OutBack Power Smartharvest Manuel utilisateur

031-331-B1-001, Rev. A (11/2015) 1

Quick Start Guide

SmartHarvest™Pole-Mounted PV Solar Power Station

The SmartHarvest™ Pole-Mounted PV Solar Power Station is composed of a number of pre-installed, pre-wired subsystems.

Before proceeding with the installation, verify which charge controller is installed, review this guide to become familiar with the

various subsystems. Adhere to the electrical and mechanical safety guidelines indicated in this document, as well as all related

documentation for each subsystem.

Refer to the following documents for comprehensive installation instructions and safety information.

Enclosure:

• Alpha Technologies Alpha Pole Mount Bracket Installation Guide (Alpha p/n 745-968-C0)

Charge Controllers:

• SmartHarvestTM SCCM20-100 MPPT Charge Controller/Load Manager

• Morningstar TriStar MPPT TM -30 Solar Charge Controller, (Morningstar p/n MS-000946 v05.1)

Solar Module Racking System, Side of Pole Mount (SPM) –The actual racking system will be determined by the size and

power capacity of the system.

• DPW Solar Side-of-Pole Mount (SPM1) Assembly Instructions

• DPW Solar Side-of-Pole Mount (SPM2) Assembly Instructions

• DPW Solar Side-of-Pole Mount (SPM3) Assembly Instructions

Photovoltaic Modules:

• ET Solar Photovoltaic Modules User Manual

Batteries:

• OutBack Power Technologies EnergyCell Battery Owner's Manual (OutBack Power Technologies p/n 900-0127-01-00)

Audience

This guide is intended for experienced installers familiar with the mechanical and electrical requirements of photovoltaic systems

and qualied, licensed installation personnel. Review all included documentation to become familiar with all of the features and

functions of the equipment in this system before proceeding. Failure to install and/or use this equipment as instructed in the

system documents can result in damage to the equipment. This system is only serviceable by qualied personnel.

Safety Guidelines

Separate safety documentation, as well as technical manuals for the racking system, PV modules, charge controller, enclosure and

batteries are available online. and contain additional product-specic safety information, detailed installation and conguration

information. Comprehensive safety information is contained in OutBack Power Technologies' Important Safety Instructions.

Classes of Symbols used in these documents

WARNING: Hazard to Human Life

This type of notation indicates that the hazard could be harmful to human life.

CAUTION: Hazard to Equipment

This type of notation indicates that the hazard may cause damage to the equipment.

IMPORTANT:

This type of notation indicates that the information provided is important to the installation, operation and/or maintenance of

the equipment. Failure to follow the recommendations in such a notation could result in voiding the equipment warranty.

031-331-B1-001, Rev. A (11/2015)031-331-B1-001, Rev. A (11/2015)

Site Characteristics

In the northern hemisphere, always orient the array to true south. In the southern hemisphere, always orient the array to true

north. To optimize power output, verify that no object, including fencing, trees, buildings and/or other obstructions, will cause any

shading of the array.

Site Latitude Fixed Tilt Angle

0° to 25° 30°

25° to 30° Latitude +5°

30° to 35° Latitude +10°

35° to 40° Latitude + 15°

> 40° 60°

Components that determine tilt

Simplied System Block Diagram

The PV module(s) convert solar energy into DC power which is then fed to the positive (+) and negative (–) terminals on the

charge controller. The design of the charge controller allows for uniform charging of the battery bank and prevents overcharging

conditions. The batteries provide power for loads appropriately rated for the battery string (12Vdc to 48Vdc).

PV Module Tilt

Refer to the accompanying table for recommended tilt angles. The tilt angle is set by the vertical distance (span) between the pole

channels, the selection of an attachment point (a, b, or c) and the length of the strut.

For comprehensive information regarding installation and assembly of the Side-of-Pole mounting rack, refer to DPW Solar's

Side-of-Pole Mount Assembly Instructions.

WARNING: Personal Injury

Use care while assembling the rack assembly. During the assembly procedure components could create hazards, obstructing

free movement and leading to serious bodily injury. These hazards are at head/eye level. The use of head and eye protection is

required.

IMPORTANT:

The SPM-1 racking system is designed for poles 2" to 3.5" in diameter. The SPM-2 and SPM-3 racking systems are designed for poles

3" to 4.5" in diameter.

