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ARCO Zeus Bluetooth Regulator Settings Manual

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Welcome to the Settings Manual for the ARCO Zeus Bluetooth Regulator. This document is intended to provide clear and concise instructions on settings available in the regulator. Whether you're an experienced technician or new to our systems, this guide will help you understand the features and functionality of the regulator, ensuring optimal performance and reliability. Our goal is to equip you with the knowledge necessary to integrate and manage the external alternator regulator with ease, enabling smooth and efficient operation of your power system.

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Battery Settings⁠

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Alternator Settings⁠

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Charge Profile Settings⁠

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Regulator Settings⁠

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Operating Modes⁠

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Sync Modes⁠

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Status LED⁠

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Charging States⁠

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Charging Logic⁠

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Wiring Diagrams⁠

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Battery

Battery

Setting Name

Description

Nominal Voltage

The voltage of the battery bank being charged. Set this to the nominal voltage of your system (12, 24, 36 or 48).

Amp Hours

The total capacity for the battery bank being charged. Ex: if you have two 100aH batteries in parallel, then 2 x 100ah = 200aH. Minimum is 10, Maximum is 10,000.

Max Charge Current

The max current your battery bank can accept

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. When the battery bank capacity is greater than the maximum output of the alternator, set this value to the alternator’s max output current. Ex: if your total capacity is 400A, and your alternator is rated for 200A, then set this value to 200A. Minimum is 5, Maximum is 500.

Temp Sensor Enabled

The Battery Temp sensor is not required therefore it is a selectable option. If you are not going to connect a Temp Sensor for the battery, be sure to disable this feature.

Minimum Temp

If the temp sensor is enabled and the battery temperature is below this value, charging will be disabled. Minimum is -20°C (-4°F), Maximum is 30°C (86°F).

Maximum Temp

If the temp sensor is enabled, as the battery nears this value the regulator will reduce the charging current in an effort to cool down the pack. If the battery gets above this value, then the regulator will disable charging. Minimum is 0°C (32°F), Maximum is 125°C (257°F).

Minimum Voltage

The absolute minimum safe voltage for the battery bank. If the battery falls below this value the regulator will go Fault.

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Maximum Voltage

The absolute maximum safe voltage for the battery bank. If the battery gets above this value, then the regulator will disable charging. This value is typically set 0.2V above the Absorption Target Voltage (see Charge Profile section).

Shunt Offset Scale

Use this value to adjust the measured amps so that it matches an external measurement device. This number should be at the default of 1.0 for most applications.

Shunt Rated Amps

The rated current of the shunt being used to monitor the battery bank. Minimum acceptable rating is 100A, Maximum is 1500A.

Shunt Rated mV

The rated sensitivity (in mV) of the shunt being used to monitor the battery bank. Typical shunts are 50mV. Minimum acceptable is 10mV, Maximum is 150mV.

Shunt Reversed

Gives the ability to reverse the shunt readings in case the leads are connected to the shunt in the reverse order.

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Alternator

Alternator

Setting Name

Description

Alternator Type

P-Type connects the field to positive, while N-Type connects the field to ground. Refer to your alternator’s manual if you are unsure. *All ARCO Alternators are P-Type.

Alternator Thermistor

Currently only supports the ‘ARCO’ option. ‘Other’ may be used in future releases.

Tach Poles

The number of poles on the alternator, which determines the number of stator/tachometer pulses per revolution. Refer to your alternator’s manual if you are unsure. Minimum is 2, Maximum is 24. *All ARCO Alternators have 16 poles.

Drive Ratio

Alternator revolutions per engine revolution, which is used to calculate the engine rpm. To calculate, measure the main drive pulley’s diameter on your engine and divide it by the diameter of the alternator’s pulley. Ex: 125mm Drive pulley diameter divided by 50mm Alternator pulley diameter is a drive ratio of 2.5. Minimum is 0, Maximum is 10.

