Bluesky SOLAR BOOST 1524iX User manual

SOLAR BOOST™ 1524iX
15 AMP 24VDC / 20 AMP 12VDC MAXIMUM POWER POINT TRACKING
PHOTOVOLTAIC CHARGE CONTROLLER
INSTALLATION AND OPERATION
MANUAL
THIS MANUAL INCLUDES IMPORTANT SAFETY INSTRUCTIONS FOR MODEL SB1524iX
SAVE THESE INSTRUCTIONS
COVERED UNDER ONE OR MORE OF THE FOLLOWING US PATENTS
6,111,391 •6,204,645
© Blue Sky Energy, Inc. 2011 430-0029 B

Blue Sky Energy - Solar Boost 1524iX
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TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS................................................................................................................................ 2
PRODUCT DESCRIPTION...................................................................................................................................................... 3
Features Omitted in the Solar Boost 1524i ............................................................................................................ 3
Part Numbers and Options..................................................................................................................................... 3
OPERATION ......................................................................................................................................................................... 3
Charge Status Indicator.......................................................................................................................................... 3
Auxiliary Output Indicator ....................................................................................................................................... 3
Optional Remote Displays...................................................................................................................................... 3
Three Stage Charge Control .................................................................................................................................. 3
Bulk Charge ................................................................................................................................... 3
Acceptance Charge........................................................................................................................ 4
Float Charge .................................................................................................................................. ..4
Two Stage Charge Control..................................................................................................................................... 4
Equalization............................................................................................................................................................ 4
Current Limit........................................................................................................................................................... 4
Optional Temperature Compensation .................................................................................................................... 5
Maximum Setpoint Voltage Limit............................................................................................................................ 5
Maximum Power Point Tracking (MPPT) ............................................................................................................... 5
Panel Temperature and Output Power................................................................................................................... 5
Multiple Charge Controllers On The IPN Network.................................................................................................. 5
INSTALLATION....................................................................................................................................................................... 5
Electrostatic Handling Precautions......................................................................................................................... 6
Battery and PV Voltage.......................................................................................................................................... 6
Selecting PV Modules ............................................................................................................................................ 6
As Shipped Factory Default Settings...................................................................................................................... 6
Equalize Enable ..................................................................................................................................................... 6
Battery Temperature Sensor.................................................................................................................................. 6
Battery and PV Wiring............................................................................................................................................ 7
Auxiliary Output....................................................................................................................................................... 7
Auxiliary Battery Charge ................................................................................................................ 8
Load Controller............................................................................................................................... 8
Dusk-to-Dawn Lighting Control ...................................................................................................... 8
Installing a Multi-Controller System........................................................................................................................ 8
IPN Network Address..................................................................................................................... 9
Mounting................................................................................................................................................................. 9
TROUBLESHOOTING GUIDE................................................................................................................................................10
SPECIFICATIONS...................................................................................................................................................................11
ONE YEAR LIMITED WARRANTY.........................................................................................................................................11
TABLES AND FIGURES
Table 1 Charge Status Indicator ................................................................................................................. 3
Table 2 Maximum Conductor Length - 3% Voltage Drop..............................................................................7
Figure 1 Front Panel Indicators.................................................................................................................... 4
Figure 2 Factory Charge Voltage Setpoint -vs.- Battery Temperature......................................................... 5
Figure 3 Setup and Wiring Diagram............................................................................................................. 7
Figure 4 Auxiliary Output Wiring................................................................................................................... 8
Figure 5 IPN Network Wiring........................................................................................................................ 9
Figure 6 Detailed Dimensional Drawing....................................................................................................... 9

Installation and Operation Manual
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IMPORTANT SAFETY INSTRUCTIONS
This manual contains important instructions for Model SB1524iX
SAVE THESE INSTRUCTIONS
1. Refer installation and servicing to qualified service personnel. High voltage is present inside unit. Incorrect installation or use may result in risk of electric shock
or fire. No user serviceable parts in this unit.