Mounting Rack Assembly

Item Description Quantity

1 Hose Clamp (standard) 4 per rack

2 Pole Channel 2 per rack

3 Module Rail (left and right) 2 per rack

4 3/8" x 1" hex bolt, lock washer, at washers 6 sets per rack

5 Strut 2 per rack

6 1/4" x 3/4" hex bolt, lock washer, at washers, nut 4 sets per rack

Item Description

1 Pole Channel

2 Module Rail (left and right)

3 Strut (left and right)

Attachment Points

Span

Tools required for racking assembly:

• 7/16" wrench for 1/4" module hardware

• 9/16" wrench for 3/8" hardware

• Torque wrench (optional, recommended)

• Ratchet and extension bar

• Safety eyewear

• Safety headgear

modules

Charge Controller

PV Module breaker

(+)

(–)

PV BATT LOAD

Load circuit breaker

Load (+)

Load (–)

(–)

(+) (–)

(+)

Battery breaker Negative bus bar

Battery string(s)

Illustration courtesy of DPW Solar / Preformed Line Products

IMPORTANT:

The size and capacity of the system determine which charge controller, either the SmartHarvest by OutBack

SCCM20-100 MPPT or Morningstar TriStar MPPT-30, is installed in the system. Verify the particular make and model in

the system and follow instructions in this and related product documentation

031-331-B1-001, Rev. A (11/2015)031-331-B1-001, Rev. A (11/2015)

PV Module Connections

Pole-mounted systems will use either Alpha Technologies' PWE-3 or PWE-6 enclosures. Refer to the Alpha Pole Mount Installation

Guide (745-968-C0) for complete installation and conguration instructions. Read and follow all safety instructions contained in

the manual.

IMPORTANT:

The enclosure must only be installed by qualied personnel.

Enclosure Installation

Mounting the Photovoltaic (PV) Module

PV modules are secured to the mounting rails using 1/4" x 3/4" bolts, with hardware tightened to a torque setting of 7 ft-lb.

Refer to ET Solar Series Photovoltaic Modules User Manual for additional information.

Warning: Electrical Hazard

Photovoltaic modules convert light energy to DC power and are designed for outdoor use. Proper design of support structures

is the responsibility of the system designer and installer. Cover modules with opaque material until modules are installed and

connected to the PV circuit breaker.

WARNING: Personal Injury

Due to the weight and size of the PV module, two installers are required to attach the PV module to the rails.

PV module/SmartHarvest Charge Controller connections

PV module positive (+): Connect to the lower position of PV input circuit breaker.

PV module negative (–): Connect to the charge controller PV negative (–).

PV module/TriStar Charge Controller connections

PV module positive (+): Connect to the lower position of PV input circuit breaker.

PV module negative (–): Connects directly to the negative bus bar.

CAUTION: Hazard to Equipment

In systems congured with a SmartHarvest Charge Controller: Connect PV module negative (–) directly to PV negative (–)

point on the charge controller.

In systems congured with a TriStar Charge Controller: Connect PV module negative (–) to the negative bus bar; the connection

between the negative bus bar and PV negative (–) on the charge controller is pre-wired.

Each system requires the PV module connections to be made as shown above. Connecting the PV modules with reversed polarity

will damage the charge controller.

IMPORTANT:

All PV modules must be wired in series.

1/4" x 3/4" Bolt

Flat Washer

Lock Washer

1/4" Nut

PV Module wiring to SmartHarvest Charge Controller

Positive (+)

Negative (−)

PV Module

Input

PV Module wiring to TriStar Charge Controller

PV Module

Input

Positive (+)

Negative (−)

Illustration courtesy of DPW Solar / Preformed Line Products

031-331-B1-001, Rev. A (11/2015)031-331-B1-001, Rev. A (11/2015)

Required Tools

• 7/16" wrench for 1/4" hardware

• 9/16" wrench for 3/8" hardware

• Torque wrench

• Torque screwdriver

Battery Installation Battery Connections

Battery String(s)

Battery positive(s) (+) are pre-wired to the DC bus via circuit breakers and battery negative(s) (–) are connected to the negative

bus bar. Cables are terminated with ring lugs. Connect the cables to battery positive (+) and negative (–) terminals. The charge

controllers can provide battery sense voltage as well as remote temperature sensing. Pair the battery sense wires with the longest

leads in the battery cable kit and connect them to the same battery. Connect the remote temperature sensor (if used) to a point in

the center of the highest battery string.

