RB300

12V 300Ah
Deep Cycle Lithium Battery
Group 8D

RB300

12V 300Ah
Deep Cycle Lithium Battery
Group 8D

Our RB300 is a lithium iron phosphate battery that’s ready to replace your heavy lead-acid battery bank in your sailboat, RV, or solar energy system. It’s only 76 lbs. for a true 300 Amp Hour lithium battery that provides 100% of its rated capacity.

$2,499.95

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ENGINEERED IN THE USA

United States Of America White 230216 103954

US-BASED SUPPORT

Warranty White 230216 103954

10 YEAR WARRANTY

Features

Lightweight

RELiON lithium batteries provide more power than lead-acid batteries and are typically half the weight. Boosting both performance and agility on the water.

Temperature Tolerant

Lithium batteries can handle a wide variety of conditions and are even 2.5x more efficient at low temperatures than lead-acid while being able to safely operate up to 149°F (65°C).

Fast Charging

RELiON lithium batteries charge much faster than traditional lead-acid batteries, and they’re packed with more usable energy and up to 10 times longer life so you’re always ready to go!

Long Life

RELiON lithium batteries provide up to 10 times longer life than lead-acid batteries, and they still provide 80% of the rated capacity after 3,500 cycles.

Maintenance Free

RELiON lithium batteries are maintenance-free – no watering, no corrosion. Low self-discharge means the batteries don’t lose capacity when they’re idle, assuring that you have the energy you need, every time you need it.

Constant Power

Full power available throughout discharge. Voltage does not drop like lead-acid.

Partial State of Charge Tolerant

Partial state of charge, known as PSOC, which is a killer of lead-acid batteries, does not affect performance or battery life of a lithium battery. Sometimes batteries don’t get fully charged, or they regularly operate in a partial state of charge. Either way, you can count on RELiON lithium batteries living a long and productive life.

More Usable Capacity

Lead-acid batteries are typically sized up to two times your energy needs to account for extended periods without sun and less usable energy with higher rates of discharge. Plus, you are typically cautioned to limit your use to 50% of the rated capacity, as using more can significantly reduce performance. Lithium batteries provide 100% of their rated capacity, regardless of the rate of discharge. And, you can use it all and still get substantially longer cycle life.

Specifications

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Electrical Specifications

Nominal Voltage 12.8 V
Nominal Capacity 300 Ah
Capacity @ 25 A 720 min
Resistance ≤30 mΩ @ 50% SOC
Efficiency 99%
Self Discharge <3% per Month
Maximum Batteries Connected in Series 6

Mechanical Specifications

Dimensions (L x W x H) 20.6 x 10.5 x 8.7” (522 x 267 x 220 mm)
Weight 75.8 lbs (34.36 kg)
Terminal Type M8 x 1.25 x 2mm
Terminal Torque 80 - 100 in-lbs (9 - 11 N-m)
Case Material ABS & Polycarbonate blend (UL94-V0 flame rating)
Enclosure Protection (Waterproof Rating) IP67
Cell Type - Chemistry Cylindrical - LiFePO4

Discharge Specifications

Maximum Continuous Discharge Current 100 A
Peak Discharge Current 200 A (7.5 s ±2.5 s)
Discharge Over-Current Protection 280 A ±50 A (9 ±4 ms)
Recommended Low Voltage Disconnect 11.0 V
Discharge Under-Voltage Protection 8.0 V (2.0 ±0.08 vpc) (140 ±60 ms)
Reconnect Voltage 9.2 V (2.3 ±0.1 vpc)
Short Circuit Protection Response Time 200-600 µs

Charge Specifications

Recommended Charge Current 15 A - 50 A
Maximum Continuous Charge Current 100 A
Maximum Charge Current 14 to 32 ºF (-10 to 0 ºC) ≤0.1 C (10 A)
Maximum Charge Current -4 to 14 ºF (-20 to -10 ºC) ≤0.05 C (5 A)
Recommended Charge Voltage 14.2 V - 14.6 V
BMS Charge Voltage Cut-Off 15.6 V (3.9 ±0.025 vpc) (1.1 ±0.4 s)
Reconnect Voltage 15.2 V (3.8 ±0.05 vpc)
Balancing Voltage 14.4 V (3.6 ±0.025 vpc)

Temperature Specifications

Discharge Temperature -4 to 140 ºF (-20 to 60 ºC)
Charge Temperature* -4 to 113 ºF (-20 to 45 ºC)
Recommended Storage Temperature 23 to 95 ºF (-5 to 35 ºC)
BMS High Temperature Cut-Off 176 ºF (80 ºC)
Reconnect Temperature 122 ºF (50 ºC)

Compliance Specifications

Certifications UN38.3, UKCA & CE (battery)
UL1642 (cells) (File# MH64523)
IEC62133 (cells)
Shipping Classification UN 3480, CLASS 9

Performance Characteristics

Charge Voltage Char Chart 12 V graph
Charge Voltage Soc Chart 12 V graph
Discharge Voltage At Various Rates 12 V graph
Discharge Voltage Chart 12 V graph
Life Vs Lead Acid Chart graph
Cycle Life Vs Depth Discharge Chart graph

Reviews

Walid

how many years warranty?

Pete S.

Arrived as promised. Very impressive packaging. We are now installing them in my sailboat. They replace four 13-year-old AGM batteries for all "House Loads," everything, including winches, except engine start.

Scott C.

Super awesome product support! Super fast and accurate shipping! Batteries work amazing! I really like the long lasting power that I have now. I boon-dock mainly and having battery power is crucial. Thanks for a superior product and service!

Pete S.

Jun 15th, 2021

Arrived as promised. Very impressive packaging. We are now installing them in my sailboat. They replace four 13-year-old AGM batteries for all "House Loads," everything, including winches, except engine start.

Scott C.

Oct 29th, 2020

Super awesome product support! Super fast and accurate shipping! Batteries work amazing! I really like the long lasting power that I have now. I boon-dock mainly and having battery power is crucial. Thanks for a superior product and service!

The RB300 Is Great For Powering

Anchor V2 230216 114031

Marine

Recreational 230216 114025

RV

Solar 230216 114023

Renewable Energy

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