Batteries

EcoFlow DELTA 2 Extra Battery (1.024 kWhr)

Model: ECOW-05
Specifications: 7

Ports51.2V, 1024W max (charges with the main unit using X-Stream and solar dual charging)
Battery ChemistryLithium Iron Phosphate (LiFePO4/LFP)
Capacity1024Wh
CompatibilityDELTA 2, DELTA Max
Cycle Life3,000 cycles to 80+% capacity
View all 7 specifications ↓

Overview

The EcoFlow DELTA 2 Smart Extra Battery adds 1024Wh of capacity to the EcoFlow DELTA 2 portable power station, effectively doubling its total capacity to 2048Wh. The extra battery can also be connected to a DELTA Max unit to expand its capacity.Features:Expandable capacity: By connec

Specifications

HARDWARE FEATURES
Ports	51.2V, 1024W max (charges with the main unit using X-Stream and solar dual charging)
General Specification
Battery Chemistry	Lithium Iron Phosphate (LiFePO4/LFP)
Capacity	1024Wh
Compatibility	DELTA 2, DELTA Max
Cycle Life	3,000 cycles to 80+% capacity
Weight	Approximately 9.5 kg (21 lbs)
Dimensions	40 x 21.1 x 28.1 cm (15.7 x 8.3 x 11.1 in)

How to read this datasheet

EcoFlow DELTA 2 Extra Battery (1.024 kWhr) is listed with 7 published specifications from Ecoflow, including ports of 51.2V, 1024W max (charges with the main unit using X-Stream and solar dual charging), battery chemistry of Lithium Iron Phosphate (LiFePO4/LFP), capacity of 1024Wh and compatibility of DELTA 2, DELTA Max. Those figures are what decide whether this unit fits your system, so read them against the equipment it will connect to before comparing price.

For a battery, the figures that matter most are cycle life at a stated depth of discharge, commonly 3,000–6,000 cycles for LiFePO4, round-trip efficiency, around 90–95% for lithium and 75–85% for lead-acid, communication protocol (CAN or RS485) for talking to the inverter and nominal capacity in ampere-hours (Ah) or kilowatt-hours (kWh). Storage is what turns a solar array from a daytime bill-reducer into a system that covers evening loads and rides through outages. It is normally the single most expensive component, so sizing it correctly matters more than with any other part.

Choosing a battery: the checks that matter

The checks below apply to any battery. Run them against the specification table above — most disappointing solar purchases are compatible-on-paper units that fail one of these in practice.

Check the continuous discharge rating against your inverter. A battery that stores plenty of energy but can only deliver 50 A cannot support a large inverter at full output.
Match voltage to the inverter, and confirm the battery appears on the inverter maker's supported list. Closed-loop communication lets the inverter respect the battery's real charge limits instead of guessing.
Read the warranty in full: lithium warranties are stated as a term plus either a cycle count or a total energy throughput, and whichever limit arrives first ends the cover.
Leave room to expand. Packs that parallel cleanly let you add capacity later; ones that do not force a full replacement.

Common mistakes

Ignoring the charge current limit and pairing a large array with a small bank, which trips protection and shortens life.
Mixing old and new batteries, or different chemistries, in one bank. The weakest unit drags the whole bank down and can be damaged by the others.
Sizing the bank for total daily consumption rather than after-dark consumption, which typically doubles the cost for no benefit.

Price and availability

No price is published for EcoFlow DELTA 2 Extra Battery (1.024 kWhr) at the moment. Pricing on solar equipment moves with supply and exchange rates, and some distributors quote only on request — the specifications above are still directly comparable against alternatives that do list a price.

SolarBazaar compares equipment rather than selling it. Shortlist here on specification and price, then buy from an authorised distributor or installer in your country: warranty cover on solar hardware is normally honoured through the channel you bought from, so confirm who supports Ecoflow locally before ordering.

EcoFlow DELTA 2 Extra Battery (1.024 kWhr) — frequently asked questions

What are the specifications of EcoFlow DELTA 2 Extra Battery (1.024 kWhr)?

We hold 7 published specifications for this battery, including ports 51.2V, 1024W max (charges with the main unit using X-Stream and solar dual charging), battery chemistry Lithium Iron Phosphate (LiFePO4/LFP), capacity 1024Wh, compatibility DELTA 2, DELTA Max and cycle life 3,000 cycles to 80+% capacity. The full table is on this page, listed under model ECOW-05.

Who makes EcoFlow DELTA 2 Extra Battery (1.024 kWhr)?

EcoFlow DELTA 2 Extra Battery (1.024 kWhr) is a Ecoflow product, listed under batteries with model reference ECOW-05. The Ecoflow brand page lists the rest of its range so you can compare across the catalogue.

Is EcoFlow DELTA 2 Extra Battery (1.024 kWhr) right for my system?

That depends on what it has to connect to. For a battery, check system voltage: 12 V, 24 V and 48 V for low-voltage packs, or a high-voltage stack, continuous charge and discharge current, which limits how much power you can draw from the pack and cycle life at a stated depth of discharge, commonly 3,000–6,000 cycles for LiFePO4 against the rest of your equipment before price enters the decision. Match voltage to the inverter, and confirm the battery appears on the inverter maker's supported list. Closed-loop communication lets the inverter respect the battery's real charge limits instead of guessing.

Where can I buy EcoFlow DELTA 2 Extra Battery (1.024 kWhr)?

SolarBazaar lists and compares equipment rather than selling it. Use the specifications and price here to shortlist, then buy through an authorised distributor or installer — buying in-channel is what keeps the manufacturer's warranty valid.

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