In photovoltaic energy storage systems, string inverters serve as core equipment responsible for DC-AC conversion, power regulation, grid-tied control and system protection. As PV inverters evolve toward higher power density, long-term outdoor operation, superior reliability and automated manufacturing, stricter standards are imposed on adhesive materials for internal power components, PCBs, inductors, connectors, capacitors, heat dissipation structures and enclosure sealing.
If you are searching for inverter potting compound, inductor potting adhesive, connector encapsulant, PV inverter thermal interface materials, PCB conformal coating or inverter enclosure sealant, Elaplus Functional Materials (Shanghai) Co., Ltd. delivers a full one-stop adhesive solution covering thermal transfer, potting, three-proof protection, structural bonding and sealing. Our products are applicable to string inverters, PV inverters, energy storage inverters and other new energy power electronic devices.
I. Why Do String Inverters Require Specialized Adhesives?
String inverters run continuously on rooftop PV stations, industrial & commercial PV projects, ground-mounted power plants and PV energy storage systems amid harsh operating conditions, including rapid high-low temperature cycling, heat & humidity, salt spray, dust, rainwater, UV aging, mechanical vibration and sustained heat generation from power components.
In such working environments, adhesives do not merely fix parts in place; they fulfill these critical core functions:
■ Thermal Conduction & Heat Dissipation: Reduce interfacial thermal resistance between power semiconductors, power modules and heat sinks.
■ Potting Protection: Provide insulation, moisture resistance and shock resistance for critical parts such as connectors, inductors and capacitors.
■ PCB Three-proof Coating: Boost circuit board resistance to moisture, corrosion, salt spray and enhance electrical insulation.
■ Component Fixation: Prevent loosening, cracking and fatigue failure caused by vibration and impact.
■ Enclosure Sealing: Elevate overall waterproof, dustproof and outdoor weather resistance of the inverter.
Therefore, PV inverter manufacturers, energy storage inverter producers and new energy power equipment makers directly determine equipment reliability and service life by selecting proper inverter potting adhesives, inductor encapsulants and connector potting compounds.
II. Inverter Thermal Interface Materials: TCMP 1920-2K & SIGR 2230
Tiny gaps exist between internal power semiconductors, heat sinks, power modules and structural parts of string inverters. Unremoved excess heat will trigger excessive component temperature rise, impairing conversion efficiency and long-term stability.
Recommended Product: TCMP 1920-2K Thermal Conductive Gel
TCMP 1920-2K is Elaplus’s silicone thermal gel engineered for inverter thermal management, designed for gap filling between power devices and heat dissipation structures.
Specifications & Features
■ Thermal conductivity: ~2.0 W/m·K
■ Density: ~1.98 g/cm³
■ Tack-free time: 30–60 min
■ Hardness: Shore 00 60
■ Volume resistivity: ~1.0×10¹³ Ω·cm
■ Operating temperature: -60℃ ~ 200℃
■ Highlights: 1:1 mix ratio, reworkable, ideal for internal thermal filling of PV inverters
Recommended Product: SIGR 2230 Thermal Grease
SIGR 2230 is high-performance thermal grease for high-heat interfaces, with thermal conductivity of ~3.0 W/m·K and operating temperature ranging from -60℃ to 200℃. It fits thermal transfer applications for power semiconductors, heat sinks and module bases.
For customers sourcing PV inverter thermal materials, thermal glue or thermal gel for inverters, Elaplus customizes matching formulas based on structural design, rework requirements and thermal conductivity targets.
III. PCB Conformal Coating: Coating 9060-M for Inverter Circuit Board Protection
PCB control boards, drive boards, communication modules and sampling circuits inside string inverters face constant threats of moisture, salt spray, dust and corrosion. Conformal coating forms a protective film over circuit surfaces to strengthen electrical reliability.
Recommended Product: Coating 9060-M PU Acrylic Dual-cure Conformal Coating
Coating 9060-M is a single-component UV & moisture dual-cure three-proof coating, suitable for inverter PCB protection, control board shielding, drive board waterproofing and insulating coating for electronic components.
