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EG4

BigBattery ETHOS & EG4 FlexBOSS18 | 13kW Solar Battery System

SKU K0230
$6,275.00
$6,275.00
🔥 — sold in the last —
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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.


ETHOS EG4 FlexBOSS18 ESS

The ETHOS Energy Storage System (ESS) is a high-performance solution engineered for both residential and commercial applications. It combines advanced LiFePO4 (Lithium Iron Phosphate) battery technology with the powerful 13kW EG4 FlexBOSS18 hybrid inverter to deliver intelligent energy management. This system is designed for grid-tied, hybrid, and backup power applications, ensuring a future-ready, scalable energy supply.

Key Features

  • Powerful Output: Features the 13kW EG4 FlexBOSS18 hybrid inverter for high-capacity power delivery.

  • High-Capacity Storage: Modular 10.24kWh energy storage modules expandable to meet increasing energy demands.

  • Premium Chemistry: Built with LiFePO4 technology for maximum safety, thermal stability, and consistent performance.

  • All-Weather Performance: IP65 and NEMA 4X rated enclosure allows for safe indoor or outdoor installation.

  • Advanced Safety: Includes an integrated Battery Management System (BMS) and built-in fire protection.

  • Flexible Configurations: Supports grid-tied, hybrid, and off-grid configurations with real-time monitoring.

Performance and Efficiency

  • High Cycle Life: Engineered for 6,000+ cycles, providing over a decade of reliable daily use.

  • Optimized Charging: Features closed-loop communication for chemistry-aware charging and improved safety.

  • Reliable Efficiency: Achieves 99.9% battery charging efficiency through advanced MPPT controllers.

Product Details

  • Battery Specifications: 10.24kWh capacity per module, 48V nominal voltage, and 200Ah capacity.

  • Inverter Specifications: 13kW hybrid output with 120/240V split-phase AC output.

  • Operating Range: Discharge temperature range from -4°F to 140°F (-20°C to 60°C).

  • Dimensions: System stands 43.3” H x 26.5” W x 6.7” D.

  • Weight: Total system weight is approximately 273 lbs (123.8 kg).

What’s Included

  • ETHOS stackable lithium battery modules (10.24kWh total).

  • ETHOS Control Box with integrated monitoring system.

  • EG4 FlexBOSS18 13kW hybrid inverter.

  • All necessary mounting components and power cables.

Applications

  • Residential solar energy storage and home backup.

  • Commercial energy storage for peak energy cost management.

  • Off-grid installations and emergency backup power systems.

Safety and Protection

  • Overcharge and over-discharge protection via advanced BMS.

  • Temperature monitoring and integrated short circuit/overload protection.

  • UL 9540, UL 9540A, and UL 1973 certified for the highest industry safety standards.

Expandable Design The modular architecture of the ETHOS system allows for easy expansion as your energy needs grow. Additional battery modules can be stacked to increase capacity, making this a scalable, long-term energy solution.


Document Links

Battery Downloads:

Inverter Downloads:


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