Startup Delay (s)

A delay after engine startup before the regulator begins ramping up the charge output of the alternator (in seconds). Minimum is 0, Maximum is 600.

Ramp to Bulk (s)

After the Startup Delay has elapsed, this is the time taken for the regulator to increase from the Duty Minimum (%) to the Duty Maximum (%) in seconds. Minimum is 15, Maximum is 600.

Max Operating Temp

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The temperature at which the alternator is specifies to run continuously; a reading of a few degrees higher is considered normal. When the alternator gets to within 10°C (18°F) of this value, the regulator will decrease the output (duty %) in an effort to cool down the alternator. The regulator’s objective is to keep the alternator at this value in lieu of a constant current output. This value shall be greater than or equal to 10°C (18°F) below the Max Absolute Temp value. The operating mode will change to "Temperature Compensation" if the regulator has prioritized the temperature of the alternator versus a constant current output.

Max Absolute Temp

If through the regulator’s effort to cool down the alternator by decreasing the output (duty %) and steady state charging at the Max Operating Temp, then the regulator will disable charging at this value. The regulator will go to Fault and display the message "Alt Temp High". * ARCO recommends setting this value to 10°C (18°F) below the manufacturer’s recommendation. *

Min Engine RPM

The minimum engine RPM that charging is allowed. This will also be the minimum value on the X-Axis of the RPM Limits curve graph. Ex: if your engine idles at 750, but you don’t want to generate power until 1200 rpm, set this value to 1200. The message "Minimum RPM Not Reached" will be displayed in the app until this value is exceeded. * Tach Required must be enabled for this parameter to be used. *

Max Engine RPM

Your engine's maximum rpm . This affects the range of the user-definable RPM Limits Curve. Charging above this limit is not restricted, as this is used to set the data points on the RPM limits curve.

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RPM Limits Curve

Allows you to customize the maximum duty that the regulator can apply to the alternator for the given rpm. Very useful in smaller engine marine applications and rv’s in hilly terrain.

Duty Minimum (%)

The minimum field output, usually set to zero. If ‘Tachometer Required’ is enabled, then this value needs to be set so the regulator can apply a small voltage to the alternator which allows for a stator signal output (used to compute RPM data), but not large enough to generate a charge. For ARCO Alternators this value is typically 5%, adjust in +/- 1% increments for fine tuning.

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Duty Maximum (%)

The maximum field output that the regulator can apply to your alternator. For Alternators that run at source voltage, this value is typically set to 100%. If your alternator does not, then you will need to adjust this value. Ex: if you have a 48v battery bank but your 48v alternator requires a 12v field control. To determine this value, divide the max field input as defined by your alternator’s manual (typically around 13.5v) by the max voltage of the battery bank (58.2v) which equals 0.23 or 23%. All ARCO Alternators use the rated output voltage on their field input. For 12v and 24v models, a maximum of 100% can be used. For the 48v models, a maximum of 80% shall be used. This reduces rapid heat generation and maintains a steady high output rate. For non-ARCO alternators, be sure to verify the rotor voltage of your device to ensure you do not damage it by applying a rotor voltage that is too high and out of spec.

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Enable Alt Shunt

An alternator shunt is not required for charging by default. However, it does provide the voltage and current output of the alternator in the app and is REQUIRED for Victron DVCC.

Alt Shunt Reversed

Gives the ability to reverse the shunt readings in case the leads are connected to the shunt in the reverse order.

Alt Shunt Scale

Use this value to adjust the measured amps so that it matches an external measurement device. The default of 1.0 is used for most applications.

Alt Max Output Current (A)

The maximum desired current output of the alternator. The controlling parameter for current output is the lesser value of this and the "Max Charge Current" (see Battery section). Ex: If the Battery Max Charge Current is set to 200A and this value is set to 275, with no loads on the system the 200A Max Charge Current will be the Target Current. Another example is if your system has a Max Charge Current of 450A and this value is set to 275, then the Alt Max Output Current of 275A is the Target Current.

