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Big Battery

BigBattery EG4 WallMount 280Ah All Weather | 48V – 14.3kWh | UL1973 | Home Battery Backup LFP

SKU FEWPP-48143-G1
$3,499.00
$3,499.00
Free Shipping Contiguous USA
Warranty Info View coverage → 30-Day Returns View terms →
Questions? Give us a call +1 239-310-4096
In stock

Estimated Delivery: 4-7 Business Days from Order Date

Free Standard Shipping on All Orders to the Contiguous USA

30 Day Return Policy with 25% restocking fee applies to change-of-mind returns. See full policy

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 Wildhaven Curator, 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@wildhavencurator.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.

Big Battery

BigBattery EG4 WallMount 280Ah All Weather | 48V – 14.3kWh | UL1973 | Home Battery Backup LFP

SKU FEWPP-48143-G1
$3,499.00
BigBattery EG4 WallMount 280Ah All Weather | 48V – 14.3kWh | UL1973 | Home Battery Backup LFP
Warranty & Support Big Battery

At Wildhaven Curator, we’re here to help with warranty questions about your BigBattery purchase. Our team can help identify the applicable coverage and coordinate manufacturer support.

Manufacturer Warranty Overview

Coverage depends on the product, purchase date, and applicable manufacturer terms. BigBattery provides lifetime technical support and automatically records battery warranties through serial numbers and QR codes.

Coverage and Duration

• BigBattery Batteries: Purchases after October 2024 carry 12-year repair/replacement coverage for material and workmanship defects.

• Earlier Battery Purchases: Purchases before October 2021 carry three-year coverage; purchases from October 2021 through October 2024 carry ten-year coverage.

• BigBattery Chargers and Accessories: One-year coverage from purchase for qualifying defects under normal use.

• BigBattery APEX-6.5K and APEX-10K Inverters: Five-year limited warranty. Contact us for model-specific eligibility, exclusions, and service arrangements.

• Other Manufacturers: Products branded EG4, Sol-Ark, Victron, Growatt, AIMS, or another manufacturer follow that manufacturer’s warranty.

Battery Warranty Service

BigBattery assesses returned batteries before approving service. Repairs or refurbished replacements may be provided.

If a new replacement is provided, beginning in year two, the customer may owe one-twelfth of its cost per year of ownership.

Capacity-loss claims below 25% are excluded. Manufacturer capacity testing is free; results determine eligibility.

Conditions and Exclusions

Battery exclusions include misuse, improper installation, environmental damage, improper charging, over-discharge, and unauthorized modification/disassembly.

If charge falls below 10%, recharge within 48 hours. Contact BigBattery immediately if charging is impossible.

Charger coverage excludes misuse, physical damage, unauthorized work, incompatible equipment, and operation outside specifications. IP65 charger coverage is nontransferable; repaired/replacement chargers retain the original warranty dates.

Battery Warranty Transfers

• Stationary batteries must remain at the original location; ownership-transfer documentation must be emailed within 30 days.

• Mobile batteries must remain in the original vehicle/system, with original purchase proof and a documented ownership chain.

How to Submit a Warranty Inquiry or Claim

  1. Email support@wildhavencurator.com with your order number and proof of purchase.
  2. Include the product model, serial number, issue description, and available photographs.
  3. Our team can help coordinate troubleshooting with BigBattery.
  4. Obtain return instructions before shipping and follow the required packaging procedure.

Manufacturer support: Support@BigBattery.com
Manufacturer phone: (818) 280-3091

Shipping, Labor, and Related Costs

• Battery claims: Eligible first-year claims receive round-trip shipping within the continental U.S.; customers pay both directions afterward. Disconnection, service interruption, and repacking are excluded. International customers pay shipping.

• IP65 charger claims: Customers prepay shipment to the manufacturer. Confirm other shipping costs before returning.

• APEX claims: Contact us to confirm freight, labor, and service costs before arranging work.

Warranty Assistance

For help understanding coverage or coordinating support, contact Wildhaven Curator:

Email: support@wildhavencurator.com
Phone: +1 239-310-4096

Need help with this product? support@wildhavencurator.com
+1 239-310-4096

This wall-mounted lithium iron phosphate battery provides 14.3kWh of storage and 280Ah capacity for residential solar, off-grid, and home backup systems. Its weather-resistant construction supports indoor and outdoor installation.

Integrated self-heating supports cold-weather use, while a battery management system monitors voltage, current, and temperature. EMP protection, dual fire arrestors, and an emergency stop provide additional safeguards.

Quick-connect terminals simplify connections, and an LCD displays battery status and diagnostics. The battery offers 8,000+ cycles at 80% depth of discharge.

Key Features

  • Weather Resistance: IP65-rated construction.

  • Cold-Weather Support: Integrated self-heating.

  • Battery Monitoring: LCD with real-time BMS information.

  • Safety Systems: EMP protection, dual fire arrestors, and emergency stop.

Specifications

  • Nominal Voltage: 51.2V

  • Chemistry: Lithium Iron Phosphate (LiFePO4)

  • Energy Capacity: 14.3kWh

  • Capacity: 280Ah

  • BMS Charging Voltage (Bulk/Absorb): 56.0V (±0.8V)

  • Recommended Charging Voltage (Bulk/Absorb): 56.2V (±0.2V)

  • Recommended Float Setting: 54V (±0.2V)

  • Recommended SoC Cutoff: 20%

  • Maximum Continuous Charge Current: 140A

  • Maximum Continuous Discharge Current: 140A; 200A for up to 30 minutes

  • Recommended Charge Current: 60–140A

  • Recommended Discharge Current: 60–140A

  • Maximum Continuous Discharge Rate: 10,240W

  • Voltage: 56V

  • Power Consumption: 224W

  • Internal Temperature Cutoffs: ≤32°F (On) | ≥41°F (Off)

  • Charging Temperature: 32°F–122°F (0°C–50°C)

  • Discharging Temperature: -4°F–131°F (-20°C–55°C)

  • Storage Temperature: 32°F–113°F (0°C–45°C)

  • Operating Altitude: <16,404 ft (<5,000 m)

  • Communications: RS485 | CANBus

Size Guide

  • Depth: 9.1 in (232 mm)

  • Width: 22.3 in (566 mm)

  • Height: 36.1 in (916 mm)

  • Weight: 308.6 lbs (140 kg)

Compatibility

UL 9540 Grid-Tied Systems with Closed-Loop Communication: EG4 12kPV, 18kPV, FlexBoss18, and FlexBoss21.

Off-Grid Non-UL 9540 Installations with Closed-Loop Communication: All BigBattery APEX inverters and all EG4 inverters.

Included

  • 1 battery

  • 1 mounting bracket

  • 1 X bracket

  • 6 expansion bolts

  • 1 red & black battery-to-inverter power cable set (3.3 FT)

  • 1 battery-to-inverter communication cable (5 FT)

Warranty

Warranty: 10-year EG4 manufacturer warranty

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