I’ve fitted the Ablemail AMT 12 that arrived in the post today. The last one was broken, but not discovered until testing after it was installed. I sent it back for testing and replacement but Royal Mail lost it. I’ve made a claim but they want 30 days to process the claim. I called after 6 weeks and they told me the cheque was in the post but I’d have to wait up to 18 days before I could claim not to have received it. Unbelievable. If they’d not imprisoned so many staff they might be able to deliver a parcel and a letter on time.
Hopefully the Ablemail is installed correctly. I don’t know how to tell when it’s working.
After I fitted mine I did some searching online for an idiots guide, and found this AI generated bumph on Google, which helped quite a bit....
The Ablemail AMT12-2 is a trickle charger/battery maintainer designed to keep a vehicle's starter battery charged from a leisure/auxiliary battery when the leisure battery is being charged by a solar or mains charger. It does this by drawing a small current from the leisure battery to trickle charge the vehicle battery, ensuring the leisure battery is charged first.
Here's a more detailed explanation of how it works:
1. Charging Source and Conditions:
• The AMT12-2 is intended to be used when a solar or mains charger is connected to the leisure battery, which is typically used for auxiliary power in vehicles like campers, vans, or RVs.
• It can also work even if the leisure battery isn't being actively charged, as long as the voltage thresholds are maintained.
2. Trickle Charging Mechanism:
• When the leisure battery voltage is above a certain threshold and the vehicle battery voltage is below a threshold, the AMT12-2 activates.
• It then charges the vehicle battery for a brief period (e.g., 3 seconds) and then pauses for a longer period (e.g., 15 seconds).
• This pulsing action helps to trickle charge the vehicle battery without excessive current draw.
• The charging current is limited to a maximum of 3A.
3. Voltage Monitoring and Configuration:
• The AMT12-2 monitors the voltages of both the leisure and vehicle batteries.
• It can be configured by the user to adjust the voltage thresholds and charging parameters, especially for different vehicle types (e.g., those with smart alternators or regenerative braking) and for lithium batteries.
• The unit also automatically detects 12V or 24V battery systems.
4. Battery Protection:
• The AMT12-2 prevents charging the vehicle battery if it's excessively flat (e.g., below 11.5V).
• It also ensures that the leisure battery is charged first before trickle charging the vehicle battery.
5. Low Current Draw:
• The AMT12-2 has a very low current draw in standby mode (less than 2mA on a 12V system), minimizing the drain on the leisure battery.
In essence, the AMT12-2 acts as a bridge between the leisure battery and the vehicle battery, ensuring that the vehicle battery stays charged when the leisure battery is being replenished by a charging source, while also prioritizing the charging of the leisure battery itself.
_