Samlexpower SMC-20 User manual

Solar
Charge
Controller
SMC-20
Please read this
manual BEFORE
installing your
Solar Charge
Controller
Owner's
Manual

2 | SAMLEX AMERICA INC.
OWNER'S MANUAL | Index
SECTION 1
Safety .................................................................................... 3
SECTION 2
Description .................................................................................. 5
SECTION 3
Installation ................................................................................... 7
SECTION 4
Operation ................................................................................ 11
SECTION 5
Maintenance .................................................................................. 11
SECTION 6
Troubleshooting ............................................................................. 12
SECTION 7
Specications .................................................................................. 14
SECTION 8
Warranty .................................................................................. 15
DETAILED PRODUCT INFORMATION
For a complete user manual including specications, application
notes, installation instructions, trouble shooting and more, please
visit the web page for this product on www.samlexamerica.com.
Product page can be found using the “Search by Model” eld.

SAMLEX AMERICA INC. | 3
SECTION 1 | Safety
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important Safety and Operating Instructions. Please
read before using this unit .
These operating instructions are part of the product. Read these operating
instructions carefully before use, keep them over the entire lifetime of the
product, and pass them on to any future owner or user of this product.
Applicability
This manual describes the installation, function, operation and mainte-
nance of the solar charge controller.
Further technical information is provided in a separate technical manual.
Users
These operating instructions are intended for end customers. A technical
expert must be consulted in cases of uncertainty.
Description of symbols
Safety instructions are identied as follows:
!CAUTION!
Type, source and consequences of the danger! Measures
for avoiding danger.
SAFETY
Proper usage
The solar charge controller may only be used in PV systems for charging and
controlling lead-acid batteries in accordance with this operating manual
and the charging specications of the battery manufacturer.
Improper usage
No energy source other than a solar generator may be connected to the
solar charge controller. No mains devices, diesel generators or wind genera-
tors may be connected. Do not connect any defective or damaged measur-
ing equipment.
General safety instructions
- Follow the general and national safety and accident prevention
regulations.
- Never alter or remove the factory plates and identication labels.
- Keep children away from PV systems.
- Never open the device.
Other risks
1. Danger of re and explosion:
- Do not use the solar charge controller in dusty environments, in the
vicinity of solvents or where inammable gases and vapours can occur.
- No open res, ames or sparks in the vicinity of the batteries.

4 | SAMLEX AMERICA INC.
SECTION 1 | Safety
- Ensure that the room is adequately ventilated.
- Check the charging process regularly.
- Follow the charging instructions of the battery manufacturer.
2. Battery acid:
- Acid splashes on skin or clothing should be immediately treated with
soap suds and rinsed with plenty of water.
- If acid splashes into the eyes, immediately rinse with plenty of water.
Seek medical advice.
Fault behaviour
Operating the solar charge controller is dangerous in the
following situations:
- The solar charge controller does not appear to function at all.
- The solar charge controller or connected cables are visibly damaged.
- Emission of smoke or uid penetration.
- When parts are loose.
- In these cases immediately remove the solar charge controller
from the solar modules and battery.

SAMLEX AMERICA INC. | 5
2 1 3
345
12a 2b 2c 2d
FUNCTIONS
The solar charge controller:
- Monitors the state of charge of the battery bank,
- controls the charging process,
- controls the connection/disconnection of loads.
This optimises battery use and signicantly extends its service life.
A battery charging algorithm protects the battery from harmful states.
Activation of the three deep discharge functions (LVW, LVD and LVR) is
dependent upon the state of charge (SOC). The switching thresholds lie
within the corresponding voltage window in accordance with the discharge
or charging current.
CONSTRUCTION
The solar charge controller consists of the following components:
1. Info LED
2. 4 LEDs for displaying the State of Charge
(RED - 2a, YELLOW - 2b, GREEN - 2c & GREEN - 2d)
3. Terminal block for connecting solar module
4. Terminal block for connecting battery
5. Terminal block for connecting loads
SECTION 2 | Description

6 | SAMLEX AMERICA INC.
LED DISPLAYS
LED STATUS MEANING
Info LED (1) Illuminates GREEN Normal operation
Flashes RED A fault exists
(see Section 6: Troubleshooting)
RED LED (2a) Flashing quickly Battery empty,
State of Charge < 40%. When the
battery continues to be discharged,
the deep-discharge deactivation
is triggered
Flashing Deep-discharge deactivation,
State of Charge < 30%
YELLOW LED
(2b)
Illuminates Battery weak,
State of Charge < 50%
Flashing Switch-on threshold after deep-
discharge deactivation has not yet
been reached, State of charge is
40% to 50%
GREEN LED (2c) Illuminates Battery good,
State of Charge > 50%
GREEN LED (2d) Illuminates Battery full, State of Charge > 80%
Flashing quickly Battery full, charge regulation active,
i.e. charging current reduced
SECTION 2 | Description

