Battery-Cables-&-Accessories > Batteries > RELiON-Lithium-Batteries
RELiON Legacy Series Lithium Batteries: Drop-In Replacement for AGM, GEL, and Lead-Acid Batteries
Upgrade to RELiON Legacy Series: High-Performance Lithium Batteries for Versatile Applications
RELiON Legacy Series RB36V40: High-Capacity 36V Lithium Battery for Marine, RV, and Solar Applications
RELiON Legacy Series 48V Lithium Batteries: High-Capacity Power for Solar Energy Systems
Mastervolt BattMan Battery Monitors: Accurate, Affordable Power Management for Marine, RV, and Solar Applications
RELiON® Legacy Series - 12V
RELiON Legacy Series Lithium Batteries: Drop-In Replacement for AGM, GEL, and Lead-Acid Batteries
The RELiON Legacy Series is the perfect drop-in upgrade for Group 24, 27, 31, and 8D AGM, GEL, or lead-acid batteries, offering the enhanced benefits of lithium iron phosphate (LiFePO4) chemistry. These batteries are safe, stable, generate minimal heat, and provide ultra-fast charging, high efficiency, longer life cycles, and zero maintenance—making them a superior investment over traditional lead-acid batteries.
Designed for a wide range of applications, including RVs, marine, electrical backup, and solar systems, the Legacy Series offers flexibility and compatibility. Parallel connections can be made with up to 12 units, making it suitable for larger systems. These batteries feature a nominal voltage of 12.8V and are rated for use in temperatures ranging from -4°F to 140°F. With a 10-year warranty, including a 3-year free replacement or repair period, RELiON Legacy Series batteries provide long-term reliability and performance.
Learn more at our blog post - RELiON Legacy Series – Deep Cycle Lithium Batteries. Looking to upgrade your RV? Check out this video on the best options for your RV.
The RB300 is currently unavailable. We apologize for the inconvenience.
- Rated up to 12V. Nominal Voltage: 12.8V
- See spec sheets for series capability. Parallel connections can be made up to 12 units.
- 10-year Warranty – 3 year Free Replacement or Repair Period
- Rated for UN38.3, UKCA & CE (battery),UL1642 (cells), (File# MH64523), IEC62133 (cells), Shipping Classification UN 3480, CLASS 9
- Recommended Charge Voltage: 14.2 V - 14.6 V (Marine, RV, Solar and other 12V applications)
- Discharge Temperature: -4 to 140 ºF (-20 to 60 ºC)
- Charge Temperature: -4 to 113 ºF (-20 to 45 ºC)
- Storage Temperature: 23 to 95 ºF (-5 to 35 ºC)
- Recommended charger is 944012
- *All RELiON Hazmat items are not eligible for return to Del City. Please review our return policy.
