Enphase IQ Battery 5P LFP - Detailed Buyer Guide 2026
5 kWh LFP home battery with 3.84 kW output and NEMA 4X rating. AC-coupled for any solar system - no inverter replacement required.
from $6,500
In stock
4.5 (389 reviews)
Check priceSpecifications
- Usable Capacity
- 5.0 kWh
- Continuous Power
- 3.84 kW
- Peak Power
- 7.68 kW (10 s)
- Chemistry
- LFP (Lithium Iron Phosphate)
- Round-Trip Efficiency
- 89%
- Warranty
- 10 years / 4,000 cycles (80% capacity)
- Protection Rating
- NEMA 4X (IP66 equivalent)
- Weight
- 84.4 kg
- Expandable
- Up to 4 units per system
Enphase IQ Battery 5P - Overview
The Enphase IQ Battery 5P is a 5 kWh LFP (Lithium Iron Phosphate) AC-coupled battery designed for residential self-consumption optimisation and backup power. LFP chemistry offers intrinsically safer chemistry (no thermal runaway risk) and longer cycle life than NMC alternatives. The IQ Battery 5P connects to the AC bus, meaning it can be added to any existing solar system - including SolarEdge, Fronius, SMA, or Huawei installs - without replacing the solar inverter.
AC Coupling - No Inverter Replacement Required
Because the IQ Battery 5P connects to the AC side of the electrical system, it works with any existing solar inverter. This makes it the best retrofit option for homeowners who want to add storage to an already-installed solar system. The trade-off versus DC-coupled systems (like Powerwall 3 or SolarEdge + StorEdge) is a modest efficiency penalty: each DC-to-AC-to-DC conversion loses approximately 3 - 5%, reducing effective round-trip efficiency to ~89%.
LFP Chemistry - Safety and Longevity
LFP batteries do not contain cobalt or nickel, reducing supply chain risk and thermal runaway hazard compared to NMC chemistries. The IQ Battery 5P is warranted to retain 80% capacity after 4,000 cycles or 10 years - roughly 11 years of daily cycling. IEC 62619 and UL 9540 certified.
Enphase Ensemble Ecosystem
The IQ Battery 5P integrates fully with Enphase's Ensemble energy management system when paired with an IQ System Controller 2. The Controller manages solar production, battery state-of-charge, and grid tariff optimisation, and enables whole-home backup during grid outages (transfer time <2 seconds with IQ System Controller 2).
Key Advantages
- AC-coupled retrofit - adds storage to any existing solar system without inverter replacement
- LFP chemistry - safer and longer-lived than NMC; no cobalt
- NEMA 4X weatherproof - suitable for outdoor installation in all climates
- Modular stacking - up to 4 × 5 kWh = 20 kWh per system
- Enphase Enlighten integration - battery state, charge/discharge cycles, and grid interaction visible in the same app as solar panels
Rating based on 389 installer and homeowner reviews.
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