Specifications & Features
■ Appearance: Pale yellow liquid
■ Density: ~1.1 g/cm³
■ Hardness: ≥HB
■ Volume resistivity: ~1.0×10¹⁴ Ω·cm
■ Operating temperature: -65℃ ~ 135℃
■ Highlights: Medium viscosity, low odor, strong adhesion, compatible with automated coating and UV curing processes
Elaplus Coating 9060-M serves as a reliable circuit board protective material for buyers looking for inverter PCB conformal coating, PV inverter three-proof coating or PCB moisture-proof insulating glue.
IV. Connector Potting Adhesive: EP 1788AB to Boost Port Sealing & Insulation Reliability
Connectors are vital components of string inverters, covering DC input ports, AC output terminals, communication interfaces and high-voltage connection zones. Long-term exposure to temperature swings, humidity, dust and mechanical stress creates risks of water infiltration, degraded insulation, terminal loosening and cracking.
Thus connector potting compounds must deliver high bonding strength, waterproof & moisture resistance, low coefficient of thermal expansion (CTE), superior insulation and crack resistance.
Recommended Product: EP 1788AB Epoxy Connector Encapsulant
EP 1788AB is Elaplus’s epoxy potting adhesive for inverter connectors, applicable to terminal encapsulation, connector sealing, high-voltage interface protection and partial electronic packaging.
Specifications & Features
■ System type: Epoxy potting compound
■ Appearance: Part A white/black; Part B transparent
■ Tack-free time: 50–90 min
■ Hardness: Shore D90
■ Thermal conductivity: ~0.6 W/m·K
■ Volume resistivity: ~1.0×10¹⁴ Ω·cm
■ Operating temperature: -50℃ ~ 180℃
■ Highlights: Low CTE, waterproof & moisture-proof, high bonding strength, anti-cracking
For purchasers of connector potting glue, inverter connector encapsulant or PV inverter terminal potting compound, EP 1788AB effectively upgrades sealing, insulation and long-term weather stability of connector areas.
V. Component Fixation Adhesives: SIPC 1928 & SIPE 1857
Internal electronic parts, power modules, wire harnesses, sensors, fasteners and structural supports inside inverters require stable fixation. Component mounting adhesives need balanced bonding power, flexibility and temperature resistance to avoid part loosening or solder joint fatigue under prolonged vibration.
Recommended Product: SIPC 1928 Thermal Fixing Silicone
SIPC 1928 is a single-part room-temperature curable thermal silicone, used for power device bonding, thermal attachment and structural reinforcement.
Key Specifications
■ Color: White
■ Density: ~3.1 g/cm³
■ Tack-free time: 5–10 min
■ Hardness: Shore A75
■ Thermal conductivity: ~2.85 W/m·K
■ Volume resistivity: ~1.0×10¹⁴ Ω·cm
■ Operating temperature: -60℃ ~ 200℃
■ Highlights: Elastic, non-yellowing, high thermal conductivity
Recommended Product: SIPE 1857 General Component Mounting Silicone
SIPE 1857 is single-component room-temperature vulcanized silicone for fixation, bonding and insulation protection of standard electronic components.
Key Specifications
■ Color: Black / White
■ Density: ~1.6 g/cm³
■ Tack-free time: 3–10 min
■ Hardness: Shore A75
■ Thermal conductivity: ~0.8 W/m·K
■ Volume resistivity: ~3.9×10¹⁵ Ω·cm
■ Operating temperature: -60℃ ~ 200℃
■ Highlights: Good extrudability, ideal for component bonding
VI. Inductor Potting Compound: SIPA 1850(15#)AB Low-stress Thermal Potting Solution
Inductors are critical magnetic elements in string inverters, enduring stress from current fluctuation, temperature rise, vibration and thermal cycling. Inductor encapsulants must provide thermal conduction, insulation, low stress, shock resistance and wide temperature tolerance.
Recommended Product: SIPA 1850(15#)AB Silicone Thermal Potting Adhesive
SIPA 1850(15#)AB is Elaplus’s silicone potting material tailored for inverter inductors, for encapsulation protection of inductors, magnetic components, power modules and partial electronic assemblies.
Specifications & Features
■ System type: Silicone potting compound
■ Appearance: Part A gray; Part B white
■ Mix ratio: A:B = 1.65:1.65 (1:1 equivalent)
■ Tack-free time: 3–4 h
■ Hardness: Shore A20
■ Thermal conductivity: ~1.5 W/m·K
■ Volume resistivity: ~1.0×10¹⁴ Ω·cm
■ Operating temperature: -60℃ ~ 200℃
■ Highlights: 1:1 mix ratio, Shore A20 soft hardness, low stress, perfect for inductors and magnetic component protection
For buyers searching for inductor potting glue, inverter inductor encapsulant, PV inductor potting compound or thermal conductive inductor adhesive, SIPA 1850(15#)AB serves as a low-stress, heat-resistant, thermally conductive potting option.
