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The AIMS Power Automatic Dual Battery Sensing Isolator 300 Amp monitors both your starting battery and your auxiliary battery and connects them automatically when either one exceeds 13.2 volts. That lets your alternator charge the auxiliary battery while you drive, and it lets you charge the main battery from a solar panel or external battery charger connected to the auxiliary battery. When the whole system drops below 12.7 volts, the solenoid opens and isolates the starter battery from the auxiliary battery, so you never come back to a drained starter battery. Because it is automatic and voltage based, there is no need to tie it to the ignition, which saves installation time. It is rated for 300 amps continuous, IP65 splash proof, and backed by a 3 year warranty with lifetime tech support.
The isolator monitors both battery voltages. Once either battery reaches 13.2 volts, the solenoid automatically connects the auxiliary battery to the charging system.
When the entire battery system drops below 12.7 volts, the isolator opens and separates the starter battery from the auxiliary battery, protecting against a flat starter battery.
The dual sensing feature lets you charge the main battery from a solar panel or external battery charger on the auxiliary battery once the auxiliary battery reaches 80% state of charge (13.2 volts).
The isolator operates automatically based on voltage, so it does not need to be tied to the ignition. That saves installation time.
Maximum continuous current is 300 amps, and standby current is less than 5 milliamps. Turn on delay is 5 seconds and turn off delay is 10 seconds.
The optional manual switch (part BATISOSW) links the two batteries together with the push of a button, allowing current to flow for 60 seconds without the alternator even if both batteries are below 12.7 volts.
RVs and campers. Charge house batteries from the alternator while driving and keep the starter battery protected at camp.
Work trucks and service vehicles. Run auxiliary equipment from a second battery without draining the starting battery.
Overland and off-road vehicles. Add a dual battery system for fridges, lights and accessories.
Boats. Separate starting and house batteries while charging both from the engine.
Versus ignition-triggered isolators. This isolator is voltage sensing, so no ignition wire is needed.
Versus single sensing isolators. Dual sensing lets charging sources on either battery, such as solar on the auxiliary battery, help charge the starter battery.
Versus the AIMS Power lithium alternator regulator. AIMS Power recommends its LFP12VXXXAREG regulators (100A and 200A) when charging a lithium battery from the alternator and starter battery. Use the BATISO300 to keep your starting battery at 100% while discharging auxiliary batteries with the vehicle off, or use both together when you need both functions.
This may be a good fit if
When either battery exceeds 13.2 volts, after a 5 second delay.
When the battery system drops below 12.7 volts, after a 10 second delay.
Yes, with the optional manual switch, part BATISOSW, which links the batteries for 60 seconds.
AIMS Power backs this isolator with a 3 year warranty and lifetime tech support.
The AIMS Power Automatic Dual Battery Sensing Isolator 300 Amp automatically charges your auxiliary battery and protects your starter battery in 12 volt vehicles and boats. At Outbound Power, we help customers design dual battery systems. Contact our team and we will help you plan yours.
AIMS Power Dual Sensing Battery Isolator Specifications |
|
|---|---|
| System Voltage | 12V |
| Auto-On Voltage | >13.2V |
| Auto-Off Voltage | 12.7V |
| Turn On Delay | 5 Seconds |
| Turn Off Delay | 10 Seconds |
| Max Continuous Current | 300 Amps |
| Standby Current | <5mA |
| Environmental Rating | IP65 Splash Proof |
| Optional Accessory | Manual Switch, Part BATISOSW |
| Warranty | 3 Years and Lifetime Tech Support |
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