2. To reduce the risk of electric shock, fire or personal injury, the following symbols are placed throughout this manual to indicate dangerous conditions, or
important safety or operational instructions.
WARNING CAUTION IMPORTANT
)
Indicates dangerous conditions or electric
shock potential. Use extreme caution.
Indicates items critical to safe installation or
operation of the unit.
Follow these instructions closely for proper
operation of the unit
3. PERSONAL PRECAUTIONS
a) Working in the vicinity of lead-acid batteries is dangerous. Batteries produce explosive gasses during normal operation.
b) To reduce risk of battery explosion, follow these instructions and those published by battery manufacturer and manufacturer of any equipment you intend
to use in vicinity of battery.
c) Someone should be within range of your voice or close enough to come to your aid when you work near a lead-acid battery.
d) Have plenty of fresh water and soap nearby in case battery acid contacts skin, clothing or eyes.
e) Wear complete eye protection and clothing protection. Avoid touching eyes while working near battery.
f) If battery acid contacts skin or clothing, wash immediately with soap and water. If acid enters eye, immediately flood eye with running cold water for at
least 15 minutes and get medical attention immediately.
g) NEVER SMOKE or allow a spark or flame in vicinity of battery.
h) Be extra cautious to reduce risk of dropping metal tool onto battery. It might spark or short circuit battery or other electrical part that may cause explosion.
i) Remove personal metal items such as rings, bracelets and watches when working with a lead-acid battery. A lead-acid battery can produce a short circuit
current high enough to weld a ring or the like to metal, causing a severe burn.
j) Remove all sources of power, photovoltaic and battery before servicing or installing.
4. CHARGER LOCATION & INSTALLATION
a) This unit is designed to charge 12V (6-cell) or 24V (12-cell) flooded or sealed type lead-acid chemistry batteries within the range of 10 to 5,000 amp-
hours. Follow battery manufacturers charging recommendations when considering this unit for use with other battery chemistry.
b) This unit employs components that tend to produce arcs or sparks. NEVER install in battery compartment or in the presence of explosive gases.
c) This unit must be installed and wired in accordance with National Electrical Code, ANSI/NFPA 70.
d) Over current protection for the battery must be provided externally. To reduce the risk of fire, connect to a circuit provided with 25 amperes maximum
branch-circuit over current protection in accordance with National Electrical Code, ANSI/NFPA 70.
e) Over current protection for the auxiliary load control output or auxiliary battery charge output must be provided externally. To reduce the risk of fire,
connect to load or auxiliary battery with 25 amperes maximum over current protection in accordance with National Electrical Code, ANSI/NFPA 70.
f) Insure that unit is properly configured for the battery being charged.
g) This unit is not water tight. Do not expose to rain, snow or excessive moisture.
h) Insure all terminating connections are clean and tight. Battery, PV and Auxiliary Output terminals are to be tightened to 9 in-lb (1 nm). IPN Network and
battery temperature sensor compression terminals are to be tightened to 2.1 in-lb (0.24 nm).
i) Do not connect to a PV array capable of producing greater than 16A short circuit current for 12V systems, or 12A short circuit for 24V systems. Limit
input short circuit current to 6A if the 24V input 12V output mode is used or 8A if the 18V input 12V output mode is used.
j) This unit is not provided with a GFDI (ground-fault detector/interrupter) device and must be used with an external GFDI device as required by Article 690
of National Electrical Code for the installation location.
5. PREPARING TO CHARGE
a) Never charge a frozen battery.
b) Be sure battery is mounted in a well ventilated compartment.
c) Add distilled water in each cell of a lead-acid battery until battery acid reaches level specified by battery manufacturer.

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PRODUCT DESCRIPTION
Solar Boost™ 1524iX is a 12V or 24V multi-stage Maximum Power Point Tracking (MPPT) photovoltaic battery charge controller capable delivering up
to 15 amps or 20 amps depending on PV modules and battery voltage. An auxiliary output can serve as either a 2A auxiliary battery charger, or as a load
controller with or without variable Dusk-to-Dawn lighting control. The 1524 includes an IPN Network interface which allows multiple charge controllers to
communicate with each other and operate as a single charging machine.
