Key Takeaways
- APsystems was founded in 2010 in Silicon Valley as APS, rebranded APsystems in 2015, and has been listed on the Shanghai STAR Market since June 2022.
- APsystems' EZ1 series is a DIY plug-in microinverter line sold directly to consumers, distinct from the company's commercial-scale DS3/QT2 microinverters built for larger installations.
- The EZ1-M is priced at $325 direct from APsystems' US store and is the only one of the three major balcony-solar microinverter brands with a manufacturer-native local HTTP API, enabled via Bluetooth (Settings > Local Mode) — no cloud account or workaround required.
- A manufacturer-adjacent, open-source Home Assistant integration is built directly against that local API, unlike Hoymiles' and Deye's cloud-first monitoring defaults.
- EZ1 output options include a 799W variant sized specifically to fit Germany's 800W inverter output cap, and APsystems maintains dedicated localized EZ1 marketing pages across multiple EMEA countries.
- APsystems microinverters carry UL 1741 and IEEE 1547 grid-interconnection compliance; no APsystems product has completed UL 3700 balcony-solar-specific certification, an industry-wide gap since that standard launched in January 2026.
APsystems: Company Snapshot
APsystems' confirmed corporate history begins in 2010, when the company was founded in Silicon Valley as APS; it was rebranded APsystems in 2015 and has been listed on the Shanghai STAR Market since June 2022 — a public-listing status it shares with Hoymiles rather than the privately held structure of Growatt. APsystems' core business is microinverter manufacturing across two distinct lines: the EZ1 series, a DIY plug-in product for balcony and small residential solar sold directly to consumers, and the commercial-scale DS3/QT2 microinverters aimed at larger installations. Unlike Hoymiles, whose HMS hardware ships embedded inside other brands' kits, APsystems sells EZ1 directly through its own US store and maintains dedicated localized marketing pages across multiple EMEA markets.
📍 In One Sentence
APsystems is a Silicon Valley-founded microinverter manufacturer, rebranded from APS in 2015 and listed on the Shanghai STAR Market since June 2022, whose EZ1 series is sold directly to consumers with a manufacturer-native local API, unlike Hoymiles' embedded HMS hardware.
💬 In Plain Terms
APsystems makes its own balcony solar microinverter, the EZ1, and sells it directly to consumers rather than only supplying hardware for other brands' kits — and unlike its two main rivals, it works locally with no cloud account required.
Timeline
APsystems' founding, rebrand, and stock-exchange listing dates are verified via Wikipedia and PV trade press: founded in 2010 in Silicon Valley as APS, rebranded APsystems in 2015, and listed on the Shanghai STAR Market since June 2022. This timeline places APsystems' public-market debut roughly 18 months after Hoymiles' December 2021 STAR Market listing and about 14 months after Deye's April 2021 Shanghai Stock Exchange listing, though all three companies are now public. Separately, PromptQuorum's own microinverter comparison research documents APsystems' EZ1-M as having entered direct US retail more recently than Hoymiles and Deye, while shipping hardware built specifically around local, cloud-free control from the outset.
EZ1 Series Output
APsystems lists rated output for each officially listed EZ1 variant, including a 799W option sized specifically to fit Germany's 800W inverter output cap — a market-specific engineering choice not seen in Hoymiles' or Deye's model lineups documented in this research. In the US market, the EZ1-M is priced at $325 direct from APsystems' own store, placing it above Hoymiles' HMS-800-2T-NA (documented at roughly $279–290) and above Deye's SUN600–1000G3, for which no reliable US price was found in this research.
Localized Markets
APsystems maintains dedicated localized EZ1 marketing pages across multiple countries on its EMEA site, the confirmed-markets signal used throughout this profile in place of an itemized country-by-country certification list. APsystems microinverters carry UL 1741 and IEEE 1547 grid-interconnection compliance, the established US standards, but — consistent with Hoymiles and Deye — no APsystems product has completed UL 3700 certification, the newer balcony-solar-specific standard that launched in January 2026 with no certified products industry-wide as of this research. APsystems entered direct US retail more recently than Hoymiles and Deye, but its EZ1-M is now sold directly through APsystems' own US store rather than only through third-party kit resellers.