Alt Shunt mV

The rated sensitivity (in mV) of the shunt being used to monitor the battery bank. Typical shunts are 50mV. Minimum acceptable is 10mV, Maximum is 150mV.

Alt Shunt Amps

The rated current of the shunt being used to monitor the battery bank. Minimum acceptable rating is 100A, Maximum is 1500A.

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Charge Profile

Charge Profile

Setting Name

Description

Absorption Voltage

The target voltage to transition from bulk to absorption charging. This value is also the target to maintain during absorption charging. Min and Max values depend on the Nominal Voltage as set in the Battery section.

Abs. Exit Current (%)

After the Absorption Voltage is reached, the regulator will exit the absorption stage when the total current flow into the battery bank is below this value. This value is expressed as a percentage of the ‘Amp Hours’ value set in the Battery section. Ex: with the same 200aH bank, if this value is set to 3.0%, then the regulator would exit absorption when the total current flow reaches 6 amps (200aH x 0.03 = 6).

Enable Absorption Exit Time

Allows the absorption stage to exit after a set period of time, or until the Abs. Exit Current is reached. This makes exiting the Absorption stage a two-factor process. Both parameters do not need to be reached, if either the set time period has elapsed or the Abs. Exit Current (%) has been reached, then the Absorption Stage is exited.

Abs. Exit Time (min)

Time in minutes that the absorption stage will be held for.

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Enable Topoff Charge

After absorption charging is complete, perform a topoff charge (this is very uncommon and should only be enabled by expert users).

Topoff Target Voltage

Target voltage to hold during Topoff charging.

Enable Topoff Exit Time

Enables/Disables the Topoff Exit Time field.

Topoff Exit Time (min)

The time period in minutes that this stage will be exited regardless of whether the target voltage has been achieved.

Enable Topoff Exit Current

Enables/Disables the Topoff Exit Current field.

Topoff Exit Current (%)

After the Topoff Target Voltage is achieved, the regulator will exit the Topoff stage when the charge current is below this value. This value is expressed as a percentage of the ‘Amp Hours’ value set in the Battery section (see Abs. Exit Current under Charge Profile for example calculation).

Enable Topoff Target Current

Enables/Disables the Topoff Target Current field.

Topoff Target Current

The target current to maintain.

Float Target Voltage

The target voltage to maintain during the Float stage. Min and Max values depend on the Nominal Voltage as set in the Battery section.

Float Exit Current (%)

While in the Float stage, the regulator will return to bulk charging if the battery bank is discharging at a rate greater than this value (expressed as a percentage of the ‘Amp Hours’ value set in the Battery section). Ex: with the same 200aH bank, if this value is set to -5.0, then the regulator would exit float and return to bulk when the bank has a total discharging current flow of -10 amps (200aH x -0.05 = -10) or more.

Float Exit Voltage

The minimum voltage before the regulator exits float and returns to bulk. Min and Max values depend on the Nominal Voltage as set in the Battery section.

Enable Float Exit SoC (%)

Enables/Disables the Float Exit SoC field.

Float Exit SoC (%)

The State-of-Charge at which the regulator will exit float and return to bulk. If the system has small loads that do not exceed the Float Exit Current (%) as set above, this will kick the system back to Bulk Charging and keep the batteries from reaching their shutoff State-of-Charge.

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Regulator

Regulator

Setting Name

Description

Name

A customizable field for regulator name changes.

A custom pin that can be configured once the regulator is installed and set up. *ARCO recommends you change the pin to a unique number for safety and security.*

Bat Instance ID

When the regulator transmits battery information over the CAN bus, it will use this identifier. Available range is 0 to 251.

Engine Instance ID

When the regulator transmits engine information over the CAN bus, it will use this identifier. Available range is 0 to 251.