Through the use of patented MPPT technology the 1524 can increase charge current up to 30% or more compared to conventional controllers. The
1524’s sophisticated three stage charge control system improves battery performance and life while minimizing battery maintenance. The unit is fully
protected against voltage transients, over temperature, over current, reverse battery and reverse PV connections.
PART NUMBERS AND OPTIONS
•SB1524iX ...........Solar Boost 1524iX charge controller •IPNPRO-S .......... IPN-ProRemote with required 500A/50mV current shunt
•IPNPRO .............IPN-ProRemote display & battery monitor •IPNREM ............. IPN-Remote display
•CS-500 ...............500A/50mV current shunt •930-0039-01 ....... Deluxe mounting box, black powder coated
•930-0022-20 .......Battery temperature sensor
OPERATION
Charge control and MPPT operation are fully automatic. At night when PV power production stops, the PV array is disconnected from the battery to
prevent unwanted current drain eliminating the need for external blocking diodes. There is a 5 second turn-on delay, and a 45 second turn-off delay.
¾The 1524 operates on battery power, not PV power. A battery must be connected with a minimum voltage of 9V for the unit to
operate.
CHARGE STATUS INDICATOR
A charge status indicator is provided on the face of the 1524, and on the optional remote displays. If net battery charge current is greater than ≈3 to 5 amps
per 100 amp-hours of battery capacity the charge status indicator can provide a rough indication of battery state of charge.
CHARGE STATUS INDICATOR
CHARGE STATUS INDICATOR CHARGE MODE APPROXIMATE CHARGE LEVEL
OFF CHARGE OFF
CONTINUOUSLY ON BULK <70% FULL
BLINKING •1 SEC ON / 1 SEC OFF ACCEPTANCE 70% - 95% FULL
BLINKING •0.2 SEC ON / 1 SEC OFF FLOAT FULLY CHARGED
RAPID BLINKING •0.2 SEC ON / 0.2 SEC OFF EQUALIZE
TABLE 1
AUXILIARY OUTPUT INDICATOR
An Auxiliary Output indicator labeled LOAD is provided on the face of the 1524. The indicator will be ON when the auxiliary output is ON providing power to
a load, or charging an auxiliary battery. Auxiliary Output status can also be viewed on the IPN-ProRemote.
OPTIONAL REMOTE DISPLAYS
There are two available remote displays, the low cost IPN-Remote and the full featured IPN-ProRemote. The IPN-Remote is a basic 3-digit low power
LED type voltage, current and charge mode display without setup or control capability. The full featured IPN-ProRemote provides setup capability and
enhanced monitoring of charge controllers on the IPN network. It also provides a complete battery system monitor with various amp-hour counters and a highly
accurate “fuel gage” type battery level indicator.
THREE STAGE CHARGE CONTROL
The 1524 is factory configured for a three stage charging process, Bulk, Acceptance and Float. The three stage charge process provides a somewhat
higher charge voltage to charge the battery quickly and safely. Once the battery is fully charged a somewhat lower voltage is applied to maintain the battery
in a fully charged state without excessive water loss. Three stage charge improves battery performance and life while minimizing battery maintenance.
Bulk Charge
The 1524 will be in Bulk charge when battery voltage is below the Acceptance Charge Voltage setpoint. During Bulk the 1524 delivers as much charge
current as possible to rapidly recharge the battery and drive battery voltage up to the Acceptance Charge Voltage setpoint.
)

Installation and Operation Manual
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Acceptance Charge
When the battery recovers sufficient charge for battery voltage to rise to the Acceptance Charge Voltage setpoint (factory set to 14.2/28.4V) current is
reduced as necessary to hold the battery at the Acceptance Voltage. The 1524 remains in Acceptance until the battery is fully charged as determined by either;
1. The 1524 has remained in Acceptance continuously for the Charge Time period (factory set to 2 hours).
– OR –
2. With the IPN-ProRemote display, net battery charge current while in Acceptance decreases to the Float Transition Current setting (factory
set to 1.5A per 100 amp-hours of battery capacity).