- *Can not be shipped outside the US contiguous states
- *Potential 1-2 week shipping delay for all hazmat items
| 12V | 24V | 36V | 48V | DIGITAL MONITOR | |||||||||||||||||
| Item | Description | Price |
Qty in
Package |
Add to Cart |
| RB5 | RELiON RB5, LIFEPO4 Legacy Lithium Battery 12V, F2 Flag Terminal, Not Series Capable, 12.8V, 5 Amp Hour, HAZMAT
|
69.95 | 1 EA | |
| RB12 | RELiON RB12, LIFEPO4 Legacy Lithium Battery 12V, F2 Flag Terminal, Not Series Capable, 12.8V, 12 Amp Hour, HAZMAT
|
109.95 | 1 EA | |
| RB20 | RELiON RB20, LIFEPO4 Legacy Lithium Battery 3SC 12V, Series Capable to 36V, 12.8V, 20 Amp Hour, HAZMAT
|
189.95 | 1 EA | |
| RB20-X | RELiON RB20-X, High Continuous and High Peak LIFEPO4 Legacy Lithium Battery 3SC 12V, Series Capable up to 36V, 12.8V, 20 Amp Hour, HAZMAT
|
199.95 | 1 EA | |
| RB35 | RELiON RB35, LIFEPO4 Legacy Lithium Battery U1 3SC 12V, Series Capable up to 36V, 12.8V, 35 Amp Hour, HAZMAT
|
329.95 | 1 EA | |
| RB35-X | RELiON RB35-X, High Continuous and High Peak LIFEPO4 Legacy Lithium Battery U1 12V, Not Series Capable, 12.8V, 35 Amp Hour, HAZMAT
|
359.95 | 1 EA | |
| RB52 | RELiON RB52, LIFEPO4 Legacy Lithium Battery 4SC 26G 12V, Series Capable up to 48V, 12.8V, 52 Amp Hour, HAZMAT
|
469.95 | 1 EA | |
| RB60 | RELiON RB60, LIFEPO4 Legacy Lithium Battery 24 4SC 12V, Series Capable up to 48V, 12.8V, 60 Amp Hour, HAZMAT
|
569.95 | 1 EA | |
| RB75 | RELiON RB75, LIFEPO4 Legacy Lithium Battery 24 4SC 12V, Series Capable up to 48V, 12.8V, 75 Amp Hour, HAZMAT
|
699.95 | 1 EA | |
| RB80 | RELiON RB80, LIFEPO4 Legacy Lithium Battery 27 4SC 12V, Series Capable up to 48V, 12.8V, 80 Amp Hour, HAZMAT
|
749.95 | 1 EA | |
| RB100 | RELiON RB100, LIFEPO4 Legacy Lithium Battery 31 4SC 12V, Series Capable up to 48V, 12.8V, 100 Amp Hour, HAZMAT
|
899.95 | 1 EA | |
| RB170 | RELiON RB170, LIFEPO4 Legacy Lithium Battery 4SC 12V, Series Capable up to 48V, 12.8V, 170 Amp Hour, HAZMAT
|
1,529.95 | 1 EA | |
| RB200 | RELiON RB200, LIFEPO4 Legacy Lithium Battery 8D 6SC 12V, Series Capable up to 48V, 12.8V, 200 Amp Hour, HAZMAT
|
1,749.95 | 1 EA | |
| RB300 | RELiON RB300, LIFEPO4 Legacy Lithium Battery 8D 4SC 12V, Series Capable up to 48V, 12.8V, 300 Amp Hour, HAZMAT
|
2,499.95 | 1 EA |
RELiON® Legacy Series - 24V
Upgrade to RELiON Legacy Series: High-Performance Lithium Batteries for Versatile Applications
The RELiON Legacy Series is the perfect drop-in replacement for various battery sizes, including Group U1, 24, 31, and 8D AGM, GEL, or lead-acid batteries. Built with advanced LiFePO4 (Lithium Iron Phosphate) cell chemistry, these batteries offer exceptional safety and stability while producing minimal heat during operation. With ultra-fast charging capabilities, impressive efficiency, a longer life cycle, and zero maintenance requirements, the Legacy Series delivers a superior return on investment compared to traditional lead-acid batteries.
Versatility is a hallmark of the RELiON Legacy Series, making it an ideal choice for a wide range of applications, including RVs, marine systems, electrical backup, and solar energy setups. Designed for reliability and performance, these lithium batteries allow users to upgrade their energy systems effortlessly. Discover more about their benefits on the Del City blog, and for RV-specific upgrades, explore this comprehensive video guide. Elevate your power solutions with the RELiON Legacy Series and experience the unmatched advantages of lithium technology.
Learn more at our blog post - RELiON Legacy Series – Deep Cycle Lithium Batteries. Looking to upgrade your RV? Check out this video on the best options for your RV.
