By the PES Supply Editorial Team — Reviewed July 2026
EG4 Electronics has become one of the most disruptive names in residential and commercial energy storage, offering 48V lithium iron phosphate (LFP) batteries at some of the most aggressive price-per-kWh figures in the North American market. Headquartered in Dallas, Texas, EG4 built its reputation on server-rack-format batteries that prioritize installer-friendly design, broad inverter compatibility, and a cost structure that undercuts premium competitors by a wide margin. This brand guide covers EG4's full product lineup, certifications, warranty terms, and how their batteries compare — so you can specify with confidence.
PES Supply carries EG4 batteries among our catalog of 50,000+ SKUs from 169 authorized brands, with delivery in 7–10 business days. Browse our full solar battery selection or shop EG4 at PES Supply.
1. Company Overview
Founded in 2019 and based in Dallas, Texas, EG4 Electronics entered the energy storage market with a clear thesis: bring server-rack LFP batteries to the US residential and off-grid market at a price point that makes whole-home backup accessible. The company focuses exclusively on lithium iron phosphate (LiFePO₄) chemistry, citing its superior thermal stability, long cycle life, and cobalt-free supply chain as core advantages over NMC alternatives.
EG4's market position is best described as the cost leader among UL-listed LFP server-rack batteries. By controlling the cell sourcing, BMS design, and enclosure manufacturing, EG4 has driven street prices for a 5.12 kWh server-rack battery down to roughly $235–$280 per kWh — a figure that was unthinkable for UL-certified product just a few years ago. The company also manufactures a line of hybrid inverters (18kPV, 12kPV, 6000XP) designed to pair natively with its batteries for closed-loop communication.
EG4 operates with US-based engineering and Texas-headquartered customer support, and reports over 150,000 successful installations nationwide. The company has invested heavily in safety certifications, including UL 1973 recognized component status and UL 9540A fire-propagation testing, which has helped it gain traction with AHJs that previously rejected non-listed imports.
2. Current Product Lines
EG4's battery lineup centers on two form factors: server-rack batteries for rack-cabinet installations and wall-mount batteries for all-weather outdoor placement. All use LFP chemistry at 48V (51.2V nominal). Current models include:
- LifePower4 V2 (48V 100Ah) — 5.12 kWh server-rack battery, 100A BMS, UL 1973 / UL 9540A, 6,000+ cycles at 80% DoD. The most popular EG4 battery and a benchmark for value in the category. Street price ~$1,200–$1,470.
- LL-S (48V 100Ah) — 5.12 kWh server-rack battery with an integrated LCD touchscreen for real-time monitoring. 7,000+ cycles at 80% DoD. UL 1973, UL 9540A, UL 9540 listed. Street price ~$1,350.
- LifePower4 V2 (24V 200Ah) — 5.12 kWh server-rack battery at 24V for lower-voltage systems. Same cell chemistry and BMS platform.
- WallMount Indoor (48V 280Ah) — 14.3 kWh wall-mount LFP battery for indoor installations. 200A continuous output, 8,000 cycles at 80% DoD, 82.6 MWh lifetime throughput. UL 1973, UL 9540A.
- WallMount All-Weather (48V 280Ah) — 14.3 kWh outdoor-rated wall-mount battery with NEMA 4X enclosure, integrated self-heating, dual fire arrestors, and E-Stop rapid shutdown. 8,000 cycles at 80% DoD. Street price ~$3,150–$3,400.
- WallMount All-Weather (48V 314Ah) — 16 kWh outdoor wall-mount battery, the highest-capacity single-unit EG4 battery. 32 units parallel-able.
3. Recent Releases (2025–2026)
EG4 has been actively iterating on its battery platform through 2025 and 2026. Key recent developments include:
- LifePower4 V2 auto-addressing upgrade (2025) — EG4 added auto-addressing to the V2 platform, streamlining closed-loop communication setup between batteries and inverters. The upgrade is backwards-compatible and ships at no additional cost.
