•

EG4

EG4 314Ah All-Weather Battery + FLEXBOSS21 | 16kWh Solar System

SKU K0280
$7,960.00
$7,960.00
🔥 — sold in the last —
— people are looking at this right now

Estimated shipping time

You can typically expect your items to arrive within 4–7 business days, depending on your location and product availability.

What is your Return Policy?

At Northgrid Supply, we want every customer to shop with confidence. If something doesn’t go as planned, we’ve made returns and refunds simple and fair. Here’s how it works:

1. Return Window

You can request a return within 30 days of receiving your order. Unfortunately, we’re unable to accept returns after that time frame.

2. Who Pays for Return Shipping?

  • If your item arrives damaged, defective, or incorrect, we’ll cover the return shipping cost.
  • If you’re returning an item because you changed your mind, you’ll be responsible for return shipping fees.

3. Damaged or Defective Items

Received something broken or not working properly? Contact us within 30 days. We’ll provide a prepaid return label and once the item is returned and inspected, we’ll issue either a full refund or a replacement—including any original shipping costs.

4. Changed Your Mind?

If you no longer want the item, you can return it within 30 days—as long as it's unused, in its original packaging, and in resellable condition. You’ll need to handle the return shipping, and once we receive and inspect it, we’ll refund the product cost (excluding shipping).

5. Refund Processing

Once we receive and approve your return, we’ll send a confirmation email and issue a refund to your original payment method within 7 business days. Please allow additional time for banks or credit card companies to process and reflect the refund.

If it’s been over 10 business days since your refund was approved and you still don’t see it, contact us at support@northgridsupply.com and we’ll look into it immediately.

6. Restocking Fees

In some cases, a restocking fee may apply depending on the item and return reason. If applicable, we’ll clearly communicate this during your return request process.

The EG4 WallMount 314Ah All-Weather Battery paired with the FlexBOSS21 inverter is a high-capacity energy storage solution designed for residential and small commercial systems. It combines a rugged outdoor-rated lithium battery with a high-performance hybrid inverter to support solar storage, backup power, and full off-grid capability. Built with LiFePO4 technology, the system delivers long service life, improved thermal stability, and reliable performance. The wall-mounted battery is engineered for outdoor installation, featuring a sealed enclosure and integrated heating system to maintain consistent operation in varying climates. The hybrid inverter efficiently manages energy from solar, battery, and grid sources, ensuring uninterrupted power delivery.

Key Features

  • High-Capacity Storage: 16kWh battery capacity with a 314Ah rating for extended backup.

  • Advanced Chemistry: 51.2V LiFePO4 battery chemistry ensures a long lifespan and enhanced safety.

  • Outdoor Protection: IP-rated all-weather enclosure designed specifically for outdoor installations.

  • Powerful Inverter: FlexBOSS21 hybrid inverter features high solar input capability.

  • Massive PV Support: Supports up to 21kW PV input for maximum solar energy utilization.

  • High Output Capacity: Delivers up to 12kW output on battery-only power and approximately 16kW with solar assist.

  • Optimized Solar Harvest: Three MPPT inputs provide superior solar performance across different array orientations.

  • Automated Security: Built-in smart BMS provides automatic configuration and comprehensive circuit protection.

  • Scalable Architecture: Expandable system allows for up to 32 batteries to be connected in parallel.

  • Smart Connectivity: Features remote monitoring via a dedicated app with CAN and RS485 system communication.

Performance and Efficiency

  • Stable Power Delivery: The system is engineered to deliver reliable and efficient power under varying energy demands.

  • Long Cycle Life: LiFePO4 battery technology ensures safe operation and a high number of charge cycles.

  • Maximum Energy Usage: The FlexBOSS21 inverter utilizes high conversion efficiency and advanced load management to maximize solar production.

Document Links


Battery Downloads

Inverter Downloads

Customers also bought

    Frequently Asked Questions

    • FREE SHIPPING IN USA

      Free shipping with every order

    • SATISFACTION GUARANTEED 

      If your order arrives defective or fails to

      function properly, you will receive a full 100% refund!

    • PREMIUM CUSTOMER SUPPORT

      Connect with us through live chat, email, or

      phone, and we will address any questions you may have!

    • SECURE ENCRYPTED PAYMENTS

      We utilize advanced encryption to

      ensure there is never an issue with your privacy.

    Frequently Bought Together

    Total price$16,269.97