Charger Instance ID

When the regulator transmits charger information over the CAN bus, it will use this identifier. Available range is 0 to 251.

Enable NMEA 2000 Battery Message

Enables/Disables the transmission of PGN 127506 and 127508 from the regulator over the CAN bus.

Enable NMEA 2000 Engine Message

Enables/Disables the transmission of PGN 127488 from the regulator over CAN bus.

Enable NMEA 2000 Charger Message

Enables/Disables the transmission of PGN 127750 and 127751 from the regulator over the CAN bus.

Enable RV-C Battery Message

Enables/Disables the transmission of DGN 0x1FFFD and 0x1FFFC from the regulator over CAN bus.

Enable RV-C Engine Message

Enables/Disables the transmission of DGN 0x1FFF4 (rpm only) from the regulator over CAN bus.

Enable RV-C Charger Message

Enables/Disables the transmission of DGN 0x1FFC7 and 0x1FEA3 from the regulator over CAN bus.

Tachometer Required

If enabled, charging will not begin until a tachometer signal is received from the alternator. Enabling this feature will require setting a minimum duty to a value greater than 0%. Refer to ‘Duty Minimum’ in the Alternator section. * This is a safety feature that helps prevent field current being applied to the alternator in situations when the alternator is not spinning (thrown belt, etc.). *

ATC Input

Enables/Disables the optional input monitoring of a charge control signal from a BMS. This line must be pulled HIGH by the BMS to allow the regulator to charge, and LOW to disable charging.

Feature Out

This output can be configured to activate based on one of four optional values going outside their set parameters: Warning Lamp, Alternator Temp, Battery Temp or Fault. This output can support up to a 60W load.

Feature In 01

This input can be configured to activate one of three charge modes: Force to Float, Half Power, Generator Mode. This input must be pulled LOW to activate. DO NOT connect this input to a positive voltage.

Feature In 02

Sync Mode

Battery Voltage Sense Active

For Smart system integrations that utilize CAN Bus data transmission, select the data source that your regulator will be getting the battery data from.

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[AS1]

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If a Sync Mode that utilizes CAN Bus is selected, then this option will be displayed as a toggle button. If the toggle button is active, the regulator will read the battery measured voltage directly from the harness voltage sense lines at 10Hz and use this value in place of the measured voltage received over the CAN Bus. This is an option for users who wish to communicate with their batteries via CAN, but without limitations due to data rate. *This feature is available for Zeus firmware 1.30 and above.

CAN Address

The initial CAN address that the regulator will start with. It is normal if this number changes on its own, as the regulator will auto negotiate this address with other devices on the network if necessary. The default address is 143.

CAN Priority

The device priority on the CAN bus. A higher number means a higher priority (priority should be given to more efficient devices). The default value is 70.

Restore Defaults

Will restore the default values to all parameter fields of the regulator.

Version

Shows the current firmware version installed on the device.

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Operating Modes

Operating Modes

Setting Name

Description

Automatic Charging

The regulator will begin charging when an ignition signal is detected and will progress through the three stages (bulk, absorption, float) as defined by their parameters.

Skip to Bulk

Leaves the current mode and goes straight to Bulk. Transitions to Absorption and Float normally.

Skip to Float

Leaves the current mode and goes straight to Float. Transitions back to Bulk if either the Float Exit SoC or Float Exit Current (%) conditions are met.

Hold Float Forever

Keeps the regulator in Float mode until the mode is manually changed to one of the options outlined here. Float does not typically provide a charge to the battery bank, so this feature acts as a “stop charge” option.

Hold Standby Forever

All regulators come from ARCO in this mode by default and will not charge regardless of whether an ignition signal or any other indicator to charge are present. The mode is changed to “Automatic Charging” upon completion of the setup wizard in the Arco App, or by entering charge settings yourself and then manually changing the mode via the Control Panel.