- 314Ah WallMount All-Weather (2025–2026) — EG4 expanded its wall-mount lineup with a 314Ah (16 kWh) variant, increasing single-unit capacity by 12% over the 280Ah model. Street price ~$3,399.
- Protocol 6 DIP switch — A new DIP-switch configuration system simplifies inverter matching, replacing older protocol selection methods.
- EG4 XR 60 (announced for late 2026) — EG4 has teased the XR 60, expected to be a higher-capacity or higher-power battery platform, with a launch event scheduled for September 2026.
4. Certifications & Listings
EG4 has invested significantly in North American safety certifications, which is a major differentiator versus uncertified imports:
- UL 1973 — Recognized Component for the LifePower4 V2 and LL-S batteries (stationary battery standard).
- UL 9540A — Fire-propagation test passed for the LifePower4 V2, LL-S, and WallMount series.
- UL 9540 — Listed as a complete energy storage system when paired with the EG4 18kPV-12LV inverter.
- UN 38.3 — Transport safety certification for lithium battery shipping.
- BABA compliance — EG4 products are available through BABA (Build America, Buy America) compliant supply channels for federally funded projects.
5. Warranty & Cycle Life
All EG4 batteries ship with a 10-year standard warranty. The warranty guarantees capacity retention and covers manufacturing defects and component failures. Key cycle-life figures:
- LifePower4 V2: 6,000+ cycles at 80% DoD
- LL-S: 7,000+ cycles at 80% DoD
- WallMount Indoor/All-Weather (280Ah): 8,000 cycles at 80% DoD, with 82.6 MWh lifetime throughput figure
- WallMount All-Weather (314Ah): 8,000+ cycles at 80% DoD
The warranty guarantees 70% capacity retention at end of term. EG4 offers advanced replacement for qualifying failures and backs its products with Texas-based technical support.
6. Popular Products at PES Supply
These are the EG4 models most frequently ordered through PES Supply, based on installer demand and project specifications:
| Model | Capacity | Voltage | Chemistry | Cycle Life | Price Range |
|---|---|---|---|---|---|
| EG4 LifePower4 V2 | 5.12 kWh (100Ah) | 51.2V | LFP | 6,000+ @ 80% DoD | $1,200–$1,470 |
| EG4 LL-S | 5.12 kWh (100Ah) | 51.2V | LFP | 7,000+ @ 80% DoD | $1,350–$1,500 |
| EG4 WallMount All-Weather | 14.3 kWh (280Ah) | 51.2V | LFP | 8,000 @ 80% DoD | $3,150–$3,400 |
| EG4 WallMount All-Weather (314Ah) | 16 kWh (314Ah) | 51.2V | LFP | 8,000+ @ 80% DoD | $3,399–$3,700 |
7. Technical Comparison
How EG4 stacks up against competing LFP battery brands on the metrics that matter to installers and integrators:
| Metric | EG4 LifePower4 V2 | Pylontech US5000 | SimpliPhi PHI 3.8 | Fortress eFlex MAX |
|---|---|---|---|---|
| Capacity | 5.12 kWh | 4.8 kWh | 3.8 kWh | 5.4 kWh |
| $/kWh (street) | ~$235–$285 | ~$260–$320 | ~$590–$660 | ~$350–$420 |
| Cycle life (80% DoD) | 6,000+ | 6,000 | 10,000+ | 6,000+ |
| BMS | 100A internal, RS485/CAN | Dual BMS, RS485/CAN | Integrated, CAT5 | Built-in, CAN/RS485 |
| UL 1973 | Yes (recognized) | Yes | Yes | Yes |
| Max parallel | 64 units (327.7 kWh) | 8 units (typical) | Scalable | Modular |
EG4's primary advantage is cost per kWh: at roughly $235–$285 per kWh, the LifePower4 V2 is among the cheapest UL-recognized LFP server-rack batteries on the market. The trade-off is that EG4's cycle-life rating (6,000+) is solid but not class-leading — SimpliPhi claims 10,000+ cycles, and the EG4 WallMount series reaches 8,000. For projects where upfront cost is the primary constraint, EG4 is hard to beat.
