User Manual

TEMPERATURE COMPENSATION

& SENSOR INSTALLATION

For charge accuracy and safety, many systems use a sensor mounted to the battery to

measure cell temperature and adjust charge voltage accordingly. Temperature sensors

should be installed directly on the side of a cell or battery in the center of the bank

and must be securely mounted below the electrolyte level to determine accurate cell

temperature. See Figure 6 Temperature Sensor below. When using chargers that do not

feature temperature compensation, voltage settings should be monitored and adjusted

based on actual cell temperature. Failure to use or properly install the provided sensor

may cause damage due to over/undercharge which is not covered under Rolls Battery

manufacturer warranty. As a precaution, this sensor may also trigger a programmed

safety charge cut-off as the battery bank should not exceed an operating temperature

of 52ºC (125ºF).

NOTE: FOR ACCURACY, THE TEMPERATURE SENSOR SHOULD NOT BE MOUNTED

TO THE BATTERY TERMINAL OR TOP OF THE BATTERY CASE.

Series 4000, 4500, VRLA AGM & OPzV GEL models – the temperature sensor should

be mounted on a battery in the middle of the string or battery bank. To ensure an accurate

reading of cell temperature, the sensor must be mounted below the liquid level on Flooded

models and not attached to a terminal or top of the battery case as these areas are

generally cooler than the internal cell. For traditional Flooded, VRLA AGM & OPzV GEL

models, Rolls recommends attaching the sensor half way down the side of the battery and/

or 10-12cm (4-5”) from the top of the case for the most accurate temperature reading.

Dual-Container Models – If the battery has a modular, dual-container construction, the

temperature sensor must be mounted directly to the side of an internal cell. To access the

cell, disconnect the terminal connections and remove the outer cover which snaps on

to the case or may use small removable plastic pins. Mount the sensor to the internal

cell and run the connecting cable between the case, being careful not to pinch or damage

the wire when placing the cover back on. Automotive silicone is used to seal around each

terminal to protect against spills, dust & debris. This may be reapplied when the case has

been reassembled.

FIGURE 6:

Temperature

Sensor

Dual-Container Models - Remove case cover. Mount sensor to the side of internal

cell below liquid level. Replace the cover and re-seal around terminals with silicone.