Battery Specications

• Slotted screwdriver

• #2 Phillips screwdriver

• Pozidriv #2 Combi head

• Digital voltmeter (DVM)

CAUTION: Equipment Damage

Never reverse the polarity of the battery cables. Always verify correct polarity.

WARNING: Fire Hazard

Always ensure a circuit breaker or overcurrent device is installed on the DC positive conductor for each device connected

to the batteries.

WARNING: Fire Hazard

Never install extra washers or hardware between the mounting surface and the battery cable lug or interconnect. The decreased

surface area can build up heat.

WARNING: Personal Injury

• Some batteries can weigh in excess of 69 lb (31 kg). Use safe lifting techniques when lifting this equipment as prescribed by

the Occupational Safety and Health Association (OSHA) or other local codes. Lifting machinery may be necessary.

• Wear appropriate protective equipment when working with batteries, including eye or face protection, acid-resistant

gloves, an apron, and other items. Avoid touching bare skin or eyes while working near batteries.

• Keep plenty of fresh water and soap nearby in case battery acid contacts skin, clothing, or eyes.

• If battery acid contacts skin or clothing, wash immediately with soap and water.

• If acid enters the eye, immediately ood it with running cold water for at least 20 minutes and get medical attention as soon

as possible.

• Wash hands after any contact with the lead terminals or battery electrolyte.

WARNING: Explosion, Electrocution, or Fire Hazard

• Ensure clearance requirements are strictly enforced around the batteries.

• Ensure the area around the batteries is well ventilated and clean of debris.

• Never smoke or allow a spark or ame near the batteries.

• Always use insulated tools. Avoid dropping tools onto batteries or other electrical parts.

• Never charge a frozen battery.

• Insulate batteries as appropriate against freezing temperatures. A discharged battery will freeze more easily than a

charged one.

• If a battery must be removed, always remove the grounded terminal from the battery rst. Make sure all devices are

de-energized or disconnected to avoid causing a spark.

• Do not perform any servicing other than that specied in the installation instructions unless qualied to do so and have

been instructed to do so by OutBack Technical Support personnel.

Battery Model Specications

EnergyCell RE Top Terminal 78RE 106RE

Nominal Voltage per cell 12Vdc 12Vdc

Capacity Rates (1.75VPC) 20Hr: 75Ah 100Hr: 78Ah 20Hr: 100Ah 100Hr: 106Ah

Cycle Life (50%DOD @25°C) 1800 cycles 1800 Cycles

Float Cycle Life (@25°C) 10 years 10 years

Weight (lbs) 54 69

Dimensions L x W x H (in) 10.2 x 6.8 x 8.0 13.5 x 6.8 x 8.5

Warranty 2 years 2 years

Additional battery information is available in OutBack Power Technologies' EnergyCell Battery Owner's Manual.

• Work gloves

• Safety glasses

• Battery spill clean-up kit

To negative bus bar

To DC input breakers

12Vdc battery bank

Hardware arrangement, EnergyCell 78RE, 106RE

top terminal batteries

Battery Sense

Cable (RTS)

Battery Cable

3/4" x 1/4-20 Bolt

Battery Terminal

Lock Washer

Flat Washer

–

To negative bus bar

24Vdc battery bank, 3 strings of 12Vdc batteries wired in series

To DC input breakers

–

+ +

–

To negative bus bar

24Vdc battery bank, 2 x 12Vdc batteries wired in series

To DC input breakers

–

+ +

031-331-B1-001, Rev. A (11/2015)031-331-B1-001, Rev. A (11/2015)

Circuit Breaker Specications

Wire Size mm2 (IEC) 0.75 to 35 mm2

Wire Gauge (UL) 18 to 2 AWG

Torque (IEC) 2.5 Nm

Torque (UL) 20 in-lb

Comments Pozidriv #2 Combi head

WARNING: Electrical Hazard

Only qualied personnel should install and wire the system or have access to the inside of the enclosure.

Wiring the System, SmartHarvest SCCM20-100 Charge Controller

The system is shipped with the bulk of the wiring connections already in place. Remove the xing screw on the underside of the

cover plate to expose the connection terminals and make connections as shown. Verify pre-existing wiring is still in place and

tightened to proper torque settings. Replace the cover plate after inspecting the connections.

