Photovoltaic Battery Charge Regulator

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ETA Engineering, Inc.

4049 E. Presidio St., Suite 117

Mesa, AZ 85215

Phone: 480-966-1380

Toll Free: 1-877-964-4188

Fax: 1-480-966-1516

info@etaengineering.com

ETA Charge Regulators: Built-in Reliability

Battery Charging Methodology

Arizona Solar Energy Association

Arizona Solar Center

American Wind Energy Association

American Hydrogen Association

Phoenix Electric Auto Association

Scottsdale Green Building Program

Note: Prices are subject to change without notice due to changes in other vendors' prices to us. These changes may arise from normal product development plus fluctuations in foreign exchange rates and commodity prices.

Frequently asked questions (FAQ).

PBR: Photovoltaic Battery Charge Regulator

9 Amp PBR Charge Regulators

Rated Input Current- 18 Amp

Surge Rating- 36 Amps for 20 sec

Voltage(s) Available- 12, 24, 48 VDC

Mounting Holes- Two 3/16"

Weight- 0.88 lb (0.13 kg)

Dimensions (in)- 4.75 x 3.88 x 1.75

PBR12-9 (12 Volt, 9 Amp)

PBR24-9 (24 Volt, 9 Amp)

22 Amp PBR Charge Regulators

Rated Input Current- 22 Amp

Surge Rating- 44 Amps for 20 sec

Voltage(s) Available- 12, 24 VDC

Mounting Holes- Two 3/16"

Weight- 0.88 lb (0.13 kg)

Dimensions (in)- 4.75 x 3.88 x 1.75

PBR12-22 (12 Volt, 22 Amp)

PBR24-22 (24 Volt, 22 Amp)

32 Amp PBR Charge Regulators

Rated Input Current- 32 Amp

Surge Rating- 64 Amps for 20 sec

Voltage(s) Available-12, 24, 48 VDC

Mounting Holes- Two 3/16"

Weight- 1.625 lb (0.74 kg)

Dimensions (in)- 7.0 x 4.75 x 1.75

PBR12-32 (12 Volt, 32 Amp)

PBR24-32 (24 Volt, 32 Amp)

44 Amp PBR Charge Regulators

Rated Input Current- 44 Amp

Surge Rating- 88 Amps for 20 sec

Voltage(s) Available- 12 VDC

Mounting Holes- Four 3/16"

Weight- 1.625 lb (0.74 kg)

Dimensions (in)- 7.0 x 4.75 x 1.75

PBR12-44 (12 Volt, 44 Amp)

Battery Capacity Meter (BCM)

Voltages Available- 12, 24, 36, 48

Cable Length- 60 in

Accuracy- 0.05 Vdc (12 Vdc)

Weight- 0.375 lbs (0.170 kg)

Dimensions (in) - 2.0 x 4.0 x 0.75

BCM12 (12 Volt)

BCM24 (24 Volt)

BCM48 (48 Volt)

Selecting and Wiring your PBR Regulator

Features

Parallel Switching Shunt

When the maximum charging voltage at a given temperature is reached, the parallel switch (U.S. Patent #4661758) automatically shunts the solar array to prevent overcharging the batteries.

Temperature Compensation

To extend battery life and prevent stratification, these regulators automatically adjust for the temperature of the batteries.

Durable Construction

Specifically designed for developing nations and sustainable development projects, ETA controllers are extremely rugged. ETA mounts the regulator's circuit board in an anodized aluminum heat sink and then encapsulates it in an epoxy-resin. This ensures that the regulator circuitry is protected from the environment.

Pulse Width Modulation

Automatically adjusting to the load requirements, battery state of charge, and battery age, Pulse Width Modulation (PWM) brings the battery up to maximum charge without trickle charging. This design maximizes battery life and continuously adjusts to the battery requirements as opposed to 3-stage charging.

Overload & Transient Surge Protection

All regulators provide an overload rating of twice the specified input current for 20 seconds to accommodate the "edge of cloud effect". Solid state transient absorbing avalanche diodes protect the charge controller from lightning induced surges and inductive load spikes.

Solid State Electronics

ETA Engineering's solar charge controllers have no moving parts that can fail. To ensure safety, ETA excludes the use of mercury switches from all of our regulator designs.

High Reliability

These designs use High Safety Factors to minimize stress on all critical components, which gives exceptional life. Products using this design installed in the late 1980's are still going strong.

High Efficiency

The regulators contain blocking diodes chosen for minimum forward voltage drop which maximizes charging current from the PV module(s). The static current draw is only about 2 milliamps plus the current to drive any LED that may be on.

OEM, Dealer and Distributor Inquiries Welcomed.

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Last updated: December 19, 2008