300A 48V red 4 way copper busbar box with M8 terminals
300A 48V red 4 way copper busbar box with M8 terminals
SKU:BBR-300
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Solarika BBR-300 Battery Relay
High-Current 300A Bi-Directional Split Charge Isolator
The Solarika BBR-300 is a heavy-duty 12V battery booster and isolation relay engineered for demanding dual-battery environments. Whether you are managing a winch, a high-output inverter, or a split-charging leisure battery system in a motorhome or boat, the BBR-300 provides seamless power management without the voltage drop associated with traditional diode isolators.
Key Features
- ✔ 300A Continuous handling capacity
- ✔ Bi-Directional Sensing for dual charging
- ✔ Zero Voltage Drop mechanical switching
- ✔ IP65 Weatherproof sealed construction
- ✔ Surge protected electronics
Technical Specs
| Nominal Voltage | 12V DC |
| Continuous Current | 300A |
| Peak Current (Surge) | 1000A |
| Engage Voltage | 13.3V DC |
| Disengage Voltage | 12.8V DC |
| Terminals | M8 Stainless Studs |
Compatibility / Fitment Guide
| Application | System Type | Notes |
|---|---|---|
| Marine / Boats | 12V Outboard/Inboard | Corrosion resistant terminals. |
| RV / Motorhomes | Split Charge System | Ideal for T4/T5/T6 and Sprinters. |
| Solar Off-Grid | Battery Bank Isolation | Supports Bi-Directional solar charging. |
OEM Cross Reference
| Manufacturer | Part Number Reference |
| RV Custom Products | EB300 |
| Intellitec (Equiv) | 00-00507-000 / 00-00507-512 |
| KeyLine Chargers | VSR-300-PRO |
Installation Guide
Mount the relay as close as possible to the primary battery. Connect the primary battery to the "Main" stud and the auxiliary battery to the "Aux" stud. Ensure a solid ground connection for the sensing wire. For 300A loads, use minimum 50mm² (0AWG) copper cabling to prevent overheating. Professional installation is heavily recommended.
Questions & Answers
Is this a genuine original part?
This is a premium Solarika high-current replacement part, manufactured to meet or exceed original equipment (OE) standards for heavy-duty power management.
How do I know if it is compatible?
Check your current relay's amperage and voltage. If you require a 12V system with a draw up to 300A continuous, the BBR-300 is the correct high-performance upgrade.
Can this relay be used with Lithium (LiFePO4) batteries?
Yes. Because it is a mechanical relay with bi-directional sensing, it will work with Lithium banks provided your charging source (alternator/solar) is regulated for Lithium voltages.
Note: Please verify your original part number and system amperage requirements against the references above before purchasing. Distributed by Solarika.co.uk.
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