8. BMS & Monitoring
EG4 batteries feature a built-in battery management system (BMS) with the following capabilities:
- Cell balancing — Active cell balancing across the LFP cell array to maintain pack health.
- Over-current / over-voltage / over-temperature protection — Standard BMS protections with programmable cutoffs.
- Communication ports — RS485 and CAN bus ports support closed-loop communication with a wide range of inverters.
- Protocol 6 DIP switch — Simplifies inverter protocol matching without firmware changes.
- Auto-addressing (V2) — Automatic battery addressing for streamlined multi-battery installations.
Compatible inverters include EG4 (18kPV, 12kPV, 6000XP, 3000EHV), Sol-Ark, Schneider, Victron, Growatt, Megarevo, Luxpower, and Deye. The LL-S model adds an integrated LCD touchscreen for real-time battery status at the unit.
9. Installation Notes
- Stacking: Server-rack batteries are designed for standard 19-inch rack cabinets. EG4 offers 3-slot, 6-slot, and 12-slot pre-assembled rack kits with integrated bus bars. Up to 64 batteries can be paralleled for a maximum of 327.7 kWh.
- Communication protocols: RS485 and CAN bus. Use the Protocol 6 DIP switch to match inverter communication profiles. Auto-addressing on the V2 simplifies multi-unit setups.
- Temperature range: Charge 0°C to 50°C (32°F to 122°F); discharge -20°C to 60°C (-4°F to 140°F). The All-Weather WallMount includes integrated self-heating for cold-climate operation.
- Enclosure rating: Server-rack batteries are IP20 (indoor only). The WallMount All-Weather is NEMA 4X rated for outdoor installation.
- Venting: LFP chemistry does not require active venting. Dual on-board fire arrestors on the WallMount series provide fail-safe thermal protection. The E-Stop rapid shutdown function can disconnect all batteries and inverters with a single button.
- Terminals: Dual positive and dual negative terminals on the LifePower4 V2 for parallel charger/inverter connections.
10. Frequently Asked Questions
Can I mix EG4 LifePower4 V1 and V2 batteries in the same rack?
Technically yes — they share the same 48V platform and CAN communication protocol — but EG4 recommends using identical model numbers in a stacked system to ensure even balancing and consistent BMS behavior. The V2's auto-addressing feature is backwards-compatible with V1 units.
How many EG4 batteries can I parallel?
The LifePower4 V2 supports up to 64 units in parallel, yielding a maximum of 327.7 kWh. The WallMount All-Weather supports up to 32 units in parallel. Always verify your inverter's maximum charge/discharge current when sizing a battery bank.
Do EG4 batteries require an internet connection?
No. EG4 batteries operate autonomously via their internal BMS. Internet connectivity is only required if you want remote monitoring through a compatible inverter's app or platform. The LL-S model provides on-unit monitoring via its LCD touchscreen without any network connection.
Are EG4 batteries BABA compliant for federal projects?
Yes. EG4 products are available through Build America, Buy America (BABA) compliant supply channels, making them eligible for federally funded energy storage projects. Verify compliance documentation for your specific project requirements.
What is the difference between the LifePower4 V2 and the LL-S?
Both are 5.12 kWh (100Ah) server-rack LFP batteries. The LL-S adds an integrated LCD touchscreen for on-unit monitoring and carries a slightly higher cycle-life rating (7,000+ vs 6,000+ cycles at 80% DoD). The LifePower4 V2 is the value leader; the LL-S is the feature-rich option.
11. Shop EG4 at PES Supply
PES Supply is your source for EG4 Electronics batteries, inverters, and accessories. We stock EG4 server-rack and wall-mount batteries among our 50,000+ SKUs from 169 authorized brands, with delivery in 7–10 business days.
Explore our complete solar battery collection or contact our team for volume pricing on EG4 battery banks and rack kits.