Float Charge
Once the battery is fully charged a somewhat lower Float Voltage (factory set to 13.2/26.4V) is applied to maintain the battery in a fully charged state
without excessive water loss. During Float a healthy fully charged lead-acid battery will draw ≈0.1–0.2 amps per 100 amp-hours of battery capacity.
TWO STAGE CHARGE CONTROL
Certain battery types or system configurations may require two stage charge control which eliminates the Float charge stage. The 1524 can be configured
for two stage Bulk/Acceptance charge control by setting the Float charge voltage setting to No Float using the IPN-ProRemote. Refer to the IPN-ProRemote
operators manual.
FRONT PANEL INDICATORS
FIGURE 1
EQUALIZATION
¾WARNING: Not all batteries can be safely equalized. Equalization should be performed only on vented liquid electrolyte
lead-acid batteries. Always follow battery manufacturers recommendations pertaining to equalization. Equalization applies a
relatively high voltage producing significant battery gassing. Disconnect equipment that cannot tolerate the high equalization
voltage which is temperature compensated.
The SB1524 can perform automatic equalization alone, or manual equalization via the IPN-ProRemote. Equalization is essentially a controlled
overcharge which applies a relatively high voltage to bring all battery cells up to the same specific gravity and eliminates electrolyte stratification by heavily gassing
the battery. While equalization parameters are adjustable with the IPN-ProRemote, factory default parameters of 15.2V for 2 hours every 30 days are suitable for
most applications. A minimum net charge current of approximately 3.5 amps per 100 amp-hours of battery capacity is required for proper equalization.
The equalization timer is a “time at voltage” time accumulator counting in 3 minute increments. The equalization timer will not count down unless the battery
reaches the equalization voltage setpoint. Unless manually canceled the 1524 will stay in equalize for as long as necessary to accumulate the required time at
voltage. If equalize does not complete by end of the charging day it will resume where it left off the next charging day. If equalize does not complete in a reasonable
period of time due to insufficient current, it should be canceled manually via the IPN-ProRemote or by momentarily removing power to reboot the 1524.
CURRENT LIMIT
Automatic current limit prevents output current from exceeding 20A with 12V batteries and 12V PV’s. If PV open circuit voltage (VOC) ever exceeds
30V which would occur with PV voltage greater than 12V nominal, current limit will become 15A until the 1524 reboots. Note that when the 1524 exits current
limit the charge control system will briefly enter acceptance on it’s way back to MPPT even though battery voltage may be low.
Charge Status Indicator
Shows present charge mode and
approximate battery state of charge.
Auxiliary Output Indicator
Shows when auxiliary output is ON for
load control or auxiliary battery charge.
It is normal for the front panel to be
quite warm to the touch when
operating at high power.

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OPTIONAL TEMPERATURE COMPENSATION
The charge voltage required by batteries changes with battery temperature. Temperature compensation of charge voltage enhances battery
performance and life, and decreases maintenance. Automatic temperature compensation can be provided using the optional battery temperature sensor
(BSE p/n 930-0022-20). The default compensation factor of –5.00mV/°C/cell is appropriate for most lead-acid batteries.
FACTORY DEFAULT CHARGE VOLTAGE SETPOINT -VS.- BATTERY TEMPERATURE
FIGURE 2
MAXIMUM SETPOINT VOLTAGE LIMIT
Regardless of setpoint values entered by the user or result from temperature compensation the 1524 will not apply a charge voltage setpoint greater
than the maximum voltage setpoint limit factory configured to 15.5/31.0V. Note that actual battery voltage may briefly exceed this value by 0.1 – 0.2V as the
voltage control servo responds to changes in load.
