Specifications

accuracy of the predicted time remaining readout . This can either be in °C or °F

depending on parameter 5.

New Battery Installation

The Drifter unit is a smart battery monitor in that it is able to learn the actual

battery capacity and thus provide more accurate “Time Remaining” feedback to

the user. When an existing battery is replaced by a new one, the capacity of the

new one is likely to be much higher.

Fitting a new battery and doing nothing else will result in the “Time remaining”

display initially being quite inaccurate. As the battery is charged and discharged

during normal use, the Drifter unit will learn the battery capacity of the new

battery.

Capacity Learning

This procedure should only be used when an existing battery has been replaced

with a new battery.

The general method the Drifter uses to learn the battery capacity is to measure

the Amp-hours required to flatten a fully charged battery.

The detailed process we recommend is as follows:

1. Enter the Setup Mode and view the Battery Capacity parameter. It should

be set to the manufacturer's rated capacity for that battery. e.g. 100 Ah

2. Dis-connect all power to the Drifter for 5 seconds and then re-connect.

This allows for the Drifter to reset all counters for the new battery capacity

therefore learning the battery faster.

3. Charge the battery until the State of Charge reads 100%. Then further

charge the battery for 24hrs.

4. Stop charging the battery. i.e. remove the 240V power.

5. Switch on loads (e.g. lights, TV etc.) until the battery is being discharged

at 10% – 20% capacity rate.

e.g. If you have a 100 Ah battery, 10% of 100 is 10, 20% of 100 is 20.

So, adjust the loads until the battery current reads between 10A and 20A.

Note: When discharged at the 20% rate, the discharge time will be

approximately 5 hours. At the 10% rate, the discharge time will be

approximately 10 hours.

6. Wait until the battery voltage reaches 10.5 V.

If you are using the Drifter with a Setec power supply, this will not damage

the battery. These power supplies have a low voltage disconnect which

protects the battery from discharging to a damaging level. With these

products the flat battery state will be indicated by the battery current