FAQ

No, it is normal that every 110 minutes the voltage decreases for 5 minutes, but you should not see an increase in current; you should read zero. It is normal, however, that after 5 minutes the voltage and current return to normal trickle charge conditions. It appears that there is an external load connected directly in parallel with the battery.

The transition from fast charge to menten occurs when the current drawn by the battery falls below 12% of the current set by the trimmer.

Yes. The voltage and current change only occurs if you have set the fast charge jumper to position 6. You probably forgot to insert it.

The transition from one phase of battery charging is not determined by the

Time but rather by voltage and current measurements.

Recovery: the batteries are supplied with current pulses until the voltage exceeds the threshold of 18V.

Charge -boost / absorption: the condition is terminated when the current drawn by the batteries falls below 1/8 of the current set by the trimmer (time out of 15 hours and a minimum of 1 minute per period)

Trickle / Float: return to Boost Charge with the closure of the fast charge jumper (pos.6 ) or when the battery voltage drops below 24V and the current drawn by the batteries is greater than ¼ of the current set by the trimmer.

The maximum charge of 15h is intended as a timeout guarantee. The switch to maintenance occurs when the current drawn by the battery falls below 12% of the current set by the trimmer.

Durability testing is conducted by an impedance test every 110 min. The internal software has a proprietary algorithm that can discriminate whether a battery is sulfated. This test is performed every 110 min, and if after 2 cycles in sequence (2 x 110 = 220 min) in which the test is negative, the alarm will activate indicating that the battery is sulfated and must be replaced. The life test can be enabled by setting a jumper in position 4 (see page 5 instruction manual).

We specify power dissipation in our manual as "dissipation at maximum load " in watts. The conversion from watts to BTUs is as follows: 1 watt is equal to 3.41214163513 BTUs per hour.

These are 2 different tests. Every 60 seconds, we test the status of the terminal connections. This is based on impedance measurement, and we have to draw current from the battery for a short time. The LED signal "battery not connected" will appear immediately after the battery is disconnected. This is based on voltage measurement.

RTCONN: is the cable for position 5 and position 6 (Fast Charge)

RJTEMP: is the external temperature probe for battery charge compensation

(please refer to the instruction manual pages 6-7)

ERJ.CBI.004: is the RJ45 cable for connecting two CBI size 3 devices in parallel (please refer to the instruction manual)

Our CBI can work smoothly with performance down to -40°C. We are outside the warranty zone but the products work properly. If your concern is to avoid charging below -20°C, the best option is to install a separate thermostat on the battery output. This can be a simple external bimetallic thermostat.

The FLEX28024A has a built-in diode.

If the request is in reference to a redundant system, MR220 must also be entered as shown in the instruction manual on page 2.

This is the normal condition of the CBI world, the Charge output follows the battery output, but the maximum voltage is 28.8 Vdc (2.4 Vdc / cell max 15 hours)

Only if you set the jumper to position 6 (Fast Charge Enable) as shown in the instruction manual on page 6.

Otherwise, the output follows the maximum voltage set by Trickle charge depending on the position of jumper 1-2-3 (see instruction manual page 5).

Adelsystem DC-UPS and battery chargers are suitable for all type of batteries: Lead Acid, Gel, AGM, Lead Crystal, NiCd, NiMh, Lithium and LiFePO4. You can find more information in the instruction manual in the Battery Type selection paragraph.

Yes, Adelsystem has developed two different charging profiles for Lithium battery and LiFePO4 battery with 7 or 8 cells. In addition, you can configure the Float and Fast charge voltages according to the specifications provided by the battery manufacturer. Please note that all lithium-ion batteries must be installed in accordance with the manufacturer's instructions.

To calculate the correct battery size for short-term backup, you can use following formula:

Load (A) × Backup Time (h) × Corrective Factor = Battery Capacity (Ah) 

The corrective factor accounts for battery type, aging, battery cables and safety margin.
Typical values: 1.2 for lithium, 1.5 for lead-acid systems.

The time required to charge a battery largely depends on the ratio between the battery's capacity and the charger's output. Other key elements influencing the charging duration include the type of battery being used and the energy demands of any connected devices.

For lead-acid batteries, a general guideline is to divide the battery’s capacity by the charger’s maximum output and then add around four hours. This additional time accounts for the absorption phase, during which the battery regulates the incoming current and its charge level increases from approximately 80% to full capacity.

However, this estimate does not take into account the power draw from any connected devices. 

Yes, the device is performing a test of the internal impedance of the battery. This happens every two hours if the Battery Life Test feature is enabled.