Greenhouse Microgrid Wiring for a 1.5MW / 3.2MWh Agri-PV System
A working greenhouse runs humid. Water evaporates off the crop and the floor every day, and when the sun drops, the structure sheds condensation on everything inside, including electrical runs and connection points. That is the working environment for a 1.5MW / 3.2MWh microgrid in Westland, Netherlands, where a commercial horticultural enterprise balances rooftop solar generation and on-site LED crop lighting loads. The greenhouse microgrid wiring runs between storage, conversion, and lighting distribution. We supplied CN series push-in connectors from the energy storage line, with the CN10 on the main 300A DC paths, and factory-terminated cable assemblies built to the site’s electrical layout.
Project at a glance
| Application | Agri-PV greenhouse microgrid wiring: rooftop solar, battery storage, LED crop lighting |
| System capacity | 1.5MW / 3.2MWh |
| Location | Westland, Netherlands |
| Connector solution | CN series push-in storage connectors, CN06-CN14 (70A-500A) |
| Main circuit model | CN10, rated 300A with 95mm² cable |
| System voltage | 1500V DC |
| Terminations | Threaded hole, screw type, nut type, or through-hole |
| Protection | IP67, V-0 flame retardant (UL94), PA66 housing |
| Cable solution | Custom, factory-terminated assemblies, cut and labeled per site layout |
Greenhouse Microgrid Wiring Challenges
Greenhouse microgrid wiring at this scale is an environmental and thermal system, not a collection of individual connections. Three constraints drove the design.
Humidity and condensation that never fully goes away
Horticultural greenhouses sit at the far end of what most DC connectors are designed for. Irrigation and plant transpiration keep relative humidity high for most of the day, and the temperature swing between night and morning produces condensation on every cool surface. Standard connector housings can trap that moisture at the seal line. Over a growing season, corrosion at the contact area shows up as rising contact resistance and temperature, not as a sudden open circuit. For a 300A circuit, that trend matters.
300A current against a warm greenhouse envelope
LED crop lighting draws steady, high-density current through the long dark hours of a Dutch winter, and the microgrid battery has to carry the same paths in both directions. Inside a greenhouse, ambient temperature already runs high near the roof line and lighting racks. A connector at 300A has a fixed temperature-rise budget, and any margin lost to a poor joint, an undersized contact, or an incompatible cable spec shortens the useful life of the whole run. The connection has to stay inside its temperature-rise budget through hours of continuous load, not just at the nameplate test point.
Crop cycles and seasonal lighting changes
Horticulture runs on crop cycles, not maintenance windows. Between crops, crews change lighting layouts, add lighting zones, and reconfigure DC distribution, often under time pressure. Every disconnect and reconnect is a chance for a polarity mix-up or a half-seated joint, and every minute of downtime inside a lighting change is lost production. In a greenhouse full of heavy cables that look alike after a season of handling, the wiring has to make the correct connection obvious and a reversed one hard to achieve.
The Solution: CN series connectors and cable assemblies rated for the greenhouse environment
For greenhouse microgrid wiring, we paired CN series push-in storage connectors with factory-terminated cable assemblies. The specification step matters as much as the connector itself, so both were checked against the project voltage, continuous and peak current, cable schedule, and the moisture conditions of the greenhouse before a meter of cable was cut. The EPC received a wiring kit, not a box of parts to assemble on site.
- Fast self-locking, one-key release. The push-in latch gives a clear electrical and mechanical connection every time, rated for 500+ mating cycles. Lighting zones can be disconnected for reconfiguration and reconnected quickly, without the tools a bolted connection needs.
- Finger-spring high-current contacts. Silver-plated T2Y pure copper contacts use a finger-spring design that keeps contact pressure stable under sustained load, holding contact resistance at or below 0.5mΩ (measured at 100mA) on the CN10 main circuits.
- Polarity control built into the configuration. Positive and negative housings are visually distinct by color, and the approved configuration for this project included keyed, polarized mating halves, so a reversed joint cannot be closed in the first place. In a microgrid where crews work between crop cycles under time pressure, that removes the most expensive wiring error before it happens.