SAMLEX AMERICA INC. | 7
SECTION 3 | Installation
!WARNING!
Danger of explosion from sparking! Danger of electric shock!
- The solar charge controller may only be connected to the local loads
and the battery by trained personnel and in accordance with the ap-
plicable regulations.
- Follow the installation and operating instructions for all components
of the PV system.
- Ensure that no cables are damaged.
MOUNTING THE SOLAR CHARGE CONTROLLER
Mounting location requirements
- Do not mount the solar charge controller outdoors or in wet rooms.
- Do not subject the solar charge controller to direct sunshine or other
sources of heat.
- Protect the solar charge controller from dirt and moisture.
- Mount upright on the wall (concrete) on a non-ammable substrate.
- Maintain a minimum clearance of 10 cm below and around the device
to ensure unhindered air circulation.
- Mount the solar charge controller as close as possible to the batteries
(with a safety clearance of at least 30 cm).
Fastening the solar charge controller
- Mark the position of the solar charge controller fastening holes on
the wall.
- Drill 4 x 6 mm holes and insert dowels.
- Fasten the solar charge controller to the wall with the cable
openings facing
down- wards, using 4 oval head screws M4 x 40 (DIN 7996).
CONNECTION
Preparing the wiring
The cross section of the connection cable depends on the power output of
the solar charge controller.
CONTROLLER
TYPE
LOAD/MODULE
CURRENT CROSS-SECTION AWG INSULATION
20A 20A 10 mm2885°C
The table above applies to the following cable lengths:
- 10 m solar module connection cable
- 2 m battery connection cable
- 5 m load connection cable
Consult a dealer if the specied cable lengths are inadequate.

8 | SAMLEX AMERICA INC.
SECTION 3 | Installation
An additional external fuse (not provided) must be connected to the
battery connection cable, close to the battery pole. The external fuse pre-
vents cable short circuits. A 40A fuse can be used for all controller types.
!WARNING!
Danger of explosion from sparking! Danger of electric shock! Solar mod-
ules generate electricity under incident light. The full voltage is present,
even when the incident light levels are low.
- Protect the solar modules from incident light during installation, e.g.
cover them.
- Never touch uninsulated cable ends.
- Use only insulated tools.
- Ensure that all loads to be connected are switched OFF. If necessary,
remove the fuse.
- Connections must always be made in the sequence described below.
345
12a 2b 2c 2d
2 1 3
A+ A-
MM-
Battery
(40A Fuse at A+)
LL-
Load
Solar
Module

SAMLEX AMERICA INC. | 9

1ST STEP: CONNECT THE BATTERY
- Label the battery connection cables as a plus cable (A+)
and a minus cable (A–).
- Lay the battery cables in parallel between the solar
charge controller and the battery.
- Connect the battery connection cable with the correct polarity to the
middle pair of terminals on the solar charge controller (with the bat-
tery symbol).
- Remove any external 40A fuse in battery connection cable A+.
- Connect battery connection cable A+ with 40A fuse to the Positive
pole of the battery.
- Connect battery connection cable A– to the Negative pole of the bat-
tery.
- Replace the external fuse in the battery connection cable A+.
- If the connection polarity is correct, the info LED illuminates green.
2ND STEP: CONNECT THE SOLAR MODULE
- Ensure that the solar module is protected from incident
light.
- Ensure that the solar module does not exceed the
maximum permissible input current.
- Label the solar module connection cables as a plus cable (M+) and a
minus cable (M–).
- Lay both solar module connection cables in parallel between the solar
module and the solar charge controller.
- First connect the M+ solar module connection cable to the correct
pole of the left pair of terminals on the solar charge controller (with
the solar module symbol), then connect the M– cable.
- Remove the covering from the solar module.
3RD STEP: CONNECT LOADS
Notes:
- Deep Discharge Protection (also called Low Voltage
Disconnect or LVD) is only provided for loads < 20A that
are connected to the Load Terminals (5).
- Critical loads like emergency lights, radios, etc. that require un-inter-
rupted power source are connected directly to the battery through
fuse – close to the battery to protect battery cables against short
circuit.
- Loads drawing > 20A should be connected directly to the battery,
preferably through separate Low Voltage Disconnect (LVD). Appropri-
ate fuse should be used close to the battery to protect battery cables
against short circuit.
- Other loads drawing < 20A should be connected to the Load Terminals
(5) as follows:
- Label the load connection cables as a plus cable (L+) and a minus
cable (L–).
- Lay the load connection cables in parallel between the solar
charge controller and the load
SECTION 3 | Installation



10 | SAMLEX AMERICA INC.
SECTION 3 | Installation
- First connect the L+ load cable to the correct pole of the right pair
of terminals on the solar charge controller (with the lamp symbol),
then connect the L– cable.
- Replace the load fuse or switch on the load.
4TH STEP: FINAL WORK
Fasