What SAJ does

SAJ, legally Guangzhou Sanjing Electric Co., Ltd., is a Chinese manufacturer founded in 2005 that designs and produces solar inverters, hybrid inverters, energy storage systems, microinverters, EV chargers, variable frequency drives (VFDs), and pump controllers. The company operates two business segments — Smart Energy Solutions (Residential and Commercial & Industrial) and Industrial Automation — and reports 1,001-5,000 employees, 25%+ R&D headcount, 294 effective IP rights, and 7.2 GWh of annual energy storage production capacity. Its hardware portfolio spans residential all-in-one systems (HS3, HS2, EK90 HS5), C&I storage (CHS2, CM2, CH3+CB3), hybrid and string inverters, batteries (B2, B3, CB3), microinverters (M2), grid-tied inverters (R5/R6/C6), EV chargers (Caro, CU2), and a broad VFD lineup (MC/VM series, PC/PD/SC pump controllers).

The technology platform is anchored by the elekeeper Energy Management System (EMS), which embeds the proprietary AI Saving 2.0 decision engine integrating generation, load, and electricity-price forecasting with intelligent scheduling across three operation modes. SAJ claims the world's first C&I distributed hybrid inverter on a 1500V DC voltage platform (CHS2/CH3), supporting 50% more PV panels per string and 200% PV overloading capability. MPPT efficiency of 99.8% is reported for solar pump controllers and millisecond-level grid switching (<20ms) for C&I hybrid inverters. The HS3 6-in-1 product integrates PV inverter, EV charger, storage inverter, battery, backup power, and EMS in a 17cm ultra-slim unit with built-in fire suppression and -30°C operation capability.

SAJ monetizes primarily through hardware sales across Residential, C&I, Industrial Automation, and Agriculture/Water Management segments, with a complementary subscription/recurring revenue stream from the elekeeper EMS platform. Go-to-market combines wholly-owned regional entities (Italy, Spain, Germany, Netherlands, Belgium, UK, US, Australia, India, Brazil, South Africa, Kenya) with a global partner/distributor program, supported by exhibition-led demand generation (Key Energy, EESA, Intersolar, Solar & Storage Live Africa, Kenya Clean Energy Week) and digital/email/social channels. The company serves 85+ countries with no named enterprise anchor customers on record.

Name

SAJ

Legal name

Guangzhou Sanjing Electric Co., Ltd.

Website

https://saj-electric.com

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

SAJ is a Chinese manufacturer founded in 2005 that designs solar inverters, hybrid energy storage systems, EV chargers, and variable frequency drives, serving residential, commercial, industrial, and agricultural customers across 85+ countries through regional subsidiaries and a global distributor network.

Ownership category

akta.pro rank

Product category

Solar Inverters and Energy Storage Systems

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

Solar Inverters, Power Optimizers & MLPE Manufacturing (EUAMAHAB)

akta.pro secondary industries

EV Charging as DER (Managed Charging, V2G/V2B) (EUAMAJAL), Home Energy & EV Charging (HEMS, Smart Meters, Batteries, Chargers) (HSAPAQAF), Distributed Generation (DG) Solar & Small Wind (EUAMAJAD), Renewable Power Electronics & Advanced Inverters R&D (SiC/GaN, Grid-Forming, HVDC Converter Tech) (EUAMAOAF)

Keywords

• Solar inverters
• Hybrid energy storage
• Variable frequency drives
• Solar pump controllers
• EV chargers

Headquarters

HQ city

Guangzhou

HQ country

China

HQ region

Asia

Offices12 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Technology or R&D, Operations, Infrastructure, Marketing or Sales

Revenue model

1. Smart Energy Products: Sale of solar inverters, hybrid inverters, energy storage batteries, microinverters, and EV chargers for residential and commercial applications
2. Industrial Automation Products: Sale of variable frequency drives (VFDs), pump controllers, and industrial automation solutions
3. Smart Energy Management Services: AI-powered energy management platform (elekeeper) for optimizing energy consumption and savings

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

SAJ designs and manufactures distributed solar inverters (grid-tied, hybrid, and microinverters), all-in-one residential and commercial & industrial (C&I) energy storage systems, lithium batteries, EV chargers, variable frequency drives (VFDs), and solar pump controllers, all coordinated by its proprietary elekeeper energy management platform with AI Saving 2.0. The offering targets residential homeowners, C&I businesses, agricultural operators, and industrial motor-control buyers across 85+ countries through regional offices, distributors, and an e-commerce portal.

Product overview

SAJ (Guangzhou Sanjing Electric Co., Ltd.) is a smart energy solutions provider offering two main product categories: Residential and Commercial & Industrial (C&I) Smart Energy Solutions, and Industrial Automation. The smart energy portfolio centers around the elekeeper Energy Management System (EMS) platform with AI Saving 2.0, which orchestrates a comprehensive range of products including: all-in-one energy storage systems (HS3, HS2, EK90 HS5, CHS2, CM2, CH3+CB3), hybrid inverters (H2 Series with LV/HV variants), batteries (B2 LV/HV, B3, CB3), microinverters (M2), grid-tied inverters (R5, R6, C6), EV chargers (Caro, CU2), and smart accessories (eManager, ATS, SBU, Smart Plug, Data Collector). The Industrial Automation division provides Variable Frequency Drives (VFDs) including Pump Control VFDs (PC20-PC40, PDH30, PDM30, PDG10), General Control VFDs (MC20, MC30, VM1000B, VM600G), and Solar Pump Control VFDs (SC10, PDS33, PDS51) for industrial motor control and water pumping applications. The platform integrates these products for residential, commercial, agricultural, and industrial use cases with AI-powered optimization, forecasting, and automated energy dispatch capabilities.

Differentiator

Problem solved

Functional benefit

Brands

• elekeeper: Smart home energy management system (EMS) platform for residential and commercial energy monitoring, AI-driven optimization, and energy cost savings.
• AI Saving 2.0

Products and services

• elekeeper Energy Management System Smart home/site energy management platform that monitors and orchestrates energy generation, storage, and consumption in real time, with AI-optimized scheduling, peak shaving/valley filling, and remote control. Targets residential and C&I customers seeking energy-cost optimization and whole-system dispatch.
• HS3 Series Smart Home Energy Storage System All-in-one residential solar-plus-storage-plus-EV energy storage unit combining PV inverter, EV charger, storage inverter, battery pack, backup power, and EMS into a 17cm ultra-slim form factor with millisecond switching and cold-climate operation. Designed for residential prosumers and installers seeking simplified, integrated home energy systems.
• HS2 Series Residential All-in-One Energy Storage All-in-one residential hybrid energy storage combining PV inverter, battery storage, and smart energy management for grid-tied and backup home solar installations. Designed for homeowners and installers wanting a simpler integrated alternative to separate inverter+battery setups.
• EK90 HS5 Series Residential All-in-One Energy Storage High-performance residential all-in-one energy storage system with advanced power conversion and battery management capabilities for whole-home solar-plus-storage applications.
• H2 Series Hybrid Inverter Residential hybrid inverter available in LV, LV Split Phase, and HV Split Phase variants supporting grid-tied and off-grid operation with seamless switching for home solar-plus-storage systems.
• M2 Series Microinverter Module-level microinverter providing optimized DC-to-AC conversion for individual PV modules, enabling panel-level monitoring and performance optimization for residential solar.
• R5 Series On-grid Inverter Grid-tied PV inverter for residential applications converting DC power from solar panels to AC for home use or grid export.
• R6 Series On-grid Inverter Advanced grid-tied PV inverter with improved efficiency and features for residential solar installations.
• Caro Series Residential EV Charger Residential EV charger enabling electric vehicle charging integrated with home energy management and storage systems for prosumer homeowners.
• CU2 Series EV Charger for HS3 EV charger designed specifically for integration with the HS3 home energy storage system for seamless home solar-storage-EV charging.
• CHS2 Series C&I All-in-One Hybrid Energy Storage Commercial & industrial all-in-one hybrid energy storage system combining power generation, conversion, storage, and consumption with self-consumption, time-of-use, backup, and diesel-generator integration capabilities for businesses.
• CM2 Series C&I All-in-One Battery Energy Storage System Smart C&I all-in-one battery energy storage system (BESS) with flexible capacity expansion and multi-unit parallel connections for diverse commercial and industrial applications, with a published 99.9% system availability.
• CH3 + CB3 Series C&I Energy Storage System C&I distributed hybrid inverter (CH3) plus modular battery (CB3) on a 1500V DC platform supporting 50% more PV panels per string and 200% PV overloading, with optional air/liquid cooling for diverse C&I installations.
• CH2 Series 50kW Hybrid Inverter 50kW hybrid inverter for small-to-medium C&I projects with seamless on/off-grid switching and direct diesel-generator connection capability.
• C6 Series C&I String Inverter Commercial and industrial string inverter for PV installations, converting DC power from solar strings to grid-compatible AC for larger commercial sites.
• PC Series Pump Controllers Family of pump controllers (PC20, PC30, PC40, PDH30, PDM30, PDG10) using variable-frequency-drive technology for residential, C&I, and industrial water-system applications including backpack and cabinet-mounted form factors.
• MC Series Variable Frequency Drives MC20 multifunction and MC30 high-performance variable frequency drives for general industrial motor control applications, with energy savings of 30%+ over constant-speed motors.
• VM Series Variable Frequency Drives VM1000B high-performance and VM600G compact variable frequency drives for space-constrained and demanding industrial applications, with 95% industrial-motor compatibility.
• SC10 Solar Water Pump Controller Off-grid solar water pump controller operating independently from grid power for agricultural irrigation, water supply, and remote pumping applications.
• PDS33 Cabinet-Mounted Solar Pump Controller Cabinet-mounted solar pump controller with 99.8% MPPT efficiency, automatic start/stop, and optional 4G remote monitoring for agricultural irrigation and industrial water supply.
• PDS51 High-Protection Solar Pump Controller High-protection solar pump controller for demanding environments and applications requiring enhanced durability and weather resistance.