VII. Enclosure Sealant: SIPC 1859 for Outdoor Inverter Protection
String inverters operate outdoors year-round; enclosure sealing directly determines the unit’s defense against rain, dust, humidity, salt spray and contaminants. Enclosure sealants must balance sealing reliability, weatherability, heat resistance and easy rework.
Recommended Product: SIPC 1859 Enclosure Silicone Sealant
SIPC 1859 is a single-component room-temperature vulcanized silicone sealant, designed for inverter housing, cover plate, cabinet and outdoor equipment sealing.
Specifications & Features
■ Density: ~1.43 g/cm³
■ Tack-free time: 15–20 min
■ Hardness: Shore A78
■ Thermal conductivity: ~0.35 W/m·K
■ Volume resistivity: ~2.0×10¹⁴ Ω·cm
■ Operating temperature: -60℃ ~ 300℃
■ Highlights: Single-part RTV silicone, low adhesion for easy rework, oil-resistant, outstanding sealing performance
SIPC 1859 boosts overall waterproof, dustproof and maintainability for customers sourcing inverter housing sealant, PV inverter sealant or inverter cover plate adhesive.
VIII. Why Choose Elaplus for String Inverter Adhesive Solutions?
Elaplus Functional Materials (Shanghai) Co., Ltd. delivers systematic functional material solutions for PV energy storage, string inverters, lithium battery Packs and new energy electronic equipment. For the inverter industry, our product portfolio covers all core applications:
■ Inverter potting adhesive: Encapsulation protection for connectors, inductors, capacitors and partial electronic modules
■ Inductor potting compound: Low-stress thermal encapsulation for magnetic components
■ Connector potting glue: Waterproof & insulating shielding for terminals, high-voltage and communication ports
■ PCB conformal coating: Surface protection for control, drive and communication boards
■ Inverter thermal interface materials: Thermal management for power semiconductors, heat sinks and module bases
■ Enclosure sealant: Sealing for inverter covers, cabinets and outer housings
Elaplus’s competitive edges: full-spectrum product lineup, compatibility with automated production, stable performance across wide temperature ranges, balanced thermal & insulating properties, plus custom material selection support aligned with clients’ structural designs and process standards.
IX. FAQ: How to Select Inverter, Inductor & Connector Potting Adhesives
1. Which potting material is recommended for inverters?
Select epoxy system EP 1788AB for connectors, terminals and high-strength partial encapsulation; choose silicone SIPA 1850(15#)AB for inductors, magnetic parts and low-stress potting scenarios.
2. Why is low stress critical for inductor potting?
Inductors bear heat buildup, vibration and thermal cycling during operation. Overly hard or high-stress potting glue raises risks of cracking, delamination or component damage. Elaplus SIPA 1850(15#)AB features soft hardness and thermal conductivity optimized for inductor encapsulation.
3. Why is EP 1788AB the top pick for connector potting?
Connector encapsulation demands waterproofing, moisture resistance, insulation, strong bonding and crack resistance. EP 1788AB epoxy potting adhesive delivers low CTE, excellent water & humidity resistance, high adhesion and anti-cracking traits ideal for inverter connectors.
4. Can Elaplus supply a full one-stop adhesive package for complete string inverters?
Yes. We provide thermal interface materials, PCB conformal coating, connector potting glue, component fixation adhesive, inductor encapsulant and enclosure sealant to cover all major bonding & sealing points of string inverters.
Selecting premium adhesives is pivotal for PV and energy storage equipment manufacturers to lift device reliability, thermal management efficiency and outdoor durability. For all demands covering inverter potting glue, inductor encapsulant, connector potting compound, PCB three-proof coating, inverter thermal materials and housing sealant, Elaplus Functional Materials (Shanghai) Co., Ltd. provides professional, stable and implementable full adhesive solutions for string inverters.
Elaplus Functional Materials (Shanghai) Co., Ltd.
Specialized in adhesive solutions for PV energy storage, string inverters, lithium battery Packs and new energy electronic devices
