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.

5,206 US filings from 1,544 companies since 2023 · 2023: 1,243 · 2024: 1,629 · 2025: 1,615 · 2026 YTD: 719

Photovoltaic (Solar Cells)

Top companies

Ranked by filings in this theme since 2023. 2026 is partial.

#	Company	Since 2023	2023	2024	2025	2026 YTD	YoY
1	Huawei Digital Power Technologies Co., Ltd.	147	53	39	41	14	+5.1%
2	LG Energy Solution, Ltd.	118	16	42	38	22	-9.5%
3	Solaredge Technologies Ltd.	82	22	29	29	2	0.0%
4	TOYOTA JIDOSHA KABUSHIKI KAISHA	75	14	23	29	9	+26.1%
5	Siemens Aktiengesellschaft	73	22	29	11	11	-62.1%
6	ABB Schweiz AG	67	19	15	20	13	+33.3%
7	Sungrow Power Supply Co., Ltd.	64	11	19	26	8	+36.8%
8	Hyundai Motor Company	59	11	11	22	15	+100.0%
9	Kia Corporation	57	8	11	22	16	+100.0%
10	Robert Bosch GmbH	57	13	24	16	4	-33.3%
11	Mitsubishi Electric Corporation	55	12	18	17	8	-5.6%
12	HITACHI ENERGY LTD	52	·	14	23	15	+64.3%
13	GM GLOBAL TECHNOLOGY OPERATIONS LLC	49	9	12	21	7	+75.0%
14	SCHNEIDER ELECTRIC USA, INC.	46	9	16	14	7	-12.5%
15	Schweitzer Engineering Laboratories, Inc.	46	14	14	13	5	-7.1%
16	Eaton Intelligent Power Limited	43	5	13	12	13	-7.7%
17	Panasonic Intellectual Property Management Co., Ltd.	40	8	11	18	3	+63.6%
18	SMA Solar Technology AG	37	14	11	9	3	-18.2%
19	Bender GmbH & Co. KG	33	7	9	11	6	+22.2%
20	ITRON, INC.	33	12	10	4	7	-60.0%
21	Samsung SDI Co., Ltd.	33	5	3	15	10	+400.0%
22	Aclara Technologies LLC	31	7	7	10	7	+42.9%
23	S&C Electric Company	31	14	10	5	2	-50.0%
24	Schneider Electric Industries SAS	31	13	7	4	7	-42.9%
25	HAMILTON SUNDSTRAND CORPORATION	29	8	12	7	2	-41.7%