Inverex Power Wall INV-LV-IP21 11.8 (11.8 kWh LiFePO4)

The Inverex Power Wall INV-LV-IP21 11.8 is an 11.8 kWh (51.2V 230Ah) LiFePO4 wall-mount battery — the mid-size unit of Inverex's current lithium line, aimed at homes that want whole-evening backup from a single box paired with a Nitrox hybrid. As of 2 August 2026 it sells for Rs 578,000-600,000 across three independent Pakistani retailers.

Specifications

All figures from the official Inverex INV-LV-IP21 datasheet unless noted.

*The datasheet contradicts itself on height: 559 mm in the main parameter table, 583 mm in its own comparison table. Measure before building a cabinet around it.

Honest assessment

Pros. 230A continuous both ways (1C) means this single pack can charge from and discharge into a 12 kW hybrid without throttling — a genuine advantage over paralleling small packs with lower combined C-rates on one comms bus. The published datasheet is complete and certified (UN38.3, CE, CB), CAN2.0 and RS485 are standard, and per nameplate kWh it is the cheapest current Inverex lithium: Rs 49,000-50,800/kWh versus Rs 54,200-55,700/kWh for the 5.12 kWh unit (2 August 2026 prices).

Cons. The warranty arithmetic is the story. The printed throughput figure is 18 MWh — barely more than the 5.12 kWh unit's 16 MWh despite 2.3 times the capacity. At 90% DoD that is roughly 1,700 full cycles, against a 6,000-cycle headline; the warranty covers under a third of the rated cycle life, by our math. Two 5.1s cost less (Rs 555,000-570,000), carry 32 MWh of combined throughput, and give 9.2 kWh usable versus 10.6. Note also the narrower charge window — 0°C minimum versus -10°C on the 5.1 (rarely relevant in Pakistan outside the northern highlands) — the undisclosed cell OEM, and an 84 kg box that needs two people and a serious wall.

Who should buy. Nitrox 8-12 kW owners who want maximum single-box current and minimum wiring, and who read warranty letters. Buyers optimizing warranted-kWh per rupee should buy two 5.1s instead.

Pakistan reality check

BMS pairing. Same ecosystem logic as the rest of the line: pre-tuned for Inverex's own Nitrox hybrids over CAN, with no published compatibility list for anyone else's inverter. For a non-Inverex hybrid, demand the working protocol setting in writing — the failure patterns are documented in our compatibility guide.

Heat is the silent cost. The 6,000-cycle rating is a 25°C laboratory number. In a Punjab summer utility room the pack will live at 35-45°C for months; LiFePO4 calendar and cycle aging both accelerate with temperature (the mechanics are here). An 84 kg wall unit is also harder to relocate later than a stack of small packs — pick the coolest indoor wall the first time.

IP21 means indoors. Drip-proof, not weather-proof. Verandas, external walls and stairwells open to rain-splash are out.

Claim paperwork. The warranty defers to the "Inverex Warranty Letter" and the 18 MWh throughput figure is printed on the official spec sheet — that is the number a claims assessor can hold you to, not the cycle headline. Invoice, warranty letter, dealer registration: all three, at purchase.

Price context vs rivals (August 2026)

Large-format LV packs, live listings checked 2 August 2026:

Pylontech's Fidus Plus 16 kWh undercuts both big Inverex packs per kWh — the ecosystem premium persists at every size. Smaller needs are better served by the INV-LV-IP21 5.1; the full brand picture is on the Inverex batteries hub.