- Rated up to 24V. Nominal Voltage: 25.6V
- Parallel connections made up to 12 units
- Storage Temperature: 23 to 95 ºF (-5 to 35 ºC)
- 10-year Warranty – 3 year Free Replacement or Repair Period
- Rated for UN38.3 & CE (battery), UL1642 (cells), (File# MH64523), IEC62133 (cells), IEC62133-2 (battery), Shipping Classification UN 3480, CLASS 9
- Recommended Charge Voltage: 28.4 V - 29.2 V (Marine, Electrical and Solar applications)
- Discharge Temperature: -4 to 140 ºF (-20 to 60 ºC)
- Charge Temperature: -4 to 113 ºF (-20 to 45 ºC)
- Recommended charger is 963170
- *Can not be shipped outside the US contiguous states
- *All RELiON Hazmat items are not eligible for return to Del City. Please review our return policy.
- *Potential 1-2 week shipping delay for all hazmat items
| 12V | 24V | 36V | 48V | DIGITAL MONITOR | |||||||||||||||||
| Item | Description | Price |
Qty in
Package |
Add to Cart |
| RB24V20 | RELiON RB24V20, LIFEPO4 Legacy Lithium Battery U1 24V, Not Series Capable, 25.6V, 20 Amp Hour, HAZMAT
|
379.95 | 1 EA | |
| RB24V40 | RELiON RB24V40, LIFEPO4 Legacy Lithium Battery 24 24V, Not Series Capable, 25.6V, 40 Amp Hour, HAZMAT
|
749.95 | 1 EA | |
| RB24V52 | RELiON RB24V52, LIFEPO4 Legacy Lithium Battery 31 24V, Not Series Capable, 25.6V, 52 Amp Hour, HAZMAT
|
929.95 | 1 EA | |
| RB24V100 | RELiON RB24V100, LIFEPO4 Legacy Lithium Battery 8D 24V, Not Series Capable, 25.6V, 100 Amp Hour, HAZMAT
|
1,749.95 | 1 EA | |
| RB24V200 | RELiON RB24V200, LIFEPO4 Legacy Lithium Battery 24V, Not Series Capable, 25.6V, 200 Amp Hour, HAZMAT
|
3,495.95 | 1 EA |
RELiON® Legacy Series - 36V
RELiON Legacy Series RB36V40: High-Capacity 36V Lithium Battery for Marine, RV, and Solar Applications
The RELiON® Legacy Series RB36V40 is a game-changing drop-in upgrade, offering a powerful, compact solution for marine, RV, electrical backup, floor machines, and solar energy applications. Specifically designed for marine use, it boasts an IP67 waterproof rating, providing superior protection against water and harsh environments. This 36V battery eliminates the need for wiring three 12V batteries in series, offering a simplified setup with a smaller Group 31 case size footprint. By running fewer batteries while increasing capacity, users can enjoy longer run times and enhanced efficiency.
Manufactured with advanced LiFePO4 (Lithium Iron Phosphate) cell chemistry, the RB36V40 prioritizes safety, stability, and minimal heat generation. Key performance advantages include ultra-fast charging, high energy efficiency, a longer life cycle, and zero maintenance, making it a more cost-effective and eco-friendly choice than traditional lead-acid batteries. The RB36V40 operates within a wide temperature range, from -4°F to 140°F for discharging and up to 113°F for charging, ensuring reliable performance in diverse conditions. With a recommended charge voltage of 42.6V to 43.8V, this battery supports marine, RV, and solar applications with optimal energy flow. It also offers 20% more capacity compared to traditional 3x12V 100Ah series setups.
Certified to meet UN38.3, CE, UKCA, UL1642, and IEC62133 standards, the RELiON RB36V40 upholds the highest levels of safety and quality. Backed by a robust 10-year warranty with a 3-year free replacement or repair period, users are assured of long-term reliability. Note that hazmat items, including this battery, may have a 1-2 week shipping delay. The RELiON Legacy Series RB36V40 provides unmatched power, flexibility, and convenience, making it a top choice for marine trolling motors, solar energy systems, RVs, and beyond.
