Everything important starts with a small step – or in the case of solar energy, a small component.

With solar inverters playing a crucial role in energy conversion, their design and function are vital to the effective operation of any solar photovoltaic (PV) system. An often-overlooked component within the larger solar energy setup is the relay.

But what exactly is a relay?

Simply put, it is a safety component within a solar inverter. It works as an electrical isolation switch that isolates the power of the DC side and the AC side in inverters.

Its main function is to interrupt the circuit if any irregularities occur. This interruption helps to prevent any potential damage to both the solar inverter and the grid.

Hoymiles’ relays: Reliable and compliant

Safety, reliability and compliance are at the core of every product designed by Hoymiles. Our microinverters embedded with relays are no exception.

They are built to meet the rigid specifications of European standards IEC62019-2-2011 and EN50549-1:2019, and German regulatory standards VDE-AR-N 4105-2018, bringing you a product that’s locally compliant and ready to serve.

When you invest in a Hoymiles product, you receive a device designed with an emphasis on safety and efficiency, as we aim to provide you with a reliable system for your solar energy needs.

Staying compliance-ready, we’ve got you covered for safety, efficiency, performance, and durability.

What makes Hoymiles’ internal relay reliable?

Our relays satisfy the stringent specifications of the German regulatory standards, making our microinverters a compliant and powerful ally in your renewable energy journey.

Here’s what makes our relays stand out:

• Heat resistant: Our relays are rigorously tested to ensure their durability and performance. They are designed to be able to be switched on and off over 30,000 times while operating under a temperature of 85℃, which is notably higher than the usual temperature within a microinverter. This combined test of endurance and temperature resistance implies a lifespan of 205 years.
• Stress free and impact resistant: External impacts aren’t a worry for our relays. They can endure physical stressors while maintaining peak functionality, ensuring that your solar power will continue to flow.
• Steadfast and unshaken: Our relay design and testing process is meticulous, with a focus on long-term durability. We take into consideration the possible shocks and impacts that the relay might experience over the microinverter’s extended 25-year warranty period. Therefore, our relays are tested against a variety of frequencies and movements to ensure their robustness.
• High electrical stress point: Hoymiles’ relays can easily handle any overcurrents or overvoltage. They can withstand high electrical stress while ensuring your solar energy can carry on powering smoothly.

At Hoymiles, we choose the best-known brands as we aim to make the journey to renewable energy easy, efficient, and exceptionally safe. Ensuring you get the best from your solar power system, day in and day out.

Why go internal? The Hoymiles advantage

Our choice of an internal relay is intentional and strategic.

Choosing an internal relay over an external relay  offers a number of potential advantages, including:

• Enhanced strength
• Increased reliability
• Improved safety

Firmly welded to the PCB, our internal relays are designed for longevity. There is no need for external components that are time-consuming and costly to install and there are no aging-related concerns. So you’re left with a device that’s safer and more reliable.

Moreover, the design of our microinverters includes a potting compound that fills the device, providing the relay with the same IP67 enclosure rating as the microinverter itself. This effectively safeguards the relay from pollutants and extends its lifespan.

This clever design brings plug-and-play simplicity to your solar PV installation, saving you time and effort.

Safety is our number-one priority

Safety is a paramount concern at Hoymiles. It’s an integral aspect that influences our design and manufacturing processes.

Our products are more than just high-performance pieces of technology – they’re the trusted guardians of your solar journey. Our internal relay is a prime embodiment of our commitment to our customers.

Meeting all the essential criteria – safety, longevity, local standards – our relays are designed and built to keep serving you reliably day after day, year after year. It’s not just about ticking boxes for us, it’s about providing a piece of technology that brings you peace of mind and value that just keeps on giving.

We practice full transparency when it comes to our design choices. The decision to use internal relays stems from their role in helping to ensure component safety and compliance in our products.

The decision wasn’t made on a whim. Instead, it was the result of meticulous research, careful evaluation, and a constant quest to deliver the very best to our customers.

Internal relays: The sensible choice

Hoymiles focuses on compliance and excellent product performance.

In a rapidly evolving technological landscape, it’s easy for businesses to lose sight of what matters most. At Hoymiles, however, our guiding light remains unaltered: the safety and satisfaction of our customers – as well as their ability to remain compliant.

This enduring dedication to safety, reflected in the design of our internal relays, ensures that every Hoymiles product is not just a purchase, but a smart investment in your safe and efficient solar journey.