- Termination options for busbars and terminals. Threaded-hole, screw-type, nut-type, and through-hole plug ends match battery busbars, inverter terminals, and lighting distribution bars directly, with cable outlets that rotate 360 degrees so routing stays clean through tight service aisles.
- Cut-to-length assemblies. Each run is factory-terminated and measured against the site layout. The crew on site assembles the joints instead of crimping cable, so less live DC work happens inside the greenhouse.
CN series storage connectors: current rating by model
Rated current is the natural starting point for greenhouse microgrid wiring. The CN series covers 70A to 500A in five sizes at up to 1500V DC, so selection follows the circuit. The 300A battery and lighting distribution paths land on the CN10 with 95mm² cable. Smaller lighting zones can drop to the CN08 with 35mm². One connector family, one tooling set, one spares list for the whole installation.
| Model | Rated current | Applicable cable |
|---|---|---|
| CN06 | 70A / 100A / 120A | 10 / 16 / 25mm² |
| CN08 | 150A / 200A / 250A | 35 / 50 / 70mm² |
| CN10 | 200A / 250A / 300A | 50 / 70 / 95mm² |
| CN12 | 250A / 300A / 350A | 70 / 95 / 120mm² |
| CN14 | 400A / 450A / 500A | 150 / 185mm² |
Series specifications (CN series)
| Rated voltage | Up to 1500V DC |
| Contact resistance | ≤0.5mΩ at 100mA (CN10-CN14; CN06/CN08 ≤0.2mΩ) |
| Insulation resistance | >500MΩ |
| Dielectric strength | Up to 4000V AC |
| Plugging force | ≤75N |
| Mating cycles | ≥500 |
| Operating temperature | -40°C to +125°C |
| Waterproof / flame retardant | IP67 / V-0 (UL94) |
| Housing material | PA66 |
| Contact material | T2Y pure copper, silver plated |
| Colors | Positive orange/red, negative black |
View the full Energy Storage Connector Series →
What we customized
This was not an off-the-shelf connector sale. Greenhouse microgrid wiring rarely is. The customer needed a wiring system built around their site layout, and every variable below was configured before production.
- Cable configuration. Length, conductor size, insulation, jacket color, bend allowance, and routing direction matched to the site’s single-line diagram and lighting distribution layout, with positive and negative runs kept visually distinct.
- Connector configuration. Model and current rating, termination style (threaded hole, screw, nut, or through-hole), keyed polarized mating pair assignment, and protective accessories.
- Assembly quality. Factory termination with controlled tooling, torque specs documented for screw and nut terminations, and each joint checked before packing.
- Identification and packing. Part labels, serial or batch marking, assembly drawings, and project-specific packaging so the receiving team can match every kit to a section of the layout.
How it shipped
The EPC shared the electrical single-line diagram, cable schedule, and greenhouse layout. Our applications engineer matched connector sizes and terminations to the battery, inverter, and lighting distribution interfaces, and factory-assembled the cable runs to length with labels and assembly drawings to match. Samples went out three days after the layout was approved, and the production batch followed on the agreed schedule.
The same four steps apply to your project:
- Review. Share the electrical requirements, connector interface, cable schedule, and site layout for an initial feasibility review.
- Sample. Prototype samples in 3 days; custom tooling in 20 days.
- Approve. Confirm the selected configuration, drawing, labels, and applicable documentation before production release.
- Deliver. Project-specific assemblies with agreed inspection, packing, and delivery requirements.
Project outcome
The DC distribution runs shipped with one-key locking joints, factory-terminated connections, and keyed polarity pairs, all documented against the site layout. The crew on site assembled the joints without field crimping, and the polarity control removed the reversal risk from their seasonal changeover checklist.
We publish project-specific figures such as installation time, measured temperature rise, and maintenance intervals only when project records back them up. Ask for the project summary pack under NDA.
