78 - DC TO DC CONVERTERSSolar Converters DC “Autotransformers”

These high-efficiency DC to DC converters can be used to step-up or step-down battery voltage. These converters are bi-directional so they can be used to increase or decrease voltage. They can be used to operate 12 volt loads on a 24 or 48 volt bat-tery system or to run a 24 volt refrig-erator on a 48 volt battery system. See the chart below for up and down voltage and current limits. 1-year warranty.

Vanner Voltmaster Battery EqualizerThis device allows you to

power 12 volt and 24 volt loads from a 24 volt battery system without unbalanc-ing the voltage in part of the battery bank. Without this device, if you draw 12 volt from part of a 24 volt battery bank, and charge the bank with a 24 volt charging sys-tem, the half of the bank that the 12 volt loads are not con-nected to will always be at a higher state of charge. This device allows you to draw 12 volts from the “lower half” of the bank while continuously recharging the “lower half” from the upper half. It automatically stops charging when the upper and lower half are at equal voltages. The 60-20A amp version can maintain even battery voltage with up to 20 amps of draw on 12 volt circiuts. The 65-60A allows the battery to supply up to 60 amps at 12 volts continuously. Inverters or other loads that are intermittantly larger than the equalizer’s capacity can be used as long as the average amp draw over time is less than the capacity of the device.

Vanner Model Voltage Description Item

Code Price

60-20A 12/24 20 Amp Battery Equalizer 45.8107 $35065-60A 12/24 60 Amp Battery Equalizer 45.8112 $600

Solarcon Model Voltage Amps @ Low

VoltageAmps @

High VoltageItem Code Price

EQ 12/24-20 12/24 20 10 38.8209 $180EQ 12/24-50 12/24 50 25 38.8751 $390EQ 12/48-10 12/48 10 2.5 38.8745 $235EQ 12/48-30 12/48 30 7.5 38.8760 $475EQ 24/48-10 24/48 10 5 38.8748 $235EQ 24/48-30 24/48 30 15 38.8754 $500

Samlex DC Step-Down Power ConvertersThese DC-DC con-

verters are designed to decrease, the DC volt-age that is input to the unit. These switching converters have a high efficiency and provide regulated 13.8 VDC output from and input of 20 -30 VDC. Use them tp power 12 volt lights and appliances from a 24 volt system.

Samlex Model

Output Max. Amps

Item Code Price

SDC-15 12 30.8720 $70SDC-23 20 30.8725 $88

Vanson SDR-70W Step-Up ConverterStep-up DC power

converters for note-book computers. This 70 watt converter is powerful enough to run most notebook computer from 12 volt batteries. They are a perfect addition to a Xantrex Power Pack. Input voltage from 11-14 VDC at up to 8 amps. The output can be set to 15, 16, 18, 19, 20, 22 or 24 VDC. Maximum output is 3.5 Amps at 15 to 20 VDC and 2.9 amps at 22 and 24 VDC. Five adapter plugs fit many computer. Others are available from electronic supply store.

Description Item Code Price

Vanson SDR-70W Step-Up Converter 30.8879 $70

DC Smart AdapterThe Smart Adapter is a high

efficiency DC to DC converter that converts the the 12 volt output from a car lighter socket to the voltage required to charge many brands of notebook com-puter battery or a cell phone, or power a device with a co-ax power jack that can operate on 30 watts or less at 6 to 19 volts. It can be used to power and charge small notebook computers, PDA’s and phones directly from a car cigarette lighter socket. Output voltage is adjustable from 6 to 19 volts. Choose one of the three enclosed coaxial ends included or purchase a specialty plug from an electronics supplier. Warranty: 1 year warranty

Description Item Code Price

Smart Adapter 30W Converter 30.8875 $39