Aptos Solar MAC-400 Microinverter

The Aptos Solar MAC-400 Microinverter is a high-performance, single-module microinverter engineered to maximize AC power output and ensure long-term system reliability. Designed for seamless integration with Aptos Solar panels and third-party PV modules, the MAC-400 delivers outstanding efficiency, safety, and smart monitoring for both residential and commercial solar applications.

• 400W single-module microinverter for residential and commercial solar systems
• 96.7% peak efficiency and 99.8% MPPT efficiency for superior energy conversion
• Up to 400W AC output—10% higher than comparable models
• Complies with UL 1741 SB/SA, IEEE 1547, and CA Rule 21 standards
• Built-in NEC-compliant rapid shutdown and 6,000V surge protection
• NEMA 6 / IP67 enclosure for all-weather durability
• 2.4GHz proprietary wireless monitoring via AST Cloud platform
• 25-year limited warranty for long-term performance assurance

Compact and powerful design

The MAC-400 is designed to extract maximum performance from high-output PV modules (320W–540W ). With a 1:1 module-to-inverter ratio and peak AC output of 400W, it ensures optimal energy harvesting across diverse solar configurations. The inverter’s compact, lightweight build simplifies installation while maintaining exceptional power density.

Smart monitoring and communication

Equipped with a 2.4GHz proprietary RF communication system, the MAC-400 connects effortlessly to the AST Cloud platform for real-time performance tracking, diagnostics, and trend analysis. This integrated monitoring capability enhances energy management and system reliability, providing installers and owners full visibility into system operation.

Reliability for the long run

Backed by an industry-leading 25-year warranty, the MAC-400 is built with robust components and field-proven reliability. Its IP67-rated, NEMA 6 enclosure protects against dust, moisture, and corrosion, while natural convection cooling ensures silent, maintenance-free operation even in harsh environmental conditions.

Safety and compliance

The inverter features built-in rapid shutdown capability compliant with NEC 2017, 2020, and 2023 requirements, ensuring safe installation and operation. Advanced protection features—including 6,000V surge resistance, arc-fault prevention, and ground fault monitoring—provide comprehensive electrical safety for both installers and system owners.

Fast, flexible installation

The MAC-400 streamlines system setup with separate trunk cables and tool-assisted connectors, making it ideal for both new installations and system upgrades. It supports up to 10 units per 240V branch circuit or 8 units per 208V branch, enabling flexible array configurations that reduce wiring time and balance-of-system costs.

Size

6.46" x 1.16" x 8.86"

Weight

3.86 lb