Configure Generator Mode

When this mode is enabled, the regulator will override any RPM Limitation (as defined by the rpm limits curve) and take the field to 100% duty. If the engine RPM varies by +/-200 from where it was enabled, the regulator will exit this mode and return to “Automatic Charging”. This mode can only be enabled while the engine is running. Ex: engine rpm is 850 and the field is limited to 35% duty based on the rpm limits curve. When enabled, the field is driven to 100% duty to maximize the alternator's output. If the engine rpm changes +/-200 from 850 (below 650 or above 1050), the regulator will revert to automatic charging and follow the limitations of the rpm limits curve.

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Sync Modes

NOTE: When the sync-mode is disabled, the regulator will read the shunts and voltages directly via the dedicated harness wires. These readings are done at a rate of 10Hz (every 0.1 seconds) and provide quick charging adjustments when compared to the data update rates of CAN Bus messages. When utilizing a CAN Bus system, make note of the data update rate, as this directly affects the performance of the regulator. The slower the update rate is, the greater the lag in response to changes there will be. For the best charging experience and most responsive charging, we recommend utilizing the regulator to monitor and measure the system directly.

Victron GX (N2K)

In Victron GX (N2K) mode a Victron GX device is required, as the regulator depends on System Battery message for the battery information (measured voltage and current). This data is transmitted from the GX at a rate of 0.66Hz (every 1.5 seconds) at 250 kbit/s baud rate. Currently the battery temperature is not transmitted and will show a ‘0’ in the Zeus App. If a Lynx BMS is installed in the system, the regulator will listen to and follow any Allow-To-Charge (ATC) and Status messages that are transmitted over the CAN Bus. It is also recommended to connect the regulator’s ATC signal line to the ATC relay on the Lynx BMS as an added safety feature in case of a stop charge event. With this line connected, enabling of the ATC input signal in the Zeus App is also necessary. If you do not have a Lynx BMS in your system, there is no ATC CAN Bus message support. If the bms is going to do a disconnect for any reason, the regulator does not get any advanced warning and will not be able to power down the alternator in time.

Lithionics

In Lithionics mode the regulator will receive all the charge parameters, measured values and ATC commands over the CAN Bus. These values include, measured voltage and current, target voltage and current, battery temperature and desired charge state (Charge/Don’t Charge). This data is transmitted from the batteries at a rate of 2Hz (every 0.5 seconds) at 250 kbit/s baud rate. You will need to set the Battery Instance ID of the battery you are charging per the RV-C Spec (0-Invalid, 1-Main House Battery, 2-Chassis Start Battery, 3-Secondary House Battery, 4-Generator Starter Battery, 5 to 250-Reserved). The regulator will perform aggregation for systems with multiple battery/bms systems. The BMS Instance must be set to 10 + the Base ID. For example, an aggregated house bank with 3 batteries would be instanced 1-primary, 11-second battery, 12-third battery.

AE Bus

In AE Bus mode the regulator will receive all the charge parameters, measured values and ATC command over the CAN Bus. These values include, measured voltage and current, target voltage and current, battery temperature and state of charge. This data is transmitted from the batteries at a rate of 4Hz (every 0.25 seconds) at 250 kbit/s baud rate. The regulator currently does not perform aggregation in this mode.

Lynk Bus

In Lynk Bus mode the regulator will receive all the charge parameters, measured values and alarm messages over the CAN Bus. These values include, measured voltage and current, target voltage and current, battery temperature and state of charge. This data is transmitted from the batteries at a rate of 4Hz (every 0.25 seconds) at 500 kbit/s baud rate. The regulator currently does not perform aggregation internally. In this mode, the batteries do not send a dedicated ATC command to the regulator. If the bms is going to do a disconnect for any reason, the regulator does not get any advanced warning and will not be able to power down the alternator in time.

