Sike Power 12V 300Ah LiFePO4 lithium deep cycle battery

12V And 24V Lithium Batteries

12V 300Ah LiFePO4 Deep Cycle Battery

Name: 12V 300Ah LiFePO4 Deep Cycle Battery
Brand: Sike Power

300Ah at 12V with a 200A BMS and Bluetooth monitoring, in the same 522 x 268 x 218 mm case as the 400Ah pack but 10 kg lighter.

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Product Overview

300Ah at 12V with a 200A BMS and Bluetooth monitoring, in the same 522 x 268 x 218 mm case as the 400Ah pack but 10 kg lighter. It is the size most often specified for an RV, a boat or a trolling motor setup where 200Ah runs short by the second night but 400Ah is more battery than the budget or the locker allows. Published 95-100% depth of discharge means almost the whole 300Ah is genuinely usable.

12V 300Ah lithium battery shown with terminals and carry handles

Key benefits

Why Buyers Choose This Pack

Three Nights Instead Of Two

The step from 200Ah to 300Ah is usually what turns a weekend setup into one that works for a week.

200A BMS

The same current headroom as the 400Ah pack, so inverter and trolling motor loads are not the limiting factor.

95-100% Usable Capacity

A published DOD figure, which is what makes a direct comparison against a lead-acid rating meaningful.

28 kg In An IP65 Case

Light enough for one person to handle carefully, sealed enough for a locker or a bilge-adjacent mount.

Application scenarios

Where It Is Used

RV and motorhome house banks for extended trips
Trolling motor and marine house loads
Off-grid cabins and small solar systems
Mobile workshops and service vehicles
Event and catering power
Backup for a small off-grid installation

Who it is for

The Buyers This Pack Suits

RV Owners Upgrading From AGM

Where the existing bank cannot get through a long weekend without the generator.

Marine Electricians

Building a house bank with a trolling motor or a substantial inverter load.

Solar Installers On 12V Systems

Sizing autonomy for a cabin or a monitoring installation.

Problems it solves

What It Fixes

Running Out On The Second Night

200Ah of lithium is genuinely useful; 300Ah is what removes the daily anxiety about the fridge.

Weight In A Small Vehicle

28 kg for 300Ah usable against a lead-acid bank that would weigh three times as much for the same usable energy.

Not Knowing The State Of Charge

Bluetooth monitoring replaces guesswork from a nearly flat voltage curve.

Specifications

Published Figures For This Pack

Every value below comes from our own product specification. Where a figure is not published we leave it out rather than estimating it.

12V 300Ah LiFePO4 Deep Cycle Battery specification
Nominal voltage	12.8 V
Capacity	300 Ah consistent output
Dimensions	522 x 268 x 218 mm
Weight	28 kg
BMS current	200 A smart BMS
Cycle life	3000+ deep discharge cycles
Depth of discharge	95-100% usable
Ingress protection	IP65
Monitoring	Bluetooth real-time monitoring
Certificates	MSDS, UN38.3, CE, ROHS, UL
Cells and BMS	Grade A LiFePO4 cells, smart BMS

Packing and documents

How It Ships And What Comes With It

Packing And Shipping

Packing follows UN38.3 requirements for lithium battery transport, and the carton and pallet arrangement is confirmed with the quotation for your quantity and destination. We do not publish a fixed carton specification here because it changes with order size and freight mode.

Documentation

UN38.3 and the MSDS travel with every lithium shipment, and the certificates listed in the specification table above are supplied for the model you order. Tell us the destination market at the quotation stage so the document set is planned rather than chased after the goods are built. Where a certificate we do not hold is required, we will say so rather than promise it.

Manufacturing

This pack is built at Shenzhen Sike Power Technology Co., Ltd. in Da Peng New District, Shenzhen, with cell grading, assembly, BMS integration, aging test and final inspection carried out in house. Only brand-new grade A LiFePO4 cells and a top-brand smart BMS go into it.

Download the catalogue and datasheets for the specification in PDF form.

Installation guide

Getting It Right First Time

Step 1

Check the locker against 522 x 268 x 218 mm - the same case as the 400Ah pack.

Step 2

Match inverter surge to the 200A BMS rating before ordering.

Step 3

Use a DC-DC charger for alternator charging and a LiFePO4 profile on solar and shore chargers.

Step 4

Keep the pack out of freezing conditions if it will be charged there, or specify heating.

Step 5

Use the Bluetooth monitor at commissioning to verify the charger's actual behaviour.

Comparison

How It Compares In Our Range

Within the 12V deep cycle range, capacity and case size move together - fit first, capacity second.

Alternatives to the 12V 300Ah LiFePO4 Deep Cycle Battery
12V 150Ah	14.2 kg, 330 x 172 x 215 mm
12V 200Ah	18.4 kg, 502 x 186 x 240 mm
12V 300Ah	28 kg, 522 x 268 x 218 mm
12V 400Ah	38 kg, same case, maximum 12V capacity

FAQ

12V 300Ah LiFePO4 Deep Cycle Battery Questions

How much of the 300Ah can I use?

The published depth of discharge is 95-100%, so nearly all of it. In practice leaving a small reserve protects cycle life without materially changing the usable energy.

Will it run a 2000W inverter?

At 12V that is about 170A before losses, inside the 200A BMS rating for continuous draw. Check the inverter's surge figure as well, because that is what trips a BMS.

Can I parallel two of them?

Yes, with matched packs at a similar state of charge when connected. Send the bank size you want and we will confirm the arrangement.

Does it fit where my lead-acid batteries were?

Only if the locker takes 522 x 268 x 218 mm - this is a lithium-only format with no lead-acid equivalent. Measure before ordering.

How long does it take to charge?

At 0.5C to 1C acceptance, one to two hours with a charger capable of that current. Most solar systems will be limited by the array rather than the battery.

Which certificates apply?

MSDS, UN38.3, CE, ROHS and UL.