MAXIMUM POWER POINT TRACKING (MPPT)
Patented MPPT technology can extract more power and increase charge current up to 30% or more compared to conventional controllers. The
principal operating conditions which affect current boost performance are PV array temperature and battery voltage. At constant solar intensity, available PV
voltage and power increase as PV temperature decreases but it takes an MPPT controller to access this extra power. When PV voltage is sufficiently high in Bulk
for MPPT to operate, a constant power output is delivered to the battery. Since output power is constant a decrease in battery voltage produces a further increase
in charge current. This means that the 1524 provides the greatest charge current increase when you need it most, in cold weather with a discharged battery. In
cool comfortable temperatures most systems see about 10 – 20% increase. Charge current increase can go to zero in hot temperatures, whereas charge current
increase can easily exceed 30% with a discharged battery and freezing temperatures. For a more complete MPPT description see www.blueskyenergyinc.com.
PANEL TEMPERATURE AND OUTPUT POWER
Internal power control devices use the front panel as a heatsink. It is normal for the front panel to become quite warm to the touch when the unit is
operating at high power. When mounted vertically as described in the installation section, the unit can deliver full output in an ambient temperature of up to
50°C (122°F). If an over temperature condition exists, the unit will shut down and the Charge Status Indicator will display an OFF condition. The 1524 does not
include a digital type temperature sensor and will always show the heatsink to be –55°C on the IPN-ProRemote.
MULTIPLE CHARGE CONTROLLERS ON THE IPN NETWORK
The IPN network architecture allows multiple charge controllers to operate as a single charging machine. Up to 8 IPN compatible charge controllers
can reside on a single network and can share a single display and battery temperature sensor. Charge controllers can be added to grow a small system into
a large system and have this large system operate from the users standpoint as a single charge controller.
INSTALLATION
¾WARNING: Read, understand and follow the Important Safety Instructions in the beginning of this manual before proceeding.
This unit must be installed and wired in accordance with National Electrical Code, ANSI/NFPA 70. Over current protection must be
provided externally. To reduce the risk of fire, connect to a circuit provided with 20A maximum branch-circuit over current protection
(25A with 12V battery and 12V PV modules) in accordance with National Electrical Code, ANSI/NFPA 70. Do not connect a PV
array capable of delivering greater than 12A of short circuit current ISC at STC (16A with 12V battery and 12V PV modules). Do not
connect BAT– and PV– together external to the unit. The unit is not provided with a GFDI (ground-fault detector/interrupter) device
and must be used with an external GFDI device as required by Article 690 of NEC for the installation location. To reduce risk of
electric shock, remove all sources of power before installing or servicing. Figures 3, 4 and 5 show generalized connections only and
are not intended to show all wiring, circuit protection and safety requirements for a photovoltaic electrical system.
¾CAUTION: The 1524 is protected against reverse battery and PV polarity, and swapped PV and battery connections, but will be
damaged by reverse battery to the PV terminals. Transient voltage lightning protection is provided, but steady state voltage in
excess of 57VDC on the battery or PV terminals will damage the unit. Damage of either type voids the limited warranty.

Installation and Operation Manual
6
ELECTROSTATIC HANDLING PRECAUTIONS
All electronic circuits may be damaged by static electricity. To minimize the likelihood of electrostatic damage, discharge yourself by touching a water faucet
or other electrical ground prior to handling the 1524 and avoid touching components on the circuit boards. The risk of electrostatic damage is highest when relative
humidity is below 40%.
BATTERY AND PV VOLTAGE
Nominal battery voltage and PV voltage are determined automatically. The battery is considered to be 12V if battery voltage following boot is less than
16V, or 24V if battery voltage is greater. If the battery is determined to be 24V all 12V voltage setpoints are doubled. PV voltage is also determined
automatically. If nominal PV voltage is changed following installation power must be momentarily removed to reboot the 3024 to reconfigure PV voltage.
