This is a grid-tied, hybrid inverter energy storage system: an EG4 18kPV hybrid inverter paired with EG4 all-weather wallmount battery capacity. The system is sold as a configurable package, with total usable storage ranging from 14.3kWh up to 85.8kWh depending on how many battery modules you add, and PV input support from 18kW to 54kW.
Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
Why This Configuration Matters
Sizing a grid-tied hybrid system means matching three things: PV array capacity, inverter throughput, and battery reserve. This package covers a wide band on purpose — a small off-grid cabin and a whole-home backup system land in very different places on the 14.3kWh to 85.8kWh range. Chemistry is LiFePO4 (Lithium Iron Phosphate), which is the standard for stationary storage because of its thermal stability and long cycle life compared to lead-acid alternatives. Certification: UL9540, which applies to energy storage systems assessed as a complete unit — inverter and battery working together.
Battery Characteristics
- Chemistry: LiFePO4 (Lithium Iron Phosphate)
- Form factor: EG4 wallmount, rated for all-weather (outdoor-capable) installation
- Usable capacity range across configuration options: 14.3kWh – 85.8kWh
- Inverter: EG4 18kPV hybrid inverter
- Supported PV input range: 18kW – 54kW
- Certification: UL9540
Wiring & Configuration Limits (Series/Parallel)
This is a modular ESS: capacity scales by adding wallmount battery units to the 18kPV hybrid inverter platform, which is why the listed range spans 14.3kWh to 85.8kWh. [NEEDS VERIFICATION] — the exact number of battery modules, per-module kWh, and the specific series/parallel wiring topology used to reach each capacity tier are not stated in the available data. Do not assume module counts or wiring diagrams; confirm the exact bill-of-materials for your target kWh against the manufacturer documentation in the Resources tab before ordering or installing.
Not compatible with: This is not a portable or off-grid-only battery bank — it is documented here as a grid-tied hybrid inverter ESS. It is not intended to be paired with third-party inverters outside the EG4 18kPV platform based on the data provided. Do not mix battery modules of different ages or from different production batches within the same bank.
Pro-Installer Tip
Mixing battery modules purchased at different times inside the same wallmount bank is a common source of premature capacity loss. Even within the same LiFePO4 product line, modules with different calendar age or cycle history will drift in internal resistance and state-of-charge behavior, which forces the weakest module to bottleneck the whole bank and can trip a BMS lockout under load. Buy all modules for a given bank in one order, and verify pack voltages with a shunt-based battery monitor before commissioning. As a professional standard, plan discharge depth around 80-100% DoD for LiFePO4, but confirm the manufacturer's recommended DoD for this specific model in the Resources tab before setting inverter cutoffs.
Key Benefits
- LiFePO4 chemistry supports substantially longer cycle life than lead-acid for daily cycling applications.
- All-weather wallmount rating supports installation flexibility for garages, utility rooms, or exterior walls (confirm exact IP/temperature rating in manufacturer documentation).
- Hybrid inverter architecture allows grid-tied operation with battery backup from a single inverter platform.
- Scalable capacity (14.3kWh–85.8kWh) lets you size the bank to the load instead of over- or under-buying.
- UL9540 certification reflects system-level safety testing of the inverter and battery combination.
Technical Table
| Spec | Value |
|---|---|
| Chemistry | LiFePO4 |
| Usable Capacity Range | 14.3kWh – 85.8kWh |
| Inverter Model | EG4 18kPV Hybrid Inverter |
| Supported PV Input | 18kW – 54kW |
| System Type | Grid-Tied, Hybrid Inverter ESS |
| Certification | UL9540 |
| Battery Form Factor | Wallmount, All-Weather |
| Max Continuous Discharge (A) | [NEEDS VERIFICATION] |
| Cycle Life | [NEEDS VERIFICATION] |
| Operating Temp Range | [NEEDS VERIFICATION] |
| Terminal Type | [NEEDS VERIFICATION] |
| Weight | [NEEDS VERIFICATION] |
| Dimensions | [NEEDS VERIFICATION] |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
This system is designed as a grid-tied hybrid solution built around the EG4 18kPV inverter and EG4 wallmount all-weather battery modules. It supports PV arrays sized from 18kW to 54kW.
Compatible with: EG4 wallmount all-weather battery modules scaled to reach 14.3kWh–85.8kWh usable capacity; PV arrays within the 18kW–54kW input range.
NOT compatible with / NOT included: This listing does not confirm compatibility with non-EG4 inverters. A standard lead-acid charger is NOT appropriate for this LiFePO4 system. Mounting hardware, PV panels, conduit, and disconnects are not confirmed as included based on the data provided — verify inclusions against the manufacturer documentation before ordering.
Options & SKUs
| Variant | SKU | Price (USD) |
|---|---|---|
| variable parent (8 variations) | K0756-V | $7,289.97 |
The manufacturer data provided lists this product as a variable parent with 8 underlying variations, but individual variant titles, SKUs, and per-variant pricing were not included in the source data. Contact us before ordering if you need a specific capacity tier confirmed — we always reply back.
FAQ
What is the usable capacity range of this system?
Usable capacity spans 14.3kWh to 85.8kWh depending on the battery configuration selected.
Is this an off-grid or grid-tied system?
This is a grid-tied hybrid inverter system built around the EG4 18kPV inverter.
What size PV array does this support?
The system supports PV input from 18kW to 54kW.
What battery chemistry does this use?
LiFePO4 (Lithium Iron Phosphate).
Is this system certified?
Yes, it carries UL9540 certification.
Warranty & Support
Warranty terms for this system are not included in the data provided for this draft. Please refer to the "Resources (System Manuals and Warranty)" Tab above for manufacturer warranty coverage. If you have questions about which configuration fits your PV array or backup goals, ask us before you order — we always reply back.
