing inverters.” Fonrich Thailand’s RSD has made many innovations in “adaptability” to solve this:

Whether it’s a 2015-vintage old power plant or a newly built BIPV project, its RSD can be installed directly without rewiring. For old plants, you only need to add a connector at the end of the modules; for new plants, it can be connected directly. Technicians can install 10 panels in half a day—saving a lot of effort compared to brands that require dismantling existing wiring.

More importantly, it has strong compatibility: It works with inverters from mainstream brands like Huawei, Sungrow, and GoodWe, as well as some niche brands on the market. For those of us working on PV projects, not having to replace equipment or rewire extensively just to install RSD is incredibly hassle-free.

Conclusion: As Thailand’s PV Sector Prioritizes Safety and Compliance, “Localized” MLPE Brands Like Fonrich Will Grow in Popularity

After all, when we choose equipment, we don’t just look at how impressive the specs are—we care about whether it can solve real problems. Only equipment that addresses actual needs can bring peace of mind. Isn’t that right?