Why this greenhouse microgrid wiring holds up in high humidity
| Mating cycles | 500+ on the push-in latch, sized for seasonal lighting reconfiguration |
| Contact resistance | ≤0.5mΩ at 100mA |
| Operating range | -40°C to +125°C |
| Waterproof / flame retardant | IP67 / V-0 (UL94) |
| System voltage | 1500V DC |
| Contact finish | Silver-plated T2Y copper |
Real customer quote goes here, to be added when the horticultural enterprise or EPC approves one.
Quality and compliance
The CN series energy storage connectors used in this project are certified to UL 1977 and UL 4128, carry CE marking, and are RoHS compliant. Certification documents are provided per delivered part number. UL 1977 covers component connectors for use in power applications. UL 4128 covers mating halves of intercell and intertier connectors for battery systems. CE marking follows the applicable European directives; see the European Commission CE marking guidance. PVLinkTech operates to IATF16949, ISO9001, ISO13485, and ISO14001 quality systems.
About IEC 62619 on this project: IEC 62619 is the safety standard for the industrial lithium battery system used in this microgrid, not for the interconnecting connectors. The battery storage system in the project is qualified to IEC 62619:2022. Our supply scope covers the CN series DC connectors and cable assemblies between battery, conversion, and lighting distribution. See IP Code for what the IP67 rating does and does not cover.
Engineering note: current rating, temperature rise, and IP protection depend on final cable size, ambient conditions, and the complete system design. Contact resistance values shown are per the product specification sheet at 100mA test current. Confirm the approved configuration with an applications engineer.
Typical applications
- Greenhouse microgrid wiring for agri-PV sites coupling rooftop solar, battery storage, and LED crop lighting, as in this agrivoltaics configuration
- Battery-to-inverter and battery-to-distribution DC paths in commercial and industrial microgrids
- High-current interconnects for LED horticultural lighting zones and seasonal lighting reconfiguration
- Custom high-current wiring for energy-storage equipment OEMs, greenhouse EPCs, and integrators
- Replacement and service wiring kits for installed microgrid and greenhouse power systems
Scope: this case study covers power connectors and custom cable assemblies, not the supply of a complete battery energy storage system.
Frequently asked questions
Engineering guidance, wiring rules, and certification details for high-current greenhouse microgrid installations.
For the 300A paths in this greenhouse microgrid wiring, the CN10 is rated up to 300A with 50 / 70 / 95mm² cable. The series covers 70A to 500A, so smaller lighting distribution circuits can use the same locking system at a lower rating.
IP67 applies to a correctly mated assembly: the seal keeps moisture out of the contact cavity under temporary immersion and is the right baseline for high-humidity greenhouse duty. Keep housings mated when energized, verify seal condition during seasonal changes, and confirm the final configuration with an applications engineer, because humidity performance also depends on cable spec and installation.
Positive and negative housings are visually distinct by color, and the approved configuration for this project included keyed, polarized mating halves, so a reversed pair cannot be closed in the first place.
At or below 0.5mΩ measured at 100mA on the CN10 through CN14 models; the CN06 and CN08 models are rated at or below 0.2mΩ.
IEC 62619 is the safety standard for the lithium battery system, not for the connectors between system components. The battery storage system in this project is qualified to IEC 62619:2022. Our supply scope is the DC connectors and cable assemblies, and certification is provided per delivered part number.
Yes. Assemblies are factory-terminated, cut to length, and labeled per your site layout and cable schedule, with assembly drawings and batch marking on request, so on-site crews install rather than crimp.
From 10mm² at 70A up to 185mm² at 500A across the series. The CN10 used on the main paths accepts 50, 70, or 95mm² (3/0 AWG at the top rating).
Prototype samples in 3 days; custom tooling in 20 days.
Need a greenhouse microgrid wiring review for your project?
Send your electrical requirements, cable schedule, and site layout. We will review the DC wiring configuration and come back with a connector and cable assembly proposal sized for the environment it has to survive.
More case studies
- BESS Cabinet Wiring — 5MW/10MWh Germany
- 1500V Solar Connectors — 120MW Indonesia PV Plant
- Solar PV Connector Solutions
- Battery Storage Connection Solutions
