Zhejiang Minghe New Energy Technology
浙江明禾新能科技股份有限公司
Minghe is a Yuyao maker of conventional and smart PV junction boxes. Its SJB2y combines three housings with rapid-shutdown electronics, so the order has to cover the electronics, the shutdown signal and the module assembly as one specification.
Supplier at a glance
- Location
- Yuyao, Zhejiang
- Equipment listed here
- PV module junction-box components
- What Minghe makes
- Conventional and smart PV junction boxes and connectors, moulded, assembled and tested in-house. [1]
- SJB2y ratings
- Input 8–60 V DC; rated current 25A; maximum system voltage 1500 V DC. Each sits in a separate field. [3]
- Profile sources
- 5 named sources; source list
Company scope
What the company makes
浙江明禾新能科技股份有限公司 (Zhejiang Minghe New Energy Technology) dates its business to 2010 and builds PV junction boxes and connectors, plus smart interconnection products, at Yuyao. The website also sells microinverters and storage products; module makers will mostly buy from the box and connector lines. Minghe says it runs mould development, injection moulding, welding, assembly and testing in-house, with its own junction-box lab and automated lines for production and testing. When you qualify Minghe, ask to walk those lines and see the laboratory scope.
The catalogue splits conventional boxes, smart boxes and an external shutdown device. SJB2y is a three-piece smart box with an illustrated technical sheet. One long housing carries the electronics, and two shorter boxes sit beside it. The sheet gives the electronics an 8–60V DC input and, as a separate field, a 1500V DC maximum system voltage for the array.
Minghe states that SJB2y meets NEC 2017 section 690.12 and SunSpec. Ask for the current SJB2y certificate number, protocol version, approved transmitter pairing and firmware scope. DEKRA announced in June 2024 that Minghe won CB awards for junction boxes and connectors; that announcement names the company and leaves out the SJB2y model. Plan mechanical fit, electrical setup, signalling and system tests as one package. Minghe's contact page lists one mailbox in the body and another in the footer; check which is current before you send drawings.
Equipment portfolio
Start with the actual equipment
The entries below cover selected products and series from this manufacturer. Ask for the full catalogue if your project needs other models.
SJB2y module-integrated smart junction box →
SJB2y is Minghe's three-piece smart junction box for PV modules. A long housing holds the shutdown electronics, flanked by two shorter boxes. The sheet lists 8–60V DC input, 25A, 1500V DC system voltage, IP65/IP68 and 4mm² wire. Before you quote rapid shutdown,… [2]
Specifications & selection questions →From mould to tested box
How Minghe builds a box, and what to ask at each stage
Moulds and housings
Minghe develops its own moulds and injection-moulds the housings. For SJB2y, request the controlled drawings of the long and short housings, the PPO resin specification and the sealing and mounting interfaces, all under change control. [1][3]
Welding and assembly
Welding and assembly happen in the same plant. Ask for the ribbon-to-terminal connection method and the electronics handling rules written for this smart model, because a conventional box follows a different joining recipe. [1][3]
Laboratory and line testing
Minghe describes a junction-box laboratory and automated testing. Ask for the lab scope, calibration records, the routine test list and traceable sample results. If you plan to rely on the lifespan or quality lines from the website, request the test reports behind them. [1][3]
SJB2y
Input voltage, system voltage and the shutdown signal are three choices
Electronics input of 8–60 V DC
The sheet lists the 8–60 V DC input apart from the 1500 V DC system maximum. Check your module's electrical values and operating conditions against the input range, and size the array against the system figure. [3]
Ask for the signal package
SunSpec appears on the sheet without a protocol revision, a transmitter list or a tested system. Request the sender and receiver arrangement, the firmware version and the inverter or system combinations Minghe has validated. [3]
Agree how shutdown is accepted
NEC 2017 and SunSpec compliance are Minghe's own statements. Settle the current design and approval rules for your system and get the documented response behaviour in writing. The sheet gives no shutdown time or residual voltage. [3]
Company awards and model approval
What each source tells a buyer about Minghe and SJB2y
| Source | What it shows | What to request |
|---|---|---|
| Company introduction | Business since 2010 and an in-house PV component chain. | A plant visit or a current audit report for capacity. |
