The solar industry just got a major upgrade with EG4’s innovative Busbar PCS feature—a game-changer for residential and commercial solar installations. Say goodbye to costly and time-consuming main panel upgrades. With Busbar PCS, you can oversize inverters, stay compliant with NEC 705.13, and meet modern energy demands without breaking the bank.
The Problem: Main Panel Upgrades Are a Bottleneck
The NEC 120% rule limits inverter feedback current in a 200A main panel to just 32A. For many households and businesses, this restriction is a roadblock. With the rise of electric vehicles, battery storage, and high-power appliances, 32A often falls short of today’s energy needs. The traditional fix? A costly main panel upgrade that can set installers and customers back thousands of dollars and weeks of time.
That’s where EG4’s Busbar PCS comes in.
The Solution: Busbar PCS Saves Time, Money, and Hassle
Busbar PCS is a smart, automated Energy Management System (EMS) designed to comply with NEC 705.13 while eliminating the need for main panel upgrades. By dynamically adjusting inverter output in real-time, Busbar PCS ensures your system stays within safe electrical limits, allowing you to install larger solar systems without expensive overhauls.
Key Benefits of Busbar PCS
- Avoid Costly Upgrades: No need to replace or upgrade your main panel to accommodate larger inverters.
- NEC Compliance Made Easy: Stay within NEC 705.13 limits without sacrificing system capacity.
- Cost-Effective: Save thousands on installation costs while maximizing energy production.
- Safe and Reliable: Prevents overloading and fire hazards with automated current regulation.
- Flexible: Ideal for both residential and commercial installations with growing energy demands.
How Busbar PCS Works
Busbar PCS operates like a built-in safety net for your electrical panel. Here’s how it ensures compliance and safety:
- Real-Time Monitoring: EG4 hybrid inverters continuously track the total power being drawn from the grid and the inverter, helping you maximize efficiency and control.
- Threshold Trigger: If the current exceeds 80% of the rating of the main panel busbar, the inverter waits 20 seconds to avoid reacting to temporary spikes.
- Controlled Adjustment: If the overcurrent persists, the inverter reduces or stops exporting power within 30 seconds, protecting the panel.
- Smooth Recovery: Once the current drops below 80% for 30 seconds, the inverter gradually restores output to prevent surges.
This dynamic process ensures your system operates safely and efficiently, even with oversized inverters.
UL 3141 Certifications for EG4 Hybrid Inverters
EG4 hybrid inverters are backed by UL 3141 certifications, ensuring compliance with stringent safety and performance standards for Power Control Systems (PCS). These certifications, aligned with UL 3141, UL 1741, and the CRD for PCS, confirm that our inverters meet industry standards for safe operation in distributed energy systems. Key specifications include a maximum input voltage of 600V DC, battery voltage range of 40-60V DC, nominal AC voltage of 208Vac/240Vac, and nominal AC frequency of 60Hz. Below are the UL 3141 Certificates of Compliance for our inverters:
EG4 hybrid inverters continuously track the total power being drawn from the grid and the inverter, helping you maximize efficiency and control.
Ready to Revolutionize Your Solar Installations?
EG4’s Busbar PCS is more than a feature—it’s a smarter, safer, and more cost-effective way to expand solar capacity. Whether you’re a distributor, EPC, or professional installer, Busbar PCS is the solution you’ve been waiting for.
Save time. Save money. Stay compliant.