REC

In REC mode the regulator will receive all the charge parameters, and measured values over the CAN Bus. These values include, measured voltage and current, target voltage and current, battery temperature and state of charge. This data is transmitted from the batteries at a rate of 4Hz (every 0.25 seconds) at 500 kbit/s baud rate. The regulator currently does not perform aggregation internally in this mode. In this mode, the batteries do not send a dedicated ATC command to the regulator. If the bms is going to do a disconnect for any reason, the regulator does not get any advanced warning and will not be able to power down the alternator in time.

EcoFlow Hub V2

In EcoFlow mode the regulator will receive all the charge parameters, measured values and ATC commands over the CAN Bus. These values include, measured voltage and current, target voltage and current, battery temperature and desired charge state. This data is transmitted from the batteries at a rate of 2Hz (every 0.5 seconds) at 250 kbit/s baud rate. Note: The EcoFlow PowerHub will not allow you to power down the system if a charge is being applied. The ignition signal must be removed (engine turned off) which will stop the regulator’s charging, and then you can power down the EcoFlow system.

Expion (500k)

In Expion (500k) mode the regulator will receive all the charge parameters, measured values and alarms messages over the CAN Bus. These values include, measured voltage and current, target voltage and current, battery temperature and state of charge. This data is transmitted from the batteries at a rate of 4Hz (every 0.25 seconds) at 500 kbit/s baud rate. The regulator currently does not perform aggregation internally in this mode. In this mode, the batteries do not send a dedicated ATC command to the regulator. If the bms is going to do a disconnect for any reason, the regulator does not get any advanced warning and will not be able to power down the alternator in time.

Renogy

In Renogy mode the regulator will receive all the charge parameters, measured values and ATC commands over the CAN Bus. These values include, measured voltage and current, target voltage and current, battery temperature and desired charge state. This data is transmitted from the batteries at a rate of 2Hz (every 0.5 seconds) at 250 kbit/s baud rate. You will need to set the Battery Instance ID of the battery you are charging per the RV-C Spec (0-Invalid, 1-Main House Battery, 2-Chassis Start Battery, 3-Secondary House Battery, 4-Generator Starter Battery, 5 to 250-Reserved). The regulator will perform aggregation for systems with multiple battery/bms systems. The BMS Instance must be set to 10 + the Base ID. For example, an aggregated house bank with 3 batteries would be instanced 1-primary, 11-second battery, 12-third battery.

Epoch V2

In Epoch V2 mode the regulator will receive all the charge parameters, measured values and alarm messages over the CAN Bus. These values include, measured voltage and current, target voltage and current, battery temperature and state of charge. This data is transmitted from the batteries at a rate of 4Hz (every 0.25 seconds) at 500 kbit/s baud rate. The regulator currently does not perform aggregation internally in this mode. In this mode, the batteries do not send a dedicated ATC command to the regulator. If the bms is going to do a disconnect for any reason, the regulator does not get any advanced warning and will not be able to power down the alternator in time.

Go Power

In GoPower mode the regulator will receive all the charge parameters, measured values and ATC commands over the CAN Bus. These values include, measured voltage and current, target voltage and current, battery temperature and desired charge state. This data is transmitted from the batteries at a rate of 2Hz (every 0.5 seconds) at 250 kbit/s baud rate. You will need to set the Battery Instance ID of the battery you are charging per the RV-C Spec (0-Invalid, 1-Main House Battery, 2-Chassis Start Battery, 3-Secondary House Battery, 4-Generator Starter Battery, 5 to 250-Reserved). The regulator will perform aggregation for systems with multiple battery/bms systems. The BMS Instance must be set to 10 + the Base ID. For example, an aggregated house bank with 3 batteries would be instanced 1-primary, 11-second battery, 12-third battery.