SELECTING PV MODULES
Voltage, current and power produced by Photovoltaic (PV) modules fluctuate widely with operating conditions. As a result a set of test conditions
referred to as Standard Test Conditions (STC) are used to rate modules in a meaningful manner and accurately predict real world performance. STC
ratings are not maximum or optimal ratings. Conditions can be present where VOC and ISC approach 1.25 times STC ratings which is why National Electrical
Code and our recommendations call for 1.25 derating of both VOC and ISC. Yet in real world conditions IMP is commonly only about 75 – 80% of IMP at STC.
Key PV module specifications;
P
MAX Maximum power in watts (PMAX = VMP x IMP)
V
OC Voltage with module open circuit (typically ≈20 – 22V for 12V modules)
VMP Voltage where module produces Maximum Power (typically ≈17 – 18V for 12V modules)
I
MP Current where module produces Maximum Power
I
SC Current with module Short Circuit
The 1524 will provide the best MPPT current boost performance if all PV modules are identical. If module types are mixed, do not put dissimilar
modules in series. Dissimilar modules in parallel should have VMP values within ≈0.5V or better for 12V modules, and be of the same basic cell technology so
their VMP will tend to track as operating conditions change. If module types are very different consider using a separate charge controller for each module
type to obtain the best MPPT current boost performance.
Select PV modules that do not exceed the maximum ratings shown below, and preferably produce at least 3A of IMP per 100 amp-hours of battery capacity.
Recommended range of VMP at STC
Nominal
Battery
Voltage
Automatic
Current Limit
Maximum
PV Power @
STC
Maximum
PV
Isc @ STC
Maximum
PV
VOC @ STC Nominal 12V PV Nominal 18V PV Nominal 24V PV
12V 20A* 270W 16A* 24.0V* 16.5 – 18.5V 55
12V 15A 200W 8A 45.6V 524.8 – 27.8V 5
12V 15A 200W 6A 45.6V 5533.0 – 37.0V
24V 15A 400W 12A 45.6V 5533.0 – 37.0V
*Current rating and current limit are 20A when charging a 12V battery from nominal 12V PV modules. If
PV VOC ever exceeds 30V (>12V nominal PV modules) current rating and current limit become 15A.
AS SHIPPED FACTORY DEFAULT SETTINGS
¾The 1524 contains various user configurable settings all of which are preconfigured at the factory. Most installations require no
changes to these settings which are typically suitable for most lead-acid batteries including sealed lead-acid batteries such as
Gel and AGM. All software programmable settings require the IPN-ProRemote to change and are retained if power is lost or the
IPN-ProRemote is used as a setup tool only and removed.
Software programmable settings
•Charge mode .............................................. 3-stage •Equalize voltage ....................................................... 15.2/30.4V
•Acceptance voltage .................................... 14.2/28.4V •Equalize time ............................................................ 2.0 hours
•Float voltage ................................................ 13.2/26.4V •Auto equalize days ................................................... 30 days
•Charge time ................................................ 2.0 hours •Maximum voltage setpoint limit ................................ 15.5/31.0V
•Float Transition Current .............................. 1.5A/100 amp-hours •Temperature compensation factor ........................... −5.00mV/°C/cell
•Load control ON voltage ........................... 12.6/25.2V •Dusk-to-Dawn lighting control ................................ Disabled
•Load control OFF voltage ......................... 11.523.0V
DIP switch & jumper settings (All DIP’s OFF, A2 open)
•Auxiliary Output mode ................................ Auxiliary battery charger •IPN Network address ............................................... 0 (zero, IPN Master)
•Equalize ...................................................... Disabled
EQUALIZE ENABLE
If DIP switch #4 is turned OFF, equalization is completely disabled. If DIP switch #4 is turned ON prior to the application of battery power, automatic
equalization is enabled and the 1524 will perform automatic equalization after the set number of Auto Equalize Days has elapsed. If DIP switch #4 is turned
ON, after battery power is applied an automatic equalization cycle will begin immediately. Equalization can also be started and stopped from the IPN-
ProRemote if DIP switch #4 is ON.
