06 2027 GT Series Electrical Features
General Information:
There are two electrical systems in your Tiffin GT Series Van. These are the 12-volt DC (VDC) system and the 120-volt AC (VAC) system. Most standard appliances require the 120-VAC system, while the majority of the lighting systems used in the Tiffin GT Series use the 12-VDC electrical system.
The house battery bank is charged by the 30A shore power plug running through the inverter/ charger. The auxiliary alternator also charges the batteries when the engine is running.
The electrical power for the 120 VAC is supplied by the 30 AMP shore power cord when the Tiffin GT Series is connected to an external power source. The inverter can also supply 120 VAC electrical power.
To connect the Tiffin Van to an external source of 120 VAC electrical power, it is first recommended that main 30-amp circuit breaker is in the “off” position. This is done to prevent any power surge upon connecting the Van to the external power source. The standard, flexible, power cord supplied with the Tiffin GT Series is designed to handle 30 amperes. Make sure that the pins in the male end of the plug are oriented correctly so they match the power cable, and they are in good condition (i.e., aren’t bent or damaged).
Note: Do not attempt to use any electrical adapters to convert the provided 30amp power cord, as this will damage electrical components inside the Van.
If there is a circuit breaker switch at the “plug” end of the power cord, that breaker should be turned “off” before making the connection. Insert the plug into the mating outlet and then turn the circuit breaker “on.” Close and lock the electrical compartment door to protect the contents and to keep them clean and dry. Close the cover on the power box, if so equipped, to avoid an unintentional disconnection and to keep the contents clean and dry. Then switch the main breaker to the “on” position.
Shore Power:
The Tiffin GT Series is equipped with the SmartPlug (Figure 6-1) for shore power, thoughtfully positioned at the rear of the driver’s side of the van to ensure convenient access and reliable connectivity. The 30-amp shore power cord (Figure 6-2) can be used to charge the house battery or power the Van directly.
Note: Do not attempt to use any electrical adapters to convert the provided 30amp power cord, as this will damage electrical components inside the Van.
Batteries:
The Tiffin GT Series offers reliable and efficient power solutions tailored to various energy needs. Equipped with the 540-Amp Hour Battle Born Lithium-Ion Battery Kit (Figure 6-3) as standard, it delivers dependable energy storage, ensuring extended usage and optimal performance for off-grid adventures. For those seeking enhanced power capacity, the optional 1080-Amp Hour “Max Power” Battle Born Lithium-Ion Battery Kit provides an upgraded solution, allowing for increased energy availability and longer operating times. Both battery kits feature advanced lithium-ion technology, offering superior longevity, faster charging, and consistent power delivery, making the GT Series a top-tier choice for travelers who require robust and efficient energy systems.
Proper battery maintenance is essential for ensuring longevity, efficiency, and safety. Here are key steps to maintain the Battle Born Lithium-Ion Battery Kits used in the Tiffin GT Series:
1. Regular Charging – Keep the batteries charged within their recommended range. Avoid letting them fully discharge for extended periods, as this can affect performance.
2. Temperature Management – Lithium-ion batteries perform best in moderate temperatures. Protect them from extreme heat or cold, as excessive temperatures can degrade battery life.
3. Proper Storage – If storing for an extended period, ensure batteries are charged to around 50% and kept in a cool, dry place. Disconnect any unnecessary loads to prevent gradual drain.
4. Avoid Overloading – Do not exceed the power capacity of your battery system. Check that all connected devices operate within the battery’s specifications.
5. Routine Inspections – Periodically check cables, connections, and terminals for signs of corrosion, loose connections, or damage. Address any issues promptly to prevent performance loss.
By following these steps, you’ll ensure that your battery system remains reliable and efficient for your travels.
Inverter:
The Tiffin GT Series Van is engineered for adventure, and its electrical system is powered by the Xantrex Freedom XC 3000 Pure Sine Wave Inverter/Charger (Figure 6-4). This advanced inverter delivers clean, stable AC power for sensitive electronics and appliances, while its integrated charger ensures efficient battery management for extended off-grid capability.
To keep your Tiffin GT Series Van’s electrical system performing at its best:
1. Regular Inspection
Check inverter and cabling for dust, corrosion, and loose connections.
2. Cooling System Care
Ensure ventilation openings are clear; clean fans periodically to prevent overheating.
3. Battery Health
Monitor voltage and charging cycles. Follow manufacturer guidelines for lithium or AGM batteries.
4. Firmware Updates
Update via the Xantrex app to maintain compatibility and performance.
5. Load Management
Avoid exceeding the inverter’s 3,000 W continuous rating to prevent overload.
6. Environmental Protection
Keep the inverter in a dry, ventilated space away from moisture and extreme heat.
