Company patents

SMA Solar Technology AG

SMA Solar Technology AG's patent strategy is heavily concentrated in core electrical power technologies, with Power Distribution & Storage (47.5% of portfolio) and Power Conversion (DC/AC, DC/DC) (42.4% of portfolio) dominating, both showing significant year-over-year fluctuations but a recent decline in 2026 so far. Interestingly, while core areas like Electrical Measurement and Photovoltaic (Solar Cells) are seeing declines, the company is showing an emerging focus in Cryptographic Mechanisms, which saw a 100.0% year-over-year growth in 2026 so far, suggesting a surprising pivot towards secure communication within its broader energy solutions.

Patent Trend by Technology Area

Yearly patent publications since 2023

Product themes

Product-level themes inferred from filings since 2023, with category chips showing where each theme appears. Select a theme to filter the patents below.

139 US filings (since 2023) · 11 categories · 25 themes

Advanced Power Converter Topologies

Focuses on novel circuit configurations for DC-DC, DC-AC, or AC-DC conversion, often involving resonant operation, multi-level structures, or switched capacitors to improve efficiency, power density, or voltage conversion ratios.

Power Conversion (DC/AC, DC/DC)
Who else files here? →
66since 2023
+69.2%YoY
Power Systems with Energy Storage & Grid Interaction

Integration of power converters with energy storage devices (batteries, supercapacitors) or grid interfaces, often involving AC/DC conversion, power flow management, and fault handling for hybrid power systems or specific applications like EVs or PV.

Power Distribution & StoragePower Conversion (DC/AC, DC/DC)
Who else files here? →
55since 2023
+80.0%YoY
PV System Fault Diagnosis

Methods and devices for monitoring the operational parameters of photovoltaic systems, detecting anomalies, and diagnosing specific faults like reverse connections, insulation failures, or efficiency drops, often using predictive models.

Photovoltaic (Solar Cells)
Who else files here? →
37since 2023
-18.2%YoY
Adaptive Power Disconnection & Reclosing

Intelligent control systems that manage the connection and disconnection of power, including pre-charging capacitive loads, reclosing after faults, or isolating parts of a grid based on detected conditions, often involving smart switches and relays with adaptive logic.

Emergency Protective Circuits
Who else files here? →
24since 2023
+125.0%YoY
Power Electronics Integration

Design and assembly of power conversion, distribution, and protection modules, focusing on compact form factors, efficient electrical connections, and robust protective measures for electronic systems, often in high-power applications.

Printed Circuits & Electronic Assemblies
Who else files here? →
23since 2023
-14.3%YoY
Electrolyzer Durability & Control

Methods and systems for enhancing the operational lifespan, stability, and performance management of electrolyzers, including strategies for preventing degradation, restoring activity, and regulating operating conditions.

Electrolysis & Electrochemistry
Who else files here? →
15since 2023
+25.0%YoY
Modular & Hybrid Power Supply Systems

Design and control of power supply architectures that combine multiple power sources (e.g., AC grid, DC battery, generators) or modular battery units, often featuring switching, conversion, and redundancy for enhanced reliability and flexibility.

Power Distribution & Storage
Who else files here? →
11since 2023
0.0%YoY
Device Enclosure & Material Engineering

Methods and materials used to construct robust and protective enclosures for electronic devices, focusing on structural integrity, impact resistance, thermal dissipation, and specialized material properties for enhanced durability.

Printed Circuits & Electronic Assemblies
Who else files here? →
8since 2023
+50.0%YoY
Advanced Electronic Packaging

Methods and structures for integrating and enclosing electronic components into compact, multi-functional modules, often involving embedded components, multi-layer substrates, and electromagnetic shielding for performance and miniaturization.

Printed Circuits & Electronic Assemblies
Who else files here? →
8since 2023
+50.0%YoY
Electrolyzer Cell Components

Design and engineering of non-catalytic parts within an electrolysis cell or stack, such as separators, gaskets, flow fields, porous transport layers, and manifold devices, to improve efficiency, sealing, or gas management.

Electrolysis & Electrochemistry
Who else files here? →
8since 2023
-33.3%YoY
Solar Power Integration & Applications

Systems that incorporate solar panels as a primary or auxiliary power source for various applications, including visual displays, remote devices, and portable battery charging, often emphasizing efficiency and adaptability.

Power Distribution & Storage
Who else files here? →
8since 2023
-50.0%YoY
Module-Level Power Electronics (MLPE)filtered

Power conversion and optimization circuits, such as inverters, optimizers, or charge controllers, directly integrated with individual photovoltaic modules or cells to enhance performance and manage power output.

Photovoltaic (Solar Cells)
Who else files here? →
7since 2023
0.0%YoY
Advanced Fault Detection

Techniques and circuits for accurately identifying various electrical faults, such as ground faults, overcurrent, short circuits, switch malfunctions, or electrostatic discharge (ESD) events, often utilizing sensors, signal processing, and diagnostic algorithms.

