This is a wallmount, all-weather LiFePO4 battery paired with an EG4 12kPV hybrid inverter, built as a grid-tied energy storage system (ESS) for home solar. The system scales from 14.3kWh up to 85.8kWh of storage and supports 12kW to 36kW of PV input, depending on how you configure it.
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.
Field-Tested Perspective
A hybrid ESS like this one lives at the intersection of battery chemistry, inverter programming, and site wiring. Before you spec a system, you need to know what the battery bank can deliver continuously, what the inverter can push through to your panel, and how the two are allowed to be configured together. The manufacturer data provided for this listing is limited to the product title and pricing structure — every technical figure below that isn't in that title is flagged as unverified rather than guessed at. Confirm all missing specs against the manufacturer documentation before you finalize a design.
Battery Characteristics
Chemistry: LiFePO4 (Lithium Iron Phosphate), based on the EG4 product family naming and the "All Weather" designation. [NEEDS VERIFICATION] — chemistry not independently confirmed in supplied data beyond product naming convention.
Group Size / Form Factor: Wallmount battery unit. [NEEDS VERIFICATION] — physical dimensions and weight not provided.
Capacity Range: 14.3kWh to 85.8kWh total system storage (per title). Individual battery module Ah/Wh rating is not broken out in the supplied data. [NEEDS VERIFICATION]
Inverter: 12kPV hybrid inverter, supporting 12kW to 36kW of PV array input (per title). [NEEDS VERIFICATION] for inverter continuous output rating, surge rating, and AC voltage class.
Wiring & Configuration Limits (Series/Parallel)
The 14.3kWh–85.8kWh capacity range indicates this system is designed for module expansion (adding battery units to scale storage), and the 12kW–36kW PV range indicates the inverter side also scales, likely through paralleling multiple inverters. Exact series/parallel wiring limits, maximum number of battery modules per stack, and maximum number of inverters per system are not included in the supplied data. [NEEDS VERIFICATION]
Do not wire battery modules or inverters together outside of the manufacturer's documented configuration limits. Do not assume this system uses the same series/parallel rules as other EG4 or BigBattery products — confirm against this specific model's documentation before installation.
Pro-Installer Tip
Undersized or oversized module counts are one of the most common return reasons on scalable ESS platforms. Wiring beyond the rated series or parallel limit — even by one module — can cause cell imbalance across the stack and trip a BMS lockout that looks like a "dead" battery to an unprepared installer. Before you commission a multi-module system, verify the manufacturer's maximum stack count with a shunt-based battery monitor at the DC bus, and log baseline voltage per module. On lithium systems designed for daily cycling, plan your usable capacity around an 80-100% depth of discharge (DoD) target — but confirm this system's actual DoD rating in the manufacturer documentation before you size the system for a customer's daily load. Since exact configuration limits are [NEEDS VERIFICATION] for this listing, do not finalize a wiring diagram until you've pulled the install manual referenced in the Resources tab.
Key Benefits
- Wallmount form factor for indoor or protected installation footprint.
- "All Weather" rating suggests extended environmental tolerance, though exact operating temperature range is [NEEDS VERIFICATION].
- Scalable from 14.3kWh to 85.8kWh, allowing a system to grow with load demand.
- Hybrid inverter architecture supports grid-tied operation with 12kW to 36kW of PV input capacity.
- UL9540 reference in the product title indicates this system is intended to meet that safety standard for energy storage systems. [NEEDS VERIFICATION] — certificate/listing not supplied in DATA.
Technical Table
| Spec | Value |
|---|---|
| Voltage | [NEEDS VERIFICATION] |
| Capacity (Total System) | 14.3kWh - 85.8kWh |
| Capacity (Ah) | [NEEDS VERIFICATION] |
| Chemistry | LiFePO4 (based on product family naming) [NEEDS VERIFICATION] |
| Inverter PV Input Range | 12kW - 36kW |
| Inverter Model | 12kPV Hybrid Inverter |
| Max Continuous Discharge (A) | [NEEDS VERIFICATION] |
| Max Continuous Charge (A) | [NEEDS VERIFICATION] |
| Peak Discharge | [NEEDS VERIFICATION] |
| Cycle Life | [NEEDS VERIFICATION] |
| Dimensions | [NEEDS VERIFICATION] |
| Weight | [NEEDS VERIFICATION] |
| Terminal Type | [NEEDS VERIFICATION] |
| Operating Temp Range | [NEEDS VERIFICATION] |
| Low-Temp Charging Protection | [NEEDS VERIFICATION] |
| Certifications | UL9540 (referenced in title) [NEEDS VERIFICATION] |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
This system is designed as a matched battery-and-inverter ESS package (EG4 wallmount battery + EG4 12kPV hybrid inverter) for grid-tied home solar applications supporting 12kW to 36kW of PV input.
What it is NOT: this is NOT a standalone battery for use with a third-party inverter unless that pairing is explicitly documented by the manufacturer — [NEEDS VERIFICATION] on cross-brand inverter compatibility. This is NOT confirmed for off-grid-only operation without further verification, since the listing specifies "Grid-Tied." Do not assume standard lead-acid or AGM chargers are compatible with this system; if this battery is LiFePO4 as its naming suggests, a lithium-specific charge profile is required, and this has not been confirmed in the supplied data. [NEEDS VERIFICATION] on charger/charge-controller compatibility.
Positive fitment claims beyond "battery + 12kPV inverter as a package, scalable across the stated kWh and kW ranges" are not detailed in the supplied data.
FAQ
Q: What chemistry is the EG4 wallmount battery?
A: The product naming and "All Weather" designation point to LiFePO4 (Lithium Iron Phosphate), consistent with the EG4 product family, but this has not been independently confirmed in the manufacturer data supplied for this listing. Confirm chemistry in the Resources tab before purchase.
Q: How much storage capacity does this system support?
A: The system scales from 14.3kWh to 85.8kWh of total storage, based on the product title.
Q: What size solar array can this system support?
A: The 12kPV hybrid inverter configuration supports 12kW to 36kW of PV input, based on the product title.
Q: Is this system rated for a specific safety standard?
A: The product title references UL9540, a standard for energy storage systems. The specific certification listing was not included in the supplied manufacturer data, so confirm this directly in the Resources tab.
Q: Can I add more battery modules or inverters later to expand the system?
A: The kWh and kW ranges in the title suggest this platform is modular, but exact series/parallel wiring limits and maximum module counts were not included in the supplied data. Confirm expansion limits with the manufacturer documentation before adding modules.
Warranty & Support
Warranty terms for this system were not included in the supplied manufacturer data. Refer to the "Resources (System Manuals and Warranty)" Tab above for warranty coverage details before you order. If you have questions about this system that aren't answered on this page, ask us before you order — we always reply back.