Quantifiable outcome

• 99.8% MPPT efficiency for solar pump controllers
• +5 more outcomes

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability7 records

Feature5 records

Partnerships

One partnership is on record.

• Tran Le (Vietnam)coreStrategic or Co-development Partner · 13 February 2025Strategic cooperation agreement signed in February 2025 for 100 MW capacity. Tran Le is a leader in Vietnam's new energy sector since 2015, specializing in PV inverters, solar water pump systems, switchgear equipment, and batteries. The partnership aims to accelerate green energy transition in Vietnam and the broader Asia-Pacific region.

Scale indicators7 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Enphase Energy: US-based microinverter pioneer with expanding battery storage offering. Directly comparable to SAJ's M2 microinverter line and integrated home storage strategy across Western markets.
• SolarEdge Technologies: Israeli-headquartered designer of MLPE (power optimizers) and inverters with battery storage. Comparable to SAJ on distributed PV architecture and integrated energy solutions for residential and C&I.
• GoodWe Technologies: Chinese solar inverter and energy storage manufacturer with a comparable residential and C&I product portfolio, including hybrid inverters and battery systems, and a similar global distribution strategy.
• Inovance Technology: Shenzhen-based industrial automation leader in variable frequency drives, servos, and PLCs. Directly competes with SAJ's VFD/pump-controller portfolio (MC20, MC30, VM series, PDS solar pump controllers).
• Pylontech: Chinese battery storage manufacturer focused on residential and C&I lithium-ion systems. Directly comparable as a complementary storage component supplier and integrated solution provider in SAJ's product ecosystem.
• Ginlong Solis: Chinese string inverter manufacturer with strong global distribution across residential, C&I, and utility-scale segments. Directly competes with SAJ's R5/R6 grid-tied and H2 hybrid inverter lines.
• Sungrow Power Supply: China-based global leader in solar inverters and energy storage, directly overlapping SAJ's residential, C&I, and utility-scale inverter/ESS portfolio. Both target international expansion with integrated PV+storage solutions.
• Sofar Solar: Chinese manufacturer of grid-tied and hybrid inverters plus battery storage for residential and C&I markets. Closely comparable on product offering, distribution channels, and target customer base.
• Growatt New Energy: Shenzhen-headquartered manufacturer of residential and commercial inverters plus battery storage. Directly comparable to SAJ on product mix (hybrid inverters, all-in-one storage, microinverters) and global channel model.

Broad incumbents

• Huawei Digital Power: Smart PV and energy storage arm of Huawei covering residential, C&I, and utility-scale inverters plus smart energy management. Much larger incumbent with broader portfolio but overlapping core products.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/saj_solar
• YouTubeyoutube.com/channel/UCny4_V2B1zIqq8cB___cCjA
• Facebookfacebook.com/SAJsmartenergy
• LinkedInlinkedin.com/company/saj-electric
• Instagraminstagram.com/saj_electric

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries14 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SAJ