| SJB2y technical sheet | Drawing, ratings, materials and assembly entries. | Current certificate number, signal version and the full circuit specification. |
| DEKRA 2024 announcement | CB awards to Minghe for junction boxes and connectors. | A certificate that names SJB2y and covers its shutdown system. |
| 25-year website statement | Minghe's design-life figure. | Lifetime test data, field records and warranty terms. |
Lifespan and code figures appear as Minghe gives them. Ask for the reports behind any figure that goes into a contract. [1][3][4]
One package for box, signal and assembly
Order SJB2y as a complete module-integrated configuration
Work from the three-piece drawing
The long housing and the two smaller boxes need a defined ribbon and mounting layout. Ask Minghe for controlled dimensions, tolerances, mounting, wiring and the full cable and connector geometry, so nobody has to scale a photo. [3]
Clarify the 65mL gel figure
The sheet calls for potting sealant and roughly 65mL of silicone gel. It leaves open whether that amount is per set or per housing, and gives no tolerance, mix ratio or cure cycle. Ask Minghe for the split and its validated recipe. [3]
Test normal running and shutdown
Agree component and module tests, plus signal and failure scenarios, with your technical team. Log firmware, transmitter, component lots and process settings for each trial. The sheet makes no promise of remote monitoring, power optimisation or extra revenue. [3]
Project fit
Match the offering to your project
Module makers fitting a documented smart junction box into their laminate.
Teams qualifying the module's electrical and rapid-shutdown interfaces in the same programme.
Purchasing teams that need certificate, firmware and transmitter papers before signing.
Confirm before ordering
- Which SJB2y certificate annex is current, which signal revision and transmitter it pairs with, and the conditions it responds under.
- Full joining, bonding and cure instructions, and how the roughly 65mL of gel is split and toleranced.
- The producing site and results from your own samples.
Drawn from Minghe's company, contact and catalogue pages, the SJB2y sheet and DEKRA's June 2024 award announcement.
Certificates & approvals
Approvals on file
No factory audit or equipment certificate is on file for this manufacturer yet. Ask for current certificates, with their scope and validity, in your quotation request.
Prepare before contacting
Your SJB2y module-integrated smart junction box enquiry checklist
Tick the questions that apply to your project, then take them into your sourcing request. Ticking an item here does not contact the manufacturer.
Your selections remain on this page and are cleared on reload. Download or print to keep a copy. No checklist selections are uploaded.
Continue to sourcing requestBuyer questions
Is 1500 V DC the electronics input?
No. The sheet gives 8–60 V DC as the input and 1500 V DC as the system maximum, in separate fields. [3]
Does the DEKRA 2024 announcement list SJB2y?
It names Minghe for junction-box and connector CB awards. The SJB2y model is absent, so ask Minghe for a model certificate. [4]
Is there test data behind the 25-year figure?
The 25-year figure is Minghe's design statement. If it matters to your contract, request lifetime test data and the warranty terms. [3]
Is SJB2y the same as RSD-2?
No. RSD-2 is the external shutdown device with its own catalogue entry, and its data describe that device. [2]
Sources
Where this information comes from
SJB2y drawings and ratings are public; ask Minghe to confirm rapid-shutdown approval and the producing site in writing.
Company facts come from the publications listed below, each with the date it was checked. The project-fit notes and enquiry checklist are our buying guidance.
- Minghe company introduction ↗Company website · Checked Read on 2026-10-11
History since 2010 and the in-house component production chain.
- SJB2y product page ↗Product page · Checked Read on 2026-10-11
The SJB2y smart box, listed apart from RSD-2 and SJB2w.
- SJB2y illustrated technical sheet ↗Technical sheet (image) · Checked Read on 2026-10-11
Ratings, drawings, materials, and Minghe's 25-year, NEC and SunSpec statements.
- DEKRA 2024 SNEC award announcement ↗Certification body announcement · Checked Read on 2026-10-11
14 June 2024: CB awards to Minghe for junction boxes and connectors; no model list.
- Minghe contact page ↗Company website · Checked Read on 2026-10-11
Page body and footer give two different mailboxes.
Report a correction · How we prepare listings · Represent this manufacturer?
Build a useful enquiry
Start with the documented equipment, then define the configuration and acceptance criteria for your project.
Prepare the checklist ↓Saving or comparing does not send a request. The next screen handles account access and the actual sourcing workflow.