Batteries

EB3840 | Expansion Battery | 300Ah

A$ 2,849AUD · price may vary

Model: EB3840
Specifications: 0

Overview

Introducing the EB3840 Expansion Battery. Designed for home backup, up to two of the EB3840 (300Ah each) connected with the PS3600 PRO, you can seamlessly increase the power storage capacity of your power station up to 11,520Wh (900Ah), which ensures complete off-grid living is attainable.

As standard in the iTechworld Power Station range, the EB3840 Expansion Battery features the safest lithium technologies available including over-charge, over-discharge, over-current, over-load, short-circuit, and over-temperature protection.

PACKAGE CONTENTS

1 x EB3840 Expansion Battery

1 x Car Charger

1 x Parallel Cable

1 x 50A Anderson to XT60 Adapter

1 x Cable Storage Bag

1 x User Guide

Support

The EB3840 expansion battery includes an exclusive 2 year warranty from date of purchase. Keep out of direct sunlight and away from moisture and water.

How to read this datasheet

Detailed specifications for EB3840 | Expansion Battery | 300Ah have not been published yet. iTechworld lists this battery in the Batteries, and we add fields as the manufacturer releases them — in the meantime, ask your distributor for the datasheet before ordering.

For a battery, the figures that matter most are nominal capacity in ampere-hours (Ah) or kilowatt-hours (kWh), usable capacity after depth of discharge — LiFePO4 typically allows 80–100%, lead-acid closer to 50%, system voltage: 12 V, 24 V and 48 V for low-voltage packs, or a high-voltage stack and continuous charge and discharge current, which limits how much power you can draw from the pack. 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.

What to check before ordering

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.

Size from your evening consumption. Add up what actually runs after sunset for the hours you want covered, then divide by the usable capacity per unit — that number, not the array size, sets how many batteries you need.
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.

Common mistakes

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.
Installing lithium packs in an unventilated, hot enclosure. Sustained high temperature is the fastest way to lose cycle life.

Price and availability in Australia

EB3840 | Expansion Battery | 300Ah is listed at A$ 2,849 (AUD) for Australia. Solar pricing moves with supply, import duties and exchange rates, and distributors set their own margins, so treat this as a comparison reference and confirm the current figure before you order.

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

EB3840 | Expansion Battery | 300Ah — frequently asked questions

How much does EB3840 | Expansion Battery | 300Ah cost?

EB3840 | Expansion Battery | 300Ah is listed at A$ 2,849 (AUD) for Australia. The figure is indicative — solar prices move with supply, duties and exchange rates, and each distributor sets its own margin — so confirm the current price with a supplier before ordering.

Who makes EB3840 | Expansion Battery | 300Ah?

EB3840 | Expansion Battery | 300Ah is a iTechworld product, listed under batteries with model reference EB3840. The iTechworld brand page lists the rest of its range so you can compare across the catalogue.

Is EB3840 | Expansion Battery | 300Ah right for my system?

That depends on what it has to connect to. For a battery, check usable capacity after depth of discharge — LiFePO4 typically allows 80–100%, lead-acid closer to 50%, system voltage: 12 V, 24 V and 48 V for low-voltage packs, or a high-voltage stack and continuous charge and discharge current, which limits how much power you can draw from the pack against the rest of your equipment before price enters the decision. 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.

Where can I buy EB3840 | Expansion Battery | 300Ah in Australia?

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 in Australia — buying in-channel is what keeps the manufacturer's warranty valid.

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