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The AIMS Power Isolator and Lithium Battery Regulator Kit combines the BATISO300 Dual Battery Sensing Isolator, the LFP12V200AREG Lithium Battery Regulator and an emergency manual switch. Together they manage alternator charging on a 12V vehicle, control charging voltage to a lithium auxiliary battery and keep the starting and auxiliary batteries apart when voltage drops.
AIMS built this kit for commercial vehicles, fleet installations and high demand mobile power, including work trucks, food trucks, emergency and service vehicles, and overland and mobile power systems. It's a fit for anyone adding a large LiFePO4 auxiliary battery bank behind a high-output alternator who wants charging and isolation handled automatically.
The regulator supplies power when its input is between 9.4V and 14.4V. If the source drops below 9.2V or rises above 14.6V, it disconnects the lithium battery from the alternator or other charging source. Once voltage is back in the 9.4V to 14.4V range, it resets after a 2 minute delay and resumes charging.
The isolator monitors both batteries. When either one reaches 13.2V, it connects them after a 5 second delay. When system voltage drops below 12.7V, it separates them after a 10 second delay, which protects the starting battery from deep discharge when the auxiliary battery is heavily or continuously used.
The isolator lets the batteries charge from the alternator, solar panels or external battery chargers. Because it senses both sides, the main battery can also be charged from the auxiliary battery once charging voltage is reached. The regulator accepts alternators up to 200 amps as well as wind, hydro or other 12V charging sources.
AIMS says the regulator keeps regulating whether the vehicle runs for 1 hour or 20 hours. It has no time-limited charging restrictions, so it can charge large battery banks during long shifts and extended drive times.
The 200 amp regulator disconnects after 1 minute between 200A and 250A, after 10 seconds between 250A and 300A, and immediately above 300A. It resets after 2 minutes once current is back in range. The isolator is rated for 300 amps of continuous current.
The manual switch plugs into the isolator's 3.5mm jack. Press it and the isolator links the batteries for 60 seconds, even without alternator input and even when both batteries are below 12.7V. Its LED flickers 2 times for over-voltage above 15.5V and 3 times for a voltage drop below 12.7V.
Commercial work trucks. Run lighting and inverter loads from a lithium auxiliary battery while the starting battery stays ready.
Food trucks. AIMS calls out refrigeration, lighting and inverters running continuously, where automatic isolation keeps starting power available.
Fleet, emergency and service vehicles. Handle high-output alternators, continuous electrical loads and long shifts with hands-off charging control.
Overland builds and RV lithium upgrades. Charge a lithium house battery from the alternator on the road, then top it up from solar or an external charger at camp.
AIMS says using only a regulator or only an isolator leaves gaps in protection. The regulator manages charging safety, with over-voltage and low voltage disconnect. The isolator manages battery connection and separation, protecting the starting battery. The kit gives you both in one order.
The BATISO300 works from battery voltage, so no ignition connection or manual switching is needed. AIMS lists that as a faster, simpler installation, and the manual switch is there for the times you want to link the batteries yourself.
This is a 12V kit. The regulator is a 200 amp model for alternators up to 200 amps, so don't connect loads to its output that exceed 200 amps. The isolator handles up to 300 amps continuous. AIMS's diagrams show a starting battery, which the regulator manual labels lead acid, and a lithium auxiliary battery.
AIMS says the regulator should be installed by a person trained in vehicle electrical systems, following SAE and the vehicle manufacturer's wiring procedures, inside the vehicle in a dry, protected spot. AIMS's kit diagram runs the starting battery through a 200A fuse to the isolator, the isolator to the regulator and the regulator through a second 200A fuse to the lithium battery. Use cable rated for 200 amps, fuse the positive leads close to the power source and ground the auxiliary battery negative and the isolator to the chassis, removing paint at the isolator ground for a good connection. AIMS calls for 6 AWG wire for the regulator's chassis ground. Fuses and cables are not among the kit's components.
No. The regulator's input port is labeled Alternator, but AIMS says that connection is for the main battery. Do not connect it directly to the alternator. The auxiliary battery positive goes to the port labeled Battery.
Yes. The isolator allows charging from solar panels and external battery chargers, and AIMS's kit diagram shows a solar panel, inverter charger, converter or charger, or utility power as common external charging sources for the lithium battery.
AIMS lists the isolator's standby current at less than 5mA. It also notes that the switch LED may light for a short time after the vehicle is turned off, which is normal.
AIMS backs the kit, the isolator and the regulator with a 3 year warranty.
The AIMS Power Isolator and Lithium Battery Regulator Kit pairs a 300 amp dual sensing isolator with a 200 amp lithium regulator and an emergency manual switch, so your alternator charges the lithium battery within a safe voltage range and your starting battery stays protected. If you'd like help checking your alternator, batteries or wiring plan, the Outbound Power team is happy to help.
AIMS Power 12V Dual Battery Sensing Isolator and Lithium Battery Regulator Kit for Alternator Charging Specifications |
|
|---|---|
| Kit Contents | |
| Isolator | BATISO300 Dual Battery Sensing Isolator, 300 amp |
| Regulator | LFP12V200AREG Lithium Battery Regulator, 200 amp |
| Manual Switch | BATISOSW emergency manual switch |
| System Voltage | 12V |
| Kit Weight | 4 lbs |
| Dual Battery Sensing Isolator (BATISO300) | |
| System Voltage | 12V |
| Auto-On Voltage | >13.2V |
| Auto-Off Voltage | <12.7V |
| Turn On Delay | 5 sec |
| Turn Off Delay | 10 sec |
| Max Continuous Current | 300 AMP |
| Standby Current | <5mA |
| Charging Sources | Alternator, solar panels or external battery chargers |
| Ignition Connection | Not required |
| Manual Switch Jack | 3.5mm |
| Lithium Battery Regulator (LFP12V200AREG) | |
| Rating | 200Amp |
| Voltage Input | 9.4-14.4Vdc |
| Output On | Input voltage 9.4-14.4Vdc |
| Output Off | Input voltage <9.2Vdc or >14.6Vdc |
| Automatic Reset | After 2 minutes once voltage or current is back in range |
| Over Current, 200A to 250A | Disconnects after 1 minute |
| Over Current, 250A to 300A | Disconnects after 10 seconds |
| Over Current, Above 300A | Disconnects immediately |
| Charging Sources | Alternators up to 200 amps, wind, hydro or other 12V sources |
| Charging Time Limit | None |
| Ports | Alternator (main battery) and Battery (auxiliary battery) |
| Weight | 1.7 lb |
| Dimensions (L x W x H) | 7.825 x 4.75 x 2.125 in |
| Emergency Manual Switch (BATISOSW) | |
| Manual Link Time | 60 seconds |
| Works When | Both batteries below 12.7V, no alternator input needed |
| Fault LED, Error 1 | 2 flickers, over-voltage >15.5V |
| Fault LED, Error 2 | 3 flickers, voltage drop <12.7V |
| Installation | |
| Installer | Person trained in vehicle electrical systems (regulator) |
| Regulator Location | Inside the vehicle, dry and protected |
| Regulator Cable Rating | 200 amps |
| Regulator Chassis Ground | 6 AWG wire |
| Fusing | Fuse close to the power source on the positive lead; AIMS kit diagram shows 200A fuses |
| Isolator Ground | Isolator ground terminal and auxiliary battery negative to chassis |
| Warranty | |
| Warranty | 3 years |
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