Selection and Wiring for ETA Charge Controllers

1. Bare wire connections under the PBRL charge regulator terminal blocks are acceptable. PBRL models accept up to two #10 gauge bare wire inputs under each terminal clamp.

2. When the battery temperature reaches the pre-set maximum voltage level at a given temperature, the PV module input will be shorted ("shunted") to a value near zero volts. The battery voltage will gradually drop back to a lower voltage, at which point the regulator will release the PV input, and charging will resume.

3. When the battery reaches the pre-set low voltage level at a given temperature, the regulator shuts the load down until the battery voltage is restored to one volt above the low voltage level.

4. There are no field adjustments. The "Shunt" voltage level is factory set.

When installing the PBRL charge regulator, locate or mount the unit in or near the battery storage location. This will allow the charge regulator to approximate the temperature of the battery system and ensures that temperature compensation takes place.

Wiring Instructions

1. Ensure that the photovoltaic array is properly wired to match the nominal operating voltage of the regulator and battery system. Proper wiring diagrams for PV module/array can be obtained from the manufacturer or system designer. Identify the positive and negative leads of the PV array prior to connecting the charge regulator.

2. Connect the battery leads to the terminal blocks on the PBRL charge regulator labeled "Battery", also ensuring that the polarity of the battery leads are matched to the polarity of the terminal blocks.

3. Due to the regulator's very high efficiency, it will be destroyed if hooked up improperly. Connect the PV array input leads to the terminal blocks on the PBRL Charge Regulator labeled "PV Array", ensuring that the polarity of the input leads are matched to the polarity of the terminal blocks.
(positive to positive, negative to negative)

4. Connect the negative lead of the load to the terminal block labeled load.

5. Connect the positive lead of the load to the postive terminal of the battery bank.

Note: the regulators are protected if the battery connections are removed and the PV array remains connected. (It will rapidly turn on and off without overheating)