CZone

In CZone mode the regulator will receive battery measured values and ATC commands over the CAN Bus. These values include battery measured voltage, current, and temperature. This data is transmitted at a rate of 0.66Hz (every 1.5 seconds) at 250 kbit/s baud rate. Target current and voltage are not transmitted, and the regulator will use the app settings values (absorption/float voltage and max charge current) as the charging target parameters. You will need to set the Battery Instance ID to match the master battery ID as configured using the CZone Configuration Tool for proper CAN communication. If the regulator receives a ‘Do Not Charge’ command from the battery over CAN Bus, it will display ‘Leader Commanded Ignition Disabled’ message in the Zeus app.

Victron GX (RV-C)

In Victron GX (RV-C) mode a Victron GX device is required, as the regulator depends on System Battery message for the battery information. The regulator will receive battery measured values and target voltage and current over the CAN Bus. These values include, measured voltage, current, and temperature. This data is transmitted from the Victron GX device at a rate of 2Hz (every 0.5 seconds) at 250 kbit/s baud rate. You will need to set the Battery Instance ID of the battery you are charging per the RV-C Spec (0-Invalid, 1-Main House Battery, 2-Chassis Start Battery, 3-Secondary House Battery, 4-Generator Starter Battery, 5 to 250-Reserved). The regulator will perform aggregation for systems with multiple battery/bms systems. The BMS Instance must be set to 10 + the Base ID. For example, an aggregated house bank with 3 batteries would be instanced 1-primary, 11-second battery, 12-third battery. In this mode, the regulator will not receive a dedicated ATC command. If the bms is going to do a disconnect for any reason, the regulator does not get any advanced warning and will not be able to power down the alternator in time.

Expion (250k)

In Expion (250k) mode the regulator will receive all the charge parameters, measured values and alarms messages over the CAN Bus. These values include, measured voltage and current, target voltage and current, battery temperature and state of charge. This data is transmitted from the batteries at a rate of 4Hz (every 0.25 seconds) at 250 kbit/s baud rate. The regulator currently does not perform aggregation internally in this mode. In this mode, the batteries do not send a dedicated ATC command to the regulator. If the bms is going to do a disconnect for any reason, the regulator does not get any advanced warning and will not be able to power down the alternator in time.

Status LED

The regulator will blink on a repeating 6 second pattern. The following sequences are options to be shown.

Single Blue: The regulator is connected to a Bluetooth device, i.e. a phone. (1x 1 second pulse)

Double Red: An error is present. Open the app for further information. (2x 1 second pulses)

Single Green: The regulator is in Standby; no charging. (1x 1 second pulse)

Long Green: The regulator is in Bulk Charging. (1x 5 second pulse)

Double Green: The regulator is in Float Charging. (2x one second pulses)

Charging States (Data Logs)

0: Standby Waiting for Ignition signal 1: Startup Waiting for all conditions to be met, then allow charging 2: Bulk Charge at max current as set by user after a delay and a soft ramp up 3: Absorption Hold a charging voltage as current tapers off 4: Top Off ‘Top off' the battery with low current (~0.2V above BULK) 5: Float Maintain house loads, if a large load turns on return to bulk 6: Equalize Can be triggered by feature-in 7: Limp Mode Go to limp mode because of a fault (Not used as of Firmware Version 1.27) 8: Fault Sets duty to zero because of a fault (No Charging) 9: CCCV Constant current and voltage due to external control (CAN Bus)

Charging Logic (Data Logs)

0: ATC Disable 1: No Tach 2: Startup Delay 3: Soft Ramp 4: Control Voltage 5: Control Current 6: Half Current 7: Temperature Control 8: Alt Temp Low 9: Alt Temp High 10: Battery Temp Low 11: Battery Temp High 12: Minimum Duty

13: Maximum Duty 14: Hold Standby 15: RPM Pullback 16: Fault – Battery Voltage 17: Fault – Alternator Temp Sensor 18: Fault – Battery Temp Sensor 19: Fault – Battery Shunt Open 20: Fault – Internal Overheat 21: Fault – Internal Sensor 22: Master Commanded Standby 23: Balancing Load 24: Minimum RPM