)

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BATTERY TEMPERATURE SENSOR
Installation of the optional battery temperature sensor enables temperature compensation of all charge voltage setpoints. In a multi-controller system a
single temperature sensor must connect to the IPN master. Do not attach a sensor or connections other than Blue Sky Energy battery temperature sensor p/n
930-0022-20. The cable may be lengthened or shortened if necessary. Be certain to observe proper RED/BLK polarity.
BATTERY AND PV WIRING
A desirable installation will produce a total system wiring voltage drop of 3% or less. The lengths shown in Table 2 are one way from the PV modules to the
battery with the 1524 located along the path. Wire length can be increased inversely proportional to actual current. If current was reduced by ½, wire lengths could
be doubled and still provide the same 3% voltage drop.
¾CAUTION: Battery, PV and Auxiliary Output terminal block accept #20−10 AWG wire and are to be tightened to 9 in-lb (1
nm). IPN Network and Temperature Sensor compression terminals accept #24−14 AWG wire and are to be tightened to 2.1 in-
lb (0.24 nm). DO NOT connect Bat– and PV– together outside of the unit or improper operation will result. Bat– and PV– connect
together internally.
MAXIMUM CONDUCTOR PAIR LENGTH - 3% VOLTAGE DROP
WIRE GAUGE
AWG
12 VOLT SYSTEM @16A
FEET / METERS
24 VOLT SYSTEM @12A
FEET / METERS
12 AWG 8.0 / 2.4 21.4 / 6.6
10 AWG 12.8 / 4.0 33.8 / 10.4
8 AWG 20.2 / 6.2 53.8 / 16.4
6 AWG 32.4 / 9.8 85.6 / 26.0
4 AWG 51.0 / 15.6 136.2 / 41.4
TABLE 2
SETUP AND WIRING DIAGRAM
FIGURE 3
AUXILIARY OUTPUT
The auxiliary output can serve one of three functions; a 2 amp auxiliary battery charger, a 20 amp 12V or 15 amp 24V load controller with Low Voltage
Disconnect (LVD), or a 15/20 amp variable Dusk-to-Dawn lighting controller. The Charge/Load function is selected by DIP switch #3 shown in Figure 3. The IPN-
ProRemote is required to adjust LVD thresholds or enable Dusk-to-Dawn lighting control. Auxiliary outputs in a networked multi-controller system will function
normally, but only the auxiliary output in the master can be configured or monitored using the IPN-ProRemote. The auxiliary output Load Indicator will illuminate
whenever the auxiliary output is ON.
¾CAUTION: The auxiliary output cannot perform both auxiliary battery charge and load control functions at the same time. Do not
connect to the Load+ terminal for auxiliary battery charge.

Installation and Operation Manual
8
AUXILIARY BATTERY CHARGE – DIP #3 OFF
The auxiliary charge function is used to charge an auxiliary battery of the same voltage as the primary battery. If the primary battery is charging in
Acceptance or Float, up to 2 amps is diverted to the auxiliary battery at the same charge voltage. Auxiliary battery charge is disabled during Bulk or Equalization.
Use 10 or 12 awg wire to minimize voltage drop and the same 25/20 amp over current protection shown in Table 4.
AUXILIARY OUTPUT WIRING
FIGURE 4
LOAD CONTROLLER – DIP #3 ON
The load controller operates as a high side switch from battery positive. Default settings are for Low Voltage Disconnect (LVD) with ON at VBAT ≥12.6/25.2V,
and OFF at VBAT ≤11.5/23.0V. Adjusting these thresholds requires the IPN-ProRemote as a setup tool. Load ON/OFF operation can also be based battery amp-
hours from full if an IPN-ProRemote is permanently installed. The ON/OFF condition must be valid for 20 seconds before switching will occur. If the higher/lower
values are reversed the output control logic is inverted.
¾WARNING:. Over current protection for the load control output must be provided externally. Maximum load current and required
over current protection is specified in Table 4. If the load control is configured to operate based on battery amp-hours from full
configure ON/OFF voltage thresholds as well. If amp-hour from full data is not available, voltage based operation will resume.
