12 Volt Electrical Distribution and Charging System

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Digital Volt Meter

Digital Amp Meter

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12V Power

Signal Input

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12V Power from Metered Voltage

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DVM SPDT SPDT Center off

HCB-DPDT ON/ON

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AM SPST ON/OFF

12 Volt Buss From House batteries

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H Sol

HB Solenoid HB Disconnect

Solenoids 2-TE 2-CH Tyco Electronics EV200AAANA 500 Amps Continuous 2000 Amps Momentary H and ES Solenoids Cole Hersee 24200 Latching 200 Amps Continuous HI and B Solenoids

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House Batteries Lifeline GPL-4C AGM 6 Each – 6 volt 660 AMP Hours

BA-DPDT ON/ON

HB Shunt

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Inverter/Converter Magnum 3000

HI Sol

Shunts 500 Amps to 50 MV

A Shunt

Alternator Lease Neville 160 Amps

Alternator Output

B Sol

Control Switches 3 H Sol Switch SPST Toggle ON/OFF

ES Sol

B Sol and ES Sol Switch Momentary Rocker ON/OFF HI Sol switch Momentary Pushbutton ON/OFF

Isolator

CB Shunt

Chassis Batteries Positive Output

Chassis Batteries Trojan Mileage Master GEL 2 - 12 volt – 1000 CCA

12 Volt Electrical Distribution and Charging System

Switches and Solenoids function and placement

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1. All switches are mounted in the main or auxiliary side dash. 2. HI Sol, B Sol and ES Sol are mounted on the fire wall next to the Isolator. 3. H Sol is mounted on the electronics panel just outside the battery box. 4. HI = House Isolator Solenoid or Switch 5. B = Boost Solenoid or Switch 6. ES = Engine Start Solenoid or Switch 7. H = House solenoid or Switch 8. All Shunts are within 0.050 Volts of ground potential. 9. The DVM SPDT Center OFF selects House or Chassis voltage to be displayed. 10. The HCB-DPDT selects between the House or Chassis Battery shunts for the Red Lion display. 11. The BA-DPDT selects between the Battery or Alternator shunts for the Red Lion display. 12. The AM SPST provides 12 volt power for the Red Lion display. 13. The HCB-DPDT and BA-DPDT switches are left and right of the Road Relay 4. 14. The AM SPST is the top right switch of the four small switches on the left auxiliary dash. 15. The BES momentary rocker switch is the top right switch on the left auxiliary dash. 16. The added LEDs provide visual feedback to the state of the solenoids and are controlled by the remainder of the small switches on the lower left auxiliary dash. The plastic clip provides feedback that the head lights are on.

HI Solenoid

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H Solenoid

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The HI solenoid is normally kept in the open state and is activated using a pushbutton ON/OFF switch. This solenoid is latching and is mechanically held so each push of the button reverses the previous state of the solenoid. The open state of the solenoid will insure no current from the alternator will reach the House batteries until the user determines the alternator can supply the current necessary to prevent over working the alternator. Examples would be: 1. You wish to wait until the Chassis Batteries are fully charged before sending current to the house batteries. 2. You wish to separate the two charging systems because you are running the generator to charge the House batteries via the converter. 3. You are charging the House batteries as you drive using solar.

The H solenoid is normally kept in the closed state. Opening this solenoid will remove the House batteries from supplying power to the 12 volt house buss.

This solenoid will be opened when the user wishes to run the house while driving using the alternator to supply the power to the house and inverter if used. Running the House and Chassis using the alternator should only be attempted after the Chassis batteries are fully charged. This will insure a lighter load for the alternator. It would also be wise to have a shunt on the alternator so alternator current could be monitored. Try to keep the alternator current below 50 % of alternator rated output. I operate a 24 inch LCD monitor requiring 110 volts from my inverter for GPS software as well as the 12 volt requirements for House and Chassis. Once the Chassis batteries are fully charged my alternator output is a little over 30 amps while driving with the House batteries off line.

B and ES Solenoids

The B and ES Solenoids work together provide charging current for the Chassis batteries and Starting (Boost) current for the engine. The B solenoid is a latching solenoid and has a continuous current rating of 200 amps. The ES solenoid is not latching and has a continuous rating of 500 amps. Both solenoids operate from the same spring loaded momentary rocker switch. Preceding the start of the engine the B solenoid is latched closed or open depending on whether you are providing charging current to the Chassis batteries or not. Pressing the rocker switch closes the ES solenoid and drops out the B solenoid. When the engine starts a release of the rocker switch opens the ES solenoid.

12 Volt Electrical Distribution and Charging System

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Here are some of the switches that control the solenoids: 1. The two switches on each side of he Road Relay 4 (BA-DPDT and HCB-DPDT) determine the shunt providing the input to the display below the Road Relay. 2. The square red pushbutton to the right of the Road Relay is the pushbutton for the HI solenoid. 3. The black handled toggle switch above the SmartTire monitor is the switch controlling the H solenoid. 4. The LEDs to the left of the AUX POWER text shows the state of the H Sol and HI Sol Solenoids. 5. The LEDs to show the state of the generator were relocated above the word GENERATOR to make room to mount the Sirius radio. The LEDs are barely seen in the top of the photo. 6. The top of the backup monitor was tilted backwards 1 inch with PC board spacers to permit a better viewing angle and show the color depth and contrast properly.

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12 Volt Electrical Distribution and Charging System

12 Volt Electrical Distribution and Charging System

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(3)

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1. The red handled toggle switch (DVM SPDT Center Off) in the middle provides input to the digital volt meter. Up is House while down is Chassis batteries. The switch is currently centered and is providing no input to the volt meter. 2. The black handled toggle switch provides high or low panel decorative lighting. When I purchased this coach the potentiometer and voltage controller for this lighting was fried. I called the manufacture and found that this feature was installed with a built in failure. The controller requires a minimum voltage or it will burn up and take the potentiometer out as well. When operating the marker or headlights with the potentiometer at a minimum does not provide the minimum voltage to the controller and it will burn up. I added this toggle switch with a resistor on the low position to provide that minimum voltage and give the user a high and low setting for the decorative lighting. 3. Momentary rocker switch to control the B Sol and ES Sol Solenoids. 4. Group of small SPST switches that control the 12 volt power for the Red Lion (AM SPST), and visual feedback for LEDs as to the state of other solenoids and the headlights. 5. Feedback LED

12 Volt Electrical Distribution and Charging System

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Amp meter showing selected shunt current

12 Volt Electrical Distribution and Charging System

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This shows visual and tactile feedback that the headlights are on and the BA DPDT switch.

12 Volt Electrical Distribution and Charging System

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Digital Volt meter and visual feedback LED showing the state of the marker and headlights. Great aide for the audio challenged.