7. Periodic Testing
Test inverter and charger functions regularly to confirm proper operation.
Safety Precautions
• Disconnect all AC/DC power before servicing.
• Use only approved cables and fuses.
• Do not block ventilation or expose the inverter to water.
Battery Disconnect Switch:
The master battery disconnect switch (Figure 6-5) is strategically positioned at the rear of the GT Series on the passenger’s side, serving as a critical component in managing the vehicle’s electrical power. When set to the “OFF” position, this switch prevents the batteries from receiving any charge from the 30A shore power connection. This isolation ensures that onboard electrical components do not inadvertently drain the battery when external power is unavailable. However, an exception to this disconnection is the auxiliary alternator charge, which remains active while the vehicle is running. This design helps maintain battery charge without interruption during transit, providing reliability and efficiency for continuous power needs.
120 – VOLT AC (VAC) Receptacles:
Your Tiffin GT Series is equipped with several 120 VAC receptacles (Figure 6-6) located throughout the interior of the Van.
These 120 VAC receptacles are of the “three-prong” variety; the third prong being a grounding pin which provides adequate grounding to protect one from any electrical shock.
For these receptacles to work properly, do not use an adapter, cheater, or extension cord which defeats the function of the grounding pin. For the same reason, never remove or bend away the ground prong or pin from any three-prong AC plug so that it would fit a two-prong AC receptacle (i.e., an ungrounded AC receptacle).
Never operate the Tiffin Van if there is an electrical short present, as an electrical short may deliver an electrical shock to anyone coming in contact with the exterior of the unit.
Ground Fault Circuit Interrupt (GFCI) Receptacles:
The Tiffin Van has 120 VAC GFCI receptacles (Figure 6-7), which provide greater protection against inadvertent electrical shocks. These specialized GFCI receptacles provide both overload and short-circuit protection for the user.
All GFCI-protected receptacles are marked as such, but only one of them may have two pushbuttons on the receptacle (as shown in the picture). The upper pushbutton is a “test” button which can be used to assure that the GFCI function is working—to test this function push that upper button: There will be a momentary “click” and the circuit will be disconnected (i.e., no power is available at the GFCI-protected receptacles). To reset this GFCI breaker, push the lower button (the “reset”)
These receptacles protect the user from ground faults between an electrically “hot” wire and ground. The GFCI will not reduce the shock hazard if the short is between a neutral and “hot” wire, or two “hot load” wires. The GFCI should be tested at least once a month. The 120 VAC electrical system must be “on” for the GFCI to be tested. To test the GFCI the reset button needs to be pushed in fully before starting the test. Push the test button; this will cause the reset button to pop out which means that the protected circuits have been disconnected. Push the reset button back in until a “click” is heard—this will re-activate the protected circuit. If the GFCI is working properly, the reset button will remain in the “in” position.
Circuit Breakers:
The circuit breakers and fuses are installed to protect the electrical system of the Tiffin GT Series from any overloads. Do not attempt to change the electrical circuitry or to add appliances yourself.
Please consult an authorized Tiffin GT Series dealership to determine whether any changes you desire are appropriate and acceptable. Tiffin qualified staff of electricians can readily determine whether any changes sought (e.g. solar, radio, amateur radio, satellite television receiver, personal computer system, and the like) are possible or not and can advise you on how best to realize these enhancements.
The circuit breakers are housed within the primary 120 VAC distribution load center (Figure 6-8), located on the base of the driver’s side ottoman (Figure 6-9), ensuring accessible and organized power management. It is neatly concealed behind a flip-down door, ensuring a streamlined and organized appearance while allowing for quick maintenance and adjustments when needed. This thoughtful placement enhances functionality while preserving the sleek interior design of the Tiffin GT Series, making it simple to manage electrical distribution without compromising aesthetics or convenience.
The panel has a main 30amp breaker which turns off all incoming power to the panel’s branch breakers. All branch breakers are labeled as to their function.
Tank Heat Switch:
The Tiffin GT Series is equipped with a tank heat switch that is conveniently located on the home page of the Spyder Multiplex system (Figure 6-10). This placement allows for easy access and seamless operation, enabling users to quickly activate the heating feature when needed. Integrated within the intuitive Spyder Multiplex interface, the tank heat switch ensures efficient temperature regulation, enhancing comfort and protection for essential systems in various weather conditions.
The tank heat switch disables power to the thermostat that controls the holding tank heat pads, preventing them from activating when the pad temperature reaches freezing levels. By shutting off this power, users can effectively manage energy consumption while ensuring the RV remains well-prepared for extended storage in cold environments. The ability to control tank heating is especially useful in situations where external temperatures are expected to stay below freezing for prolonged periods, allowing users to prevent unnecessary power drain while still safeguarding their plumbing systems.