PV module connections

PV module positive (+) to PV breaker

PV module negative (–) to charge controller negative (–)

Charge Controller connections

PV module breaker to charge controller PV positive (+)

Battery positive (+) from charge controller to master DC circuit breaker

Battery negative (–) from charge controller to negative bus bar

Battery string connections

String #1 positive (+)

String #2 positive (+)

String #3 positive (+)

String #1 negative (–)

String #2 negative (–)

String #3 negative (–)

Load connections

Charge controller DC (+) to load output circuit breaker

DC output voltage positive (+)

DC output voltage negative (–)

Ground connection

PV module circuit breaker

DC bus master breaker

Load output circuit breaker

3 4 5 12 14

Charge Controller connection detail, including optional battery

sense wiring and remote temperature sensor wiring

Battery temperature sensor (optional);

connect to battery (+) terminal

Battery sense wire; connect to

battery (+) terminal

Terminal block torque

0.9 Nm / 8 in-lb

System Startup, SmartHarvest SCCM20-100 Charge Controller

CAUTION: Hazard to Equipment

Reversed polarity will damage the charge controller.

CAUTION: Hazard to Equipment

Failure to close the battery breakers before closing the PV breaker will damage the charge controller.

IMPORTANT:

The SCCM20-100 requires a minimum load to wake up from sleep mode. Refer to SCCM20-100 manual for details.

Before Startup:

• Verify the PV breaker is open.

• Verify the DC bus master breaker and any used battery string breakers are open.

• Verify the load breaker is open.

Startup Procedure

1. Close the connected battery string breaker(s).

2. Close the DC master breaker. The three LEDs on the front panel of the charge controller will ash once and go out.

3. Close the PV input breaker. The three LEDs on the front panel of the charge controller will ash once, then remain o. After approximately

20 seconds, the green LED will light and be on solid, indicating the presence of PV input. The yellow LED will blink indicating the state of

charge of the battery string.

4. Measure across the Load positive (+) and Load negative (–) terminals on the charge controller. The voltage measured should match the

battery string voltage.

5. Close the Load breaker and measure between the load terminal positive (+) and negative (–). The voltage measured should match the

voltage measured at the charge controller.

ABC

APV module circuit breaker BDC bus master breaker CLoad output circuit breaker

031-331-B1-001, Rev. A (11/2015)031-331-B1-001, Rev. A (11/2015)

10 11

Charge Control / Load Control

LEDs on the SmartHarvestTM SCCM20-100 Charge Controller indicate battery state, operational status and alarm conditions as

indicated in the table below.

Indications/Alarms, SmartHarvest SCCM20-100 Charge Controller

SmartHarvest SCCM20-100 LED Indicators

Load LED

(Red)

Solid Load disconnected

Slow ash Battery load critical – Charge < 20%

O OK – no error

Battery LED

(Yellow)

Solid Battery charge >90%

Slow ash Battery charge >50%

Rapid ash Battery charge <50%

O Battery critical < 20%

PV LED

(Green)

Solid PV present

Slow ash Battery charging

O No PV present

Troubleshooting

Problem Possible remedies (perform in order shown)

Battery not charging 1) Check battery connections

2) Check PV voltage and connections

3) Check breakers.

4.) Allow charger to cool

No LED indicators with PV power available 1) Check battery voltage at controller terminals

2) Check panel voltage at controller terminals

Red LED on 1) Disconnect load

2) Disconnect PV

3) Disconnect battery

4) Reconnect battery

5) Reconnect PV

6) Reconnect load

Red LED ashing 1) Disconnect loads

2) Recharge battery

Yellow LED not on Charge battery

Charging to wrong voltage 1) Check position of battery selection jumper

2) Check installation of thermistor

Load not powered Check minimum load for charge controller

System Shutdown, SmartHarvest SCCM20-100 Charge Controller

1. Open the Load output breaker.

2. Open the PV input breaker.

3. Open the master DC circuit breaker.

4. Open any connected battery breakers.

5. Measure across the Load positive (+) and Load negative (–) terminals on the charge controller. Verify a reading of 0 Vdc, indicating

the system is oine.

ABC

APV module circuit breaker BDC bus master breaker CLoad output circuit breaker

WARNING: Electrical Hazard

Prior to beginning the shutdown procedure, cover the PV modules with opaque material to prevent the conversion of light energy

into DC power.

CAUTION: Hazard to Equipment

Opening the battery breakers before opening the PV or load breaker will damage the charge controller.