Learn more at our blog post - RELiON Legacy Series – Deep Cycle Lithium Batteries. Learn more about how you can fish all day with long lasting 36V batteries in this video about the New RB36V40.
- Rated up to 36V. Nominal Voltage: 38.4V
- 3 @ 36V 40Ah (120 total Ah) in Parallel vs 3 @ 12V100Ah in Series = 20% More Capacity
- Recommended Charge Voltage: 42.6V-43.8V (Marine, RV, Electrical and Solar applications)
- Discharge Temperature: -4 to 140 ºF (-20 to 60 ºC)
- Charge Temperature: -4 to 113 ºF (-20 to 45 ºC)
- 10-year Warranty – 3 Year Free Replacement or Repair Period
- Rated for UN38.3 & CE & UKCA (battery), UL1642 (cells), IEC62133 (cells), Shipping Classification UN 3480, CLASS 9
- Data Sheet: RB36V40
- *Can not be shipped outside the US contiguous states
- *All RELiON Hazmat items are not eligible for return to Del City. Please review our return policy.
- *Potential 1-2 week shipping delay for all hazmat items
| 12V | 24V | 36V | 48V | DIGITAL MONITOR | |||||||||||||||||
| Item | Description | Price |
Qty in
Package |
Add to Cart |
| RB36V40 | RELiON RB36V40, LIFEPO4 Legacy Lithium Battery 36V, Not Series Capable, 38.4V, 40 Amp Hour, HAZMAT
|
1,089.95 | 1 EA |
RELiON® Legacy Series - 48V
RELiON Legacy Series 48V Lithium Batteries: High-Capacity Power for Solar Energy Systems
The RELiON Legacy Series 48V lithium batteries deliver unmatched power, efficiency, and long-term reliability, making them the ideal upgrade for modern energy storage systems. Built with advanced LiFePO4 (Lithium Iron Phosphate) cell chemistry, these batteries provide superior safety, stability, and minimal heat generation, even in high-demand applications. Their ultra-fast charging, high energy efficiency, longer life cycle, and zero-maintenance design offer significant cost savings and a higher return on investment compared to traditional lead-acid batteries.
With a nominal voltage of 51.2V and a recommended charge voltage of 56.0V to 58.4V, these batteries are perfectly suited for solar energy storage. Capable of parallel connections with up to 12 units, they allow users to increase energy capacity with ease. The RELiON Legacy Series is built to withstand a wide range of temperatures, with a discharge and charge range of -4°F to 131°F (-20°C to 55°C) and a storage range of 23°F to 95°F (-5°C to 35°C). This makes them reliable for both residential and commercial solar energy applications, even in extreme weather conditions.
Certified to meet UN38.3, CE, UL1642, and IEC62133 safety standards, these 48V batteries ensure high performance and safe operation. Backed by a 10-year warranty, which includes a 7-year free replacement or repair period, RELiON batteries provide users with long-term peace of mind. Available in various capacity options (RB48V100, RB48V200, and RB48V300) and compatible with the recommended 90PCI4818CH charger, the RELiON Legacy Series offers a dependable, future-ready power solution for solar energy systems, off-grid setups, and commercial energy storage. Whether you're building a new solar system or upgrading an existing one, these 48V lithium batteries offer efficient, maintenance-free energy storage with the capacity to scale as your power needs grow.
Learn more at our blog post - RELiON Legacy Series – Deep Cycle Lithium Batteries. Watch a video on how to read a RELiON data sheet.
- Rated up to 48V. Nominal Voltage: 51.2V
- Parallel connections made up to 12 units.
- Rated for UN38.3& CE (battery), UL1642 (cells), (File# MH64523), IEC62133 (cells), Shipping Classification UN 3480, CLASS 9
- Recommended Charge Voltage: 56.0 V - 58.4 V (Solar applications)
- Discharge Temperature: -4 to 131 ºF (-20 to 55 ºC)
- Charge Temperature: -4 to 131 ºF (-20 to 55 ºC)
- Storage Temperature: 23 to 95 ºF (-5 to 35 ºC)
- 10-year Warranty – 7 Year Free Replacement or Repair Period
- Download Data Sheets: RB48V100, RB48V200, RB48V300,BCI Group Chart
- Recommended charger is 90PCI4818CH
- *Can not be shipped outside the US contiguous states
- *All RELiON Hazmat items are not eligible for return to Del City. Please review our return policy.
- *Potential 1-2 week shipping delay for all hazmat items
| 12V | 24V | 36V | 48V | DIGITAL MONITOR | |||||||||||||||||
| Item | Description | Price |
Qty in
Package |
Add to Cart |
| RB48V100 | RELiON RB48V100, LIFEPO4 Legacy Lithium Battery 48V, Not Series Capable, 51.2V, 1051.2V 100 Amp Hour, HAZMAT
|
3,495.95 | 1 EA | |
| RB48V200 | RELiON RB48V200, LIFEPO4 Legacy Lithium Battery 48V, Not Series Capable, 51.2V, 200 Amp Hour, HAZMAT
|
6,995.95 | 1 EA | |
| RB48V300 | RELiON RB48V300, LIFEPO4 Legacy Lithium Battery 48V, Not Series Capable, 51.2V, 300 Amp Hour, HAZMAT
|
9,995.95 | 1 EA |
RELiON® Legacy Accessories - Digital Monitor
Mastervolt BattMan Battery Monitors: Accurate, Affordable Power Management for Marine, RV, and Solar Applications
Mastervolt BattMan Battery Monitors are essential tools for real-time battery management, offering precise monitoring for 12V and 24V DC battery systems. Designed with a large, splash-proof (IP65-rated) display, these monitors provide critical insights into battery performance, helping users maintain optimal power usage. Available in two versions — the BattMan Lite and the BattMan Pro — these monitors are ideal for marine, RV, and solar applications, offering flexibility and advanced battery tracking features.
The BattMan Lite displays essential metrics, including voltage, current, amp-hours, time remaining, and battery capacity percentage. For those seeking more advanced monitoring, the BattMan Pro offers all the same features plus the ability to collect historical data, display special battery status events, and provide a real-time countdown of the remaining time before the battery requires charging. This ensures users are never caught off guard by a depleted battery bank.
Both models support two battery outlets: a fully monitored service battery and a starter battery (voltage-only monitoring). With a wide voltage range of 0-35V, these monitors are compatible with most 12V and 24V battery banks. While the BattMan series is not MasterBus compatible, it does require a 6-wire connection cable for proper setup. Offering easy-to-read data and advanced power management, the BattMan Pro is ideal for users who want detailed insights into battery health and energy usage, while the BattMan Lite provides a simpler, budget-friendly alternative. Whether you’re managing a marine vessel, an RV, or a solar-powered system, the Mastervolt BattMan monitors keep you informed and in control of your battery power.
- Number of battery outlets: 2; service (fully), starter (voltage)
- BattMan Lite Display/read-out: voltage, current, amp-hours, time remaining, battery capacity in %
- BattMan Pro Display/read-out: voltage, current, amp-hours, time remaining, battery capacity in %, special battery status events
- BattMan Pro collects historical data and displays remaining time indication
- Voltage range: 0-35 V
- MasterBus compatible: No
- Connection cable (6-wire) necessary: Yes
- Modular cable necessary: No
- Download Data Sheets: 9070405060, 9070405070, BCI Group Chart
| 12V | 24V | 36V | 48V | DIGITAL MONITOR | |||||||||||||||||
| Item | Description | Price |
Qty in
Package |
Add to Cart |
| 9070405060 | Mastervolt 70405060, BattMan Lite Digital Monitor, 12/24V
|
278.95 | 1 EA | |
| 9070405070 | Mastervolt 70405070, BattMan Pro Digital Monitor, includes shunt for use with Legacy (RB) batteries, 12/24V
|
343.95 | 1 EA |