Emergency Protective Circuits
Who else files here? →
7since 2023
-66.7%YoY
High-Pressure Electrolysis Systems

Engineering solutions for safely and efficiently operating electrolysis devices at elevated pressures, including specialized sealing, pressure regulation, and system integration for high-pressure gas generation and handling.

Electrolysis & Electrochemistry
Who else files here? →
6since 2023
-66.7%YoY
Power Consumption & Current Sensing

Devices and methods for accurately measuring or monitoring electrical current draw and power usage in various systems, often for control, optimization, or safety purposes.

Electrical Measurement
Who else files here? →
5since 2023
0.0%YoY
Control & Stability for Power Converters

Techniques and circuits designed to regulate output, manage input variations, mitigate resonance, or ensure stable operation of power converters under diverse load and source conditions. This includes adaptive, predictive, or fault-tolerant control schemes.

Power Conversion (DC/AC, DC/DC)
Who else files here? →
5since 2023
0.0%YoY
Advanced Material Characterization

Techniques and systems for precisely measuring electrical or electromagnetic properties of materials or components, often involving specialized resonators, waveguides, or multi-range measurement systems to ensure accuracy.

Electrical Measurement
Who else files here? →
3since 2023
+100.0%YoY
EV Charging Systems & Control

Technologies for efficiently delivering power to electric vehicles, encompassing fast charging, wireless charging, and smart grid integration, alongside vehicle-side control and management of the charging process.

Power Distribution & Storage
Who else files here? →
2since 2023
new
Motor System Fault Detection

Methods and systems for identifying anomalies, failures, or impending issues within electric motors or their associated drive and power management circuits, often by monitoring electrical or operational parameters.

Electrical Measurement
Who else files here? →
2since 2023
0.0%YoY
Granular Data Encryption & Access Control

Systems and methods for encrypting data at a fine-grained level (e.g., per data unit or based on sensitivity) and controlling access to it, often involving delegated authorization, contextual policies, or secure data sharing.

Cryptographic Mechanisms
Who else files here? →
1since 2023
new
Automated PV Panel Cleaning

Systems and methods for automatically removing dust, dirt, or debris from photovoltaic panel surfaces to maintain optimal energy conversion efficiency, often involving robotic or integrated mechanisms.

Photovoltaic (Solar Cells)
Who else files here? →
1since 2023
new
Battery Management Systems

Software, algorithms, and associated hardware for monitoring, controlling, and optimizing battery performance, safety, and lifespan, including charge/discharge cycles, thermal regulation, and system integration.

Power Distribution & StorageBatteries & Fuel Cells
Who else files here? →
1since 2023
n/a
Enhanced PV Module Design

Innovations in the physical and optical structure of photovoltaic modules, including cover plates, integrated features, and non-planar designs, to improve light absorption, aesthetics, or installation.

Photovoltaic (Solar Cells)
Who else files here? →
1since 2023
n/a
High-Density Magnetic Component Integration

Techniques for designing and manufacturing compact, multi-functional magnetic components, such as inductors, transformers, and coils, often involving embedded structures, multilayer designs, or shared magnetic circuits to achieve higher power density or smaller form factors.

Magnets & Inductors
Who else files here? →
1since 2023
n/a
Access Control & Identity Management

Systems and methods for authenticating users, devices, or applications, authorizing their access to resources based on policies, and managing digital identities across various platforms.

Network Security & Access Control
Who else files here? →
1since 2023
n/a

Patents

Page 1 of 1
US 12313698 B2GRANTED
G01R31/42

Method for self-testing of a phase of a 3-level ANPC converter with LC filter

Filed:2023-02-22Pub:2025-05-27
Applicant:SMA Solar Technology AG

A method for testing an inverter having a bridge comprising a first switch (T 1 ) arranged between a positive connection (DC+) of a divided link circuit, having a center point (M), and a positive inner connection (PI), a second switch (T 2 ) arranged between the positive inner connection (PI) and a bridge output (BR), a third switch (T 3 ) arranged between the bridge output (BR) and a negative inner connection (NI), a fourth switch (T 4 ) arranged between the negative inner connection (NI) and a negative connection (DC−) of the divided link circuit, a fifth switch (T 5 ) arranged between the center point (M) and the positive inner connection (PI), and a sixth switch (T 6 ) arranged between the center point (M) and the negative inner connection (NI) is disclosed. A grid filter having a filter inductor (LF) and a filter capacitor (CF) is connected to the bridge output (BR). The method comprises applying a link circuit voltage to the divided link circuit, while the bridge output (BR) is isolated from a connected grid using the connected grid filter, fully discharging the filter capacitor (CF), closing the first switch (T 1 ) and the sixth switch (T 6 ), while the fourth switch (T 4 ) and the fifth switch (T 5 ) are open, subsequently clocking the second switch (T 2 ) using a plurality of short pulses, wherein the duty cycle of the short pulses is predetermined between 1% and 5%, subsequently to the clocking determining a voltage dropped across the filter capacitor (CF) and identifying a fault state of the bridge when the voltage dropped is outside of a voltage window with an upper window limit and a lower window limit. An inverter is also disclosed, which has a control system designed and set up to execute the method according to one of the preceding claims and to connect the inverter to a connected grid only if a fault state is not identified.