Where APsystems Sits
The balcony solar supply chain splits into three layers: panel manufacturers, microinverter/battery makers, and kit resellers that package the two into a consumer product. APsystems sits in the microinverter/battery-maker layer, alongside Hoymiles, Deye, Growatt, Enphase, and GoodWe, rather than the kit-reseller layer occupied by Anker SOLIX, EcoFlow, and Zendure. Within that layer, APsystems' EZ1 series is more consumer-visible than Hoymiles' HMS hardware: EZ1 is sold directly to consumers through APsystems' own US store and localized EMEA marketing pages, whereas Hoymiles' microinverters typically reach consumers embedded inside other brands' kits. APsystems' commercial-scale DS3/QT2 microinverters are a separate, larger-installation product line, distinct from the balcony-relevant EZ1 series covered in this profile.
Bankability Ranking
Sinovoltaics' 2025 "most bankable" ranking of APsystems was reported via APsystems' own press page rather than an independently distributed source — a real third-party assessment, but one APsystems chose to publicize itself, which this profile treats as directional rather than independently verified. This is consistent with how this profile treats other self-reported claims: distinguishing a real external ranking from an independently confirmed one, without assuming either accuracy or inaccuracy beyond what the sourcing supports.
Frequently Asked Questions
What is APsystems?
APsystems is a microinverter manufacturer founded in 2010 in Silicon Valley as APS, rebranded APsystems in 2015, and listed on the Shanghai STAR Market since June 2022. Its EZ1 series is a DIY plug-in microinverter line for balcony and small residential solar, distinct from its commercial-scale DS3/QT2 microinverters for larger installations.
Who owns APsystems?
APsystems has been publicly listed on the Shanghai STAR Market since June 2022, following its 2015 rebrand from APS. This public-listing status is similar to Hoymiles, which also lists on the Shanghai STAR Market, and differs from privately held Growatt.
Is APsystems a balcony-solar-kit brand like Anker SOLIX?
Not exactly. APsystems sits in the microinverter/battery-maker layer of the supply chain alongside Hoymiles, Deye, Growatt, Enphase, and GoodWe, but unlike Hoymiles' HMS hardware — which ships embedded inside other brands' kits — APsystems sells its EZ1 series directly to consumers through its own US store and localized EMEA marketing pages, giving it a more consumer-facing profile than some peers in the same supply-chain layer.
What is the EZ1 series?
The EZ1 series is APsystems' DIY plug-in microinverter line for balcony solar, with rated output listed per officially available variant, including a 799W option sized specifically to fit Germany's 800W inverter output cap. It is distinct from APsystems' commercial-scale DS3/QT2 microinverters, which target larger installations.
How much does the APsystems EZ1-M cost and does it work with Home Assistant without a cloud account?
The EZ1-M is priced at $325 direct from APsystems' US store. It is the only one of the three major balcony-solar microinverter brands with a manufacturer-native local HTTP API, enabled via Bluetooth (Settings > Local Mode), and pairs with a manufacturer-adjacent open-source Home Assistant integration that requires no cloud account.
Does APsystems have UL 3700 certification?
No. No APsystems product has completed UL 3700 certification, the newer balcony-solar-specific US standard that launched in January 2026. This is an industry-wide gap — Hoymiles and Deye also have no certified products. APsystems microinverters do carry the established UL 1741 and IEEE 1547 grid-interconnection standards.
Which markets does APsystems sell in?
APsystems maintains dedicated localized EZ1 marketing pages across multiple countries on its EMEA site, the confirmed-markets signal used in this profile. APsystems entered direct US retail more recently than Hoymiles and Deye, but the EZ1-M is now sold directly through APsystems' own US store.
What's the difference between APsystems' EZ1 and DS3/QT2 microinverters?
EZ1 is a DIY plug-in line built for balcony and small residential solar and sold directly to consumers. DS3/QT2 are APsystems' commercial-scale microinverters aimed at larger installations, a separate product category not covered by this balcony-solar profile.
What is the Sinovoltaics "most bankable" ranking APsystems received?
Sinovoltaics' 2025 "most bankable" ranking of APsystems was reported via APsystems' own press page rather than an independently distributed source. It is a real third-party assessment, but a self-published one, which this profile treats as directional rather than independently verified.
How does APsystems compare structurally to Anker, EcoFlow, and Zendure?
APsystems sits in the microinverter/battery-maker layer of the supply chain, alongside Hoymiles, Deye, Growatt, Enphase, and GoodWe. Anker SOLIX, EcoFlow, and Zendure differ structurally by spanning two layers: they manufacture their own battery hardware and also sell packaged kits directly to consumers. APsystems' EZ1 series narrows that gap somewhat by selling directly to consumers itself, though it does not manufacture battery-storage hardware the way Deye or the kit-reseller brands do.