ON/OFF thresholds must not be set to the same value or improper operation will result.
LOAD CONTROL RATINGS & OVER CURRENT PROTECTION
Nominal
Battery Voltage Maximum Load Current Maximum Switched Load Power
Maximum Over Current
Protection
12V 20A 300W 25A
24V 15A 450W 20A
TABLE 4
DUSK-TO-DAWN LIGHTING CONTROL – DIP #3 ON
An IPN-ProRemote with software version V2.00 or later is required to setup and enable lighting control. Refer to IPN-ProRemote operators manual for
lighting control setup instructions. Variable time settings are available to turn lighting ON after Dusk (Post-Dusk timer) and/or ON before Dawn (Pre-Dawn timer). If
both timers are set to DISABLED (factory default), the lighting control feature is disabled. If either the Post-Dusk or Pre-Dawn timers are set to a time value the
lighting control feature is enabled. When lighting control is enabled the Load output is controlled by both the normal load control function and the lighting control
function such that whichever function wants the Load output OFF prevails.
Dusk or night time begins when the charge control system turns OFF which occurs when PV module current drops below ≈50mA at battery voltage. Dawn
or day time begins when the charge control system turns ON which occurs when PV module current rises to ≈100mA at battery voltage. If the Post-Dusk timer is
set to 1.0 hour and the Pre-Dawn timer is set to 2.0 hours, lights would turn ON at Dusk, remain ON for one hour, and then turn OFF. Two hours before Dawn the
lights would again turn ON and remain ON until Dawn. For full Dusk to Dawn lighting set the Post-Dusk timer to 20 hours. When the 1524 first boots it does not
know when Dawn is expected to occur so the Pre-Dawn control does not operate for the first night. Once a night time period of 4 hours or more is detected this
night time period is stored and Pre-Dawn control will operate. Each subsequent night time period greater than 4 hours is added to a filtered average of night time.
INSTALLING A MULTI-CONTROLLER SYSTEM
A communication link is established between controllers by daisy chaining a twisted pair cable from the IPN Network terminal block, controller to controller
(A-to-A, B-to-B) as shown in Figure 5. Up to 8 IPN based charge controllers can be connected together in a multi-controller system. Device address 0 (zero) is the
master and 1 – 7 are slaves. The master controls the charging process and directs the activities of the slaves.

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¾CAUTION: A multi-controller system requires the following specialized installation and setup:
1) Each controller must connect to and charge the same primary battery.
2) One controller must be set to address 0 (zero, Master) and the others be set to addresses 1 – 7 with no controllers set the same.
3) Charge parameters are set in the master only.
4) While outputs connect in parallel to a common battery, PV inputs and wiring to each controller must be completely separate.
5) All controllers must be connected to the IPN network as shown in Figure 5.
IPN NETWORK WIRING
FIGURE 5
IPN Network Address – DIP’s #1, #2 & Jumper A2
¾A single controller must be set to IPN network address 0 (zero). In a multi-controller system one controller must be set to
address 0 (zero) to serve as the master. The other controllers must be set to address 1-7 with no two controllers set the same.
The 1524 requires that a jumper be soldered across location A2 to select addresses 4 through 7.
IPN NETWORK ADDRESS
MASTER SLAVESDIP
SWITCH 0 1 2 3 4 5 6 7
JUMPER (A2) NO NO NO NO YES YES YES YES
# 1 (A1) OFF OFF ON ON OFF OFF ON ON
# 2 (A0) OFF ON OFF ON OFF ON OFF ON
MOUNTING
¾CAUTION: Mount the 1524 vertically to promote air flow and do not enclose in a confined space. The 1524 is not watertight and
must be protected from rain, snow and excessive moisture. Do not to place mounting screws under large brown capacitor when
securing mounting box to surface. DO NOT remove from or install into mounting box with power applied as damage resulting from
shorting to the mounting box voids the limited warranty. An optional black powder coated deluxe mounting box available.
DETAILED DIMENSIONAL DRAWING
FIGURE 6
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