CAUTION: Hazard to Equipment

The master battery breaker must be opened during periods of no solar input that extend beyond the rated 3 day blackout

autonomy e.g. solar panel service, prolonged snow cover, debris build up on panel. Failure to either recharge the batteries or open

the master battery breaker during an extended outage may result in permanent damage to the batteries.

031-331-B1-001, Rev. A (11/2015)031-331-B1-001, Rev. A (11/2015)

12 13

Wiring the System, Morningstar TriStar MPPT-30 Charge Controller

Connection detail, charge controller termination board

PV module positive (+) to the charge controller PV positive (+)

Battery positive (+) from the charge controller to the master DC circuit breaker

Battery negative (–) from the charge controller to the negative bus bar

Charge Controller connections, LEDs, battery sense wiring and remote

temperature sensor wiring

Battery temperature sensor

Battery sense positive (+)

Battery sense negative (–)

To enclosure ground

Illustrations courtesy of Morningstar Corp.

LED indicators

Three LED indicators provide information

regarding general controller transitions, battery

status, controller faults and alarms.

Green

Yellow

Red

ABCD

Wiring the System, Morningstar TriStar MPPT-30 Charge Controller

Circuit Breaker Specications

Wire Size mm2 (IEC) 0.75 to 35 mm2

Wire Gauge (UL) 18 to 2 AWG

Torque (IEC) 2.5 Nm

Torque (UL) 20 in-lb

Comments Pozidriv #2 Combi head

Battery string connections

String #1 positive (+)

String #2 positive (+)

String #3 positive (+)

String #1 negative (–)

String #2 negative (–)

String #3 negative (–)

Load connections

Battery bus to LVD positive (+)

LVD negative (–) to negative bus bar

LVD (Load) to Load output circuit breaker

DC output voltage positive (+)

DC output voltage negative (–)

Ground connection (–)

Teminal block wiring torque value = 0.9 Nm / 8 in-lb

PV module connections

PV module positive (+)

PV module negative (–)

Charge Controller connections

PV module positive (+) to charge controller PV positive (+)

Battery positive (+) from charge controller to DC bus master

circuit breaker

Battery negative (–) from charge controller to negative bus bar

APV module breaker BDC bus breaker CLow voltage disconnect (LVD) DLoad output breaker

WARNING: Electrical hazard

Only qualied personnel should install and wire the system or have access to the inside of the enclosure.

The system is shipped with the bulk of the wiring connections already in place. Use a #2 Phillips screwdriver to remove the four

(4) screws that secure the wiring box cover. Verify the pre-existing wiring is still in place and tightened to proper torque settings.

Replace the cover after inspecting the connections.

212

IllustrationofMorningstarTriStarMPPT-30ChargeControllercourtesyofMorningstarCorp.

Terminal block torque

0.9 Nm / 8 in-lb

031-331-B1-001, Rev. A (11/2015)031-331-B1-001, Rev. A (11/2015)

14 15

Indications/Alarms, Morningstar TriStar MPPT-30 Charge Controller

with PT-10 Low Voltage Disconnect

Charge Control / Load Control

LEDs on the Morningstar TriStar MPPT-30 Charge Controller indicate battery state, operational status and alarm conditions as

listed in the table below. Detailed information regarding alarm states can be found in the TriStar MPPT-30 Solar System Controller,

technical manual (p/n MS-000946 v05.1)

TriStar TS-MPPT-30 LED Indicators

General Transitions LED Indications

Controller start-up Green / Yellow / Red (one cycle)

Equalize request start Green + Yellow + Red / Green + Yellow + Red / Green / Green

Equalize cancelled Green + Yellow + Red / Green + Yellow + Red / Red / Red

Battery service is required* All 3 LEDs blinking until service is reset

*Battery service notication is only enabled in custom settings

Battery Status (General State of Charge) LED Indications

80% to 95% Green

60% to 80% Green + Yellow

35% to 60% Yellow

0% to 35% Yellow + Red

Battery is discharging Red

Absorption state Green blinking (½ second on / ½ second o)

Equalization state Green fast blink (2.5 times per second)

Float state Green slow blink (1 second on / 1 second o)

Faults & Alarms LED sequence; repeating until the fault is cleared

Over-temperature Yellow / Red (sequencing)

Battery high voltage disconnect Green / Red (sequencing)

DIP switch fault or DIP switch changed Red / Yellow / Green (sequencing)

Self-test faults Red / Yellow / Green (sequencing)

Custom settings edit Red / Green / Yellow (sequencing)

Remote Temperature Sensor (RTS) Green + Yellow / Yellow + Red (sequencing)

Battery voltage sense failure Green + Yellow / Yellow + Red

System Startup, Morningstar TriStar MPPT-30 Charge Controller

Before Startup:

• Verify the PV disconnect is open.

