EG4 GridBOSS + FlexBOSS-21 - 14.3kWh Indoor Battery & 12kW Hybrid Inverter Battery Package
Questions about this product
Questions about this product
Delivery and shipping
Delivery and shipping
Orders are typically processed within 1 to 2 business days from the time of purchase, excluding holidays and weekends.
Shipping times and cost will vary depending on the product and your location.
On average:
Ontario and Quebec: 2 to 5 business days
Western Canada: 4 to 7 business days
Atlantic provinces: 4 to 8 business days
Northern or remote areas: Contact us to confirm
System Load Calculator
* Usage / consumption may vary.
Power your off-grid or grid-tied system with confidence using the EG4 GridBOSS + FlexBOSS-21 Kit—a complete indoor-rated energy storage solution built for performance, safety, and expandability. This system includes the advanced EG4 FlexBOSS-21 (V1.1) Hybrid Inverter, a 14.3kWh WallMount Indoor Battery, the EG4 GridBOSS Microgrid Interconnection Device, and a custom Indoor Buildable Conduit Box—all designed for seamless installation and CSA-compliant integration.
With a massive 21kW PV input, intelligent smart load control, and 600V DC solar support, the FlexBOSS-21 is ideal for both residential and light commercial energy setups. Paired with the robust indoor-rated 14.3kWh battery and GridBOSS MID, this bundle offers full system control, monitoring, and protection in a clean, wall-mounted form factor.
What’s Included:
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EG4 FlexBOSS-21 Hybrid Inverter (V1.1) – 48V, Split-Phase, 12kW Output, 21kW PV Input
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EG4 Indoor Buildable Conduit Box – Streamlined cable protection and NEC-compliant spacing
System Highlights:
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Massively scalable solar capacity with up to 21kW PV input and three MPPTs
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Smart load management, generator integration, and multi-mode inverter control
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Remote monitoring and alerts via EG4 app and cloud dashboard
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Parallel up to 16 FlexBOSS-21 units for 256kW continuous output
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Safety-first design with rapid shutdown, arc-fault detection, and ground fault protection
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Wall-mounted 14.3kWh lithium iron phosphate battery with integrated LCD and self-heating
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Internal 600A busbars for parallel installations without external wiring blocks
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Clean cable routing with buildable conduit box for CSA/NEC compliance
Canadian Installation Notes:
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The EG4 GridBOSS is not service entrance rated. A 100A or 200A disconnect is required between the electrical meter and the inverter to meet ESA requirements.
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The GridBOSS MID includes a 90A breaker compatible with the FlexBOSS-21. Other inverters (e.g., 18kPV or 12kPV) require separate breakers.
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To meet UL certifications inside the GridBOSS MID, copper wire must be used.
Specifications Summary:
FlexBOSS-21 Inverter
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Output Power: 12kW continuous (16kW w/ PV input), 24kW surge
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PV Input: 21kW, 600V DC max
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Voltage: 120/240V split-phase
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Dimensions: 29.5" x 20.5" x 11.2" | Weight: 88 lbs
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Warranty: 10 years
WallMount Battery
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Energy: 14.3kWh | Voltage: 51.2V | Capacity: 280Ah
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Cycle Life: 8000+ (80% DoD) | Weight: 282 lbs
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Communication: RS485/CAN | Certifications: UL 1973, UL 9540A
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Integrated LCD screen, self-heating, emergency shutoff compatible
GridBOSS MID
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Max Current: 200A | Hybrid Ports: 3 x 90A | Smart Ports: 4 x up to 125A
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Service entrance capable with 200A Eaton CSR25K breaker (sold separately)
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Operating Temp: -40°F to 140°F | Warranty: 10 years
Why Choose This Bundle?
This is the most flexible, powerful, and installer-friendly EG4 energy system to date—built for the Canadian climate and code. Whether you're powering a home, workshop, or off-grid cabin, the EG4 FlexBOSS-21 + GridBOSS Kit gives you serious power, safe installation, and total control—all in one streamlined package.
To serve our customers across Canada, whether you're in a major city or completely off the grid, many of our products are shipped via freight delivery to ensure safe and efficient transport. Depending on your location and the item, you’ll have the option to pick up from a nearby warehouse terminal or request home delivery.
Free Terminal Pickup on Most Large Items
Most large items we sell, including appliances, solar kits, and other freight-shipped products, include free shipping to your closest warehouse terminal.
Your order will be delivered to the nearest terminal based on your location, where you can pick it up at your convenience.
Need it delivered to your home or cabin? We can set that up for you. There is a small additional fee for residential delivery.
Remote and Hard-to-Reach Locations
If you live in a remote area or outside standard freight zones, please contact us before placing your order.
Some rural locations may require additional charges or special delivery arrangements. We'll confirm everything with our freight partner before shipping.
Local Pickup Options Across Canada
We work with warehouse terminals in every province, so many of our products can be picked up locally to save on shipping costs.
Not all items are eligible, so if you're unsure at checkout, give us a call or send us an email and we'll confirm the best option for your area.
Shipping Times and Order Processing
Orders are typically processed within 1 to 3 business days from the time of purchase, excluding holidays and weekends.
Shipping times will vary depending on the product and your location. On average:
- Ontario and Quebec: 2 to 5 business days
- Western Canada: 4 to 7 business days
- Atlantic provinces: 4 to 8 business days
- Northern or remote areas: Contact us to confirm
We will provide tracking details when available once your order has shipped.
Receiving Freight Shipments
For large freight deliveries, you will receive a call from the carrier or your nearest terminal when your order is ready for pickup or delivery.
Important: Always inspect your shipment before signing any paperwork.
If the box or pallet is damaged:
- Do not sign the Bill of Lading (BOL) as "received in good condition"
- Instead, note the damage clearly on the BOL
- Or refuse the shipment if damage is significant
If no damage is recorded and the shipment is accepted, the freight carrier will consider it delivered in perfect condition. In that case, we cannot issue a refund or replacement. This is a strict freight carrier policy and applies to all deliveries.
Damaged or Missing Items
If there’s an issue with your shipment (whether it’s damage, missing parts, or anything unusual) please contact us within 48 hours of receiving the item. Be sure to include photos whenever possible, as these are often required to file a freight claim on your behalf. If the item was shipped to a terminal, it must be picked up within 48 hours or a $45/day storage fee will apply.
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. Shipping costs back to Canadian Off Grid are the responsibility of the customer and 15% restocking fee will apply.
To start a return, you can contact us atryan@canadianoffgriddepot.com. If your return is accepted, we’ll contact you to discuss options, as well as instructions on how and where to return your item. Items sent back to us without first requesting a return will not be accepted.
Payment & Security
Payment methods
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