Hoymiles Brand Guidelines: The Hangzhou Microinverter Maker That Listed in Shanghai in 2021

Two co-founders and a microinverter.

Hoymiles is a maker of solar microinverters and storage systems based in Hangzhou, the capital of Zhejiang province in eastern China. The company says it was founded in 2012, launched its first electronics product that year and its first microinverter in 2014. A December 2021 report on the Zhejiang provincial government’s English portal, presented by China Daily, names its co-founders as Yang Bo, then chief executive, and Zhao Yi, then chief technology officer.

The company trades in English as Hoymiles Power Electronics Inc., the name on its own press releases. Its timeline lists the steps it counts as milestones: entry into key overseas markets in 2015, the same year it says it was recognised as a National High-Tech Enterprise in China; a single-phase microinverter serving four panels in 2017, which it calls a world first; and, in 2020, a three-phase microinverter for commercial roofs and its first home storage product.

The listing came in December 2021. Yicai Global reported on 8 December 2021 that the Hangzhou firm had filed its share offering with the Shanghai Stock Exchange, and described it as China’s first stock market listing by a manufacturer of solar microinverters. The company said its shares began trading on the exchange’s STAR Market, the technology board, on 20 December 2021, after a virtual listing ceremony in Hangzhou, under the code 688032. Yicai said the money raised was earmarked for an intelligent manufacturing base, energy-storage inverters, electrical equipment and working capital, and the Zhejiang portal described microinverters and hybrid inverters as the company’s major products at the time.

From one panel to a whole building.

Hoymiles now describes itself as a clean energy solution provider “specializing in module-level inverters and storage systems,” with products for homes, businesses and utility-scale plants. Module-level, in the company’s usage, means electronics that work at the level of each solar panel or small group of panels rather than a whole array. On its website the range runs from the HMS microinverters and the higher-power MIS-W Pro series to the HiBattery and HiOne storage systems for homes and larger battery cabinets for commercial sites.

A newer line is plug-in, or balcony, solar: small sets of panels that renters and flat-dwellers can hang on a balcony or stand in a garden. The company says its microinverters were already being used this way in 2022, and that it launched its first balcony solar and storage product in 2023. In July 2026 it released the HiFlow Pro, a plug-in microinverter designed for the United States market, monitored through its S-Miles Home phone app. In October 2026 the company said the HiFlow Pro had been named to TIME’s list of Best Inventions of 2026.

Its own timeline traces a spread outward from Hangzhou. It says it set up subsidiaries in Australia and the European Union in 2022 and in the United States in 2023, and that a manufacturing base in Mexico began production in 2024. The company says it now has four manufacturing bases and installations in more than 190 countries and regions; its North American press releases carry a Richardson, Texas, dateline.

Much of the brand’s public life happens at trade fairs. Its newsroom for the autumn of 2026 alone records stands at Solar & Storage Live in the United Kingdom, at the REI Expo in India, where it introduced a six-panel microinverter, at a Canadian trade show where it brought the HiOne system to that market, and at All Energy Australia.

How inverter makers present themselves.

Solar inverter makers sell a box that most owners rarely look at. The inverter usually hangs on a garage or utility-room wall, with the panels it serves out of sight on the roof, so the companies that make them tend to show the whole system: rows of modules on a tiled roof, a slim inverter mounted beside the fuse board, and, more and more often, a stack of battery modules standing next to it.

The screen has become as important as the hardware. Inverter makers commonly pair their hardware with a monitoring app or energy management platform, and their marketing leans on phone screens with daily power curves, battery charge levels and the flow of electricity between roof, home and grid. Growatt and GoodWe both describe software platforms as part of their range, and GoodWe linked its 2022 rebrand and the slogan “Smart Energy Innovator” to that shift.

Factories and trade fairs supply the rest of the imagery. Brand imagery in this field also turns to production lines, test benches and new headquarters buildings, while the industry gathers each year at shows such as Intersolar Europe in Munich and its regional editions, where makers fill large stands with inverters, battery cabinets and charging equipment and launch new product lines.

Two of the makers in this guide, Growatt and GoodWe, were founded in 2010, in Shenzhen and Suzhou, and both have since added home and commercial batteries to their inverters. This guide sets out what can be checked about each brand — who founded it, who owns it, where it says its products are made — and marks clearly what rests only on the company’s own word.

Open Energy For All.

The brand’s words have shifted with its products. At the 2021 listing the company described its mission as “making energy smarter” and its goal as “transforming untamed power into smart energy,” and Yang Bo spoke of the listing as a milestone. Today its website opens with the line “Open Energy For All” and a mission to make smart solar “accessible to everyone,” and its newsroom files stories under the banner of “open energy.” The plug-in products carry that message most directly: the company presents the HiFlow Pro as a way to bring solar power to households that cannot fit panels on a roof of their own.

The company presents itself through numbers as much as slogans. Its about page leads with a founding year, more than 2,200 employees, four manufacturing bases and installations in more than 190 countries and regions, and it says more than a third of its staff work in research and development. At the time of the listing it told investors that research and technical teams made up 27.5 per cent of its workforce. Its timeline runs year by year from 2012 to 2025, when it introduced what it calls its new-generation Hi Series of solar and storage products.

That Hi naming now runs across the range, from the HiBattery and HiOne storage systems to the HiFlow plug-in microinverter, alongside older model codes such as HMS and MIS. The company’s sustainability page says its headquarters and factories are powered by green energy, and its marketing addresses four audiences by name: homeowners, business owners, project owners and installation partners.

For a design guide, Hoymiles shows how a component maker can speak to homeowners as well as installers, moving from panel-level electronics to whole-home storage under one plain promise. Compare APsystems, another microinverter maker, and Enphase. For this guide we use a teal, a pale haze and an amber with a sans, an unofficial interpretation; no product or logo is reproduced.

Keep Hoymiles’s identity on hand — save it to a board in the Made Good inspiration library.