US 11888439 B2GRANTED
H02S40/32

Method for determining a characteristic curve of a photovoltaic (PV) string, DC/DC converter, and photovoltaic system suitable for carrying out the method

Filed:2021-12-17Pub:2024-01-30
Applicant:SMA Solar Technology AG

The disclosure relates to a method for determining a characteristic curve for a photovoltaic (PV) string of a photovoltaic system having an inverter which is connected to the photovoltaic string and to a power supply network. The photovoltaic string includes a series connection of a plurality of photovoltaic modules, in which series connection at least one of the photovoltaic modules is integrated into the series connection of the photovoltaic modules via a DC/DC converter. The at least one DC/DC converter operates the photovoltaic module assigned thereto in a first operating mode M1 at a maximum power point by varying, over time, a conversion ratio of output voltage (U Out ) to input voltage (U In ), and operates the photovoltaic module in a second operating mode M2 with a conversion ratio of output voltage (U Out ) to input voltage (U In ) that is constant over time. The method includes operating the at least one DC/DC converter in the second operating mode M2 in response to a current signature for the current (I Str ) through the photovoltaic string, determining the characteristic curve by varying the current I Str or the voltage U Str of the photovoltaic string by the inverter, and detecting values assigned to one another for current I Str and voltage U Str of the photovoltaic string in the second operating mode M2 of the DC/DC converter.

US 20230194626 A1APPLICATION
G01R31/42

METHOD FOR SELF-TESTING OF A PHASE OF A 3-LEVEL ANPC CONVERTER WITH LC FILTER

Filed:2023-02-22Pub:2023-06-22
Applicant:SMA Solar Technology AG

A method for testing an inverter having a bridge comprising a first switch (T 1 ) arranged between a positive connection (DC+) of a divided link circuit, having a center point (M), and a positive inner connection (PI), a second switch (T 2 ) arranged between the positive inner connection (PI) and a bridge output (BR), a third switch (T 3 ) arranged between the bridge output (BR) and a negative inner connection (NI), a fourth switch (T 4 ) arranged between the negative inner connection (NI) and a negative connection (DC−) of the divided link circuit, a fifth switch (T 5 ) arranged between the center point (M) and the positive inner connection (PI), and a sixth switch (T 6 ) arranged between the center point (M) and the negative inner connection (NI) is disclosed. A grid filter having a filter inductor (LF) and a filter capacitor (CF) is connected to the bridge output (BR). The method comprises applying a link circuit voltage to the divided link circuit, while the bridge output (BR) is isolated from a connected grid using the connected grid filter, fully discharging the filter capacitor (CF), closing the first switch (T 1 ) and the sixth switch (T 6 ), while the fourth switch (T 4 ) and the fifth switch (T 5 ) are open, subsequently clocking the second switch (T 2 ) using a plurality of short pulses, wherein the duty cycle of the short pulses is predetermined between 1% and 5%, subsequently to the clocking determining a voltage dropped across the filter capacitor (CF) and identifying a fault state of the bridge when the voltage dropped is outside of a voltage window with an upper window limit and a lower window limit. An inverter is also disclosed, which has a control system designed and set up to execute the method according to one of the preceding claims and to connect the inverter to a connected grid only if a fault state is not identified.

US 20220109401 A1APPLICATION
H02S40/32

METHOD FOR DETERMINING A CHARACTERISTIC CURVE OF A PHOTOVOLTAIC (PV) STRING, DC/DC CONVERTER, AND PHOTOVOLTAIC SYSTEM SUITABLE FOR CARRYING OUT THE METHOD

Filed:2021-12-17Pub:2022-04-07
Applicant:SMA Solar Technology AG

The disclosure relates to a method for determining a characteristic curve for a photovoltaic (PV) string of a photovoltaic system having an inverter which is connected to the photovoltaic string and to a power supply network. The photovoltaic string includes a series connection of a plurality of photovoltaic modules, in which series connection at least one of the photovoltaic modules is integrated into the series connection of the photovoltaic modules via a DC/DC converter. The at least one DC/DC converter operates the photovoltaic module assigned thereto in a first operating mode M1 at a maximum power point by varying, over time, a conversion ratio of output voltage (U Out ) to input voltage (U In ), and operates the photovoltaic module in a second operating mode M2 with a conversion ratio of output voltage (U Out ) to input voltage (U In ) that is constant over time. The method includes operating the at least one DC/DC converter in the second operating mode M2 in response to a current signature for the current (I Str ) through the photovoltaic string, determining the characteristic curve by varying the current I Str or the voltage U Str of the photovoltaic string by the inverter, and detecting values assigned to one another for current I Str and voltage U Str of the photovoltaic string in the second operating mode M2 of the DC/DC converter.