• Verify the Battery disconnect and any used battery string disconnect(s) are open.

• Verify the load disconnect is open.

Startup Procedure

1. Conrm the polarities of the PV module wiring and Battery string wiring are correct.

2. Close the connected battery string breakers (1 through 3).

3. Close the master battery disconnect. The LEDs on the charge controller will sequentially blink one cycle of Green-Yellow-Red, indicating

a successful startup.

ACD

IllustrationofMorningstarTriStarMPPT-30ChargeControllercourtesyofMorningstarCorp.

APV disconnect BBattery disconnect CLow voltage disconnect (LVD), Model PT10 DLoad disconnect

CAUTION: Hazard to Equipment

Reversed polarity will damage the charge controller.

CAUTION: Hazard to Equipment

Failure to close the battery breakers before closing the PV breaker will damage the charge controller.

Dual-color LED

indicates normal

operating state or

alarm state.

NOTE:

A battery must be connected to the TriStar MPPT to start and operate the controller. The controller will not operate only from

solar input.

4. Close the PV disconnect. The color and activity of the LEDs will indicate the state of charge of the battery string.

5. Close the Load disconnect. The green LED on the Low Voltage Disconnect device will be on solid indicating battery voltage is

within the disconnect (10.5 Vdc) and reconnect (12.5 Vdc) voltage limits as set by the factory.

6. Measure across the Load positive (+) and Load negative (–) on the charge controller to verify the battery voltage.

Battery

strings B

123

Low Voltage Disconnect (Model PT10)

Event Result Indication Action

Normal operation Low voltage disconnect is closed;

voltage supplied to load Green LED is on solid None required

Battery voltage decreases to disconnect

level (10.5Vdc)

Low voltage disconnect opens and

removes load from batteries.

Red (Alarm) LED is on

solid. Recharge batteries.

Battery voltage increases to reconnect

level (12.5Vdc)

Low voltage disconnect closes and

reconnects load to batteries.

Alarm LED switches

from Red to Green; LED

is on solid

Load reconnected;

No action required.

The dual-color LED on the PT-10 Low Voltage Disconnect indicates whether the unit is in normal operation or in an alarm state as

indated in the table below.

member of

The Group

Worldwide Corporate Oces

North America

Tel: +1 360.435.6030

Fax: +1 360.435.6019

Europe

Tel: +49 9122.79889.0

Fax: +49 9122.79889.21

Latin America

Tel: +1 561.792.9651

Fax: +1 561.792.7157

Asia Pacic

Tel: +852 2736.8663

Fax: +852 2199.7988

031-331-B1-001 Rev. A (11/2015)

System Shutdown, Morningstar TriStar MPPT-30 Charge Controller

1. Open the load output circuit breaker (the Green LED on the LVD will remain on).

2. Open the PV module circuit breaker.

3. Open the DC bus master circuit breaker (the Green LED on the LVD will turn o at this time).

4. Open any connected battery breakers.

5. Measure across the Load positive (+) and Load negative (–) on the charge controller. Verify a reading of 0 Vdc, indicating

the system is oine.

ABCD

IllustrationofMorningstarTriStarMPPT-30ChargeControllercourtesyofMorningstarCorp.

APV module breaker BDC bus breaker CLow voltage disconnect (LVD) DLoad output breaker

WARNING: Electrical Hazard

Prior to beginning the shutdown procedure, cover the PV modules with opaque material to prevent the conversion of light energy

into DC power.

CAUTION: Hazard to Equipment

Opening the battery breakers before opening the PV or load breaker will damage the charge controller.

CAUTION: Hazard to Equipment

The master battery breaker must be opened during periods of no solar input that extend beyond the rated 3 day blackout

autonomy e.g. solar panel service, prolonged snow cover, debris build up on panel. Failure to either recharge the batteries or open

the master battery breaker during an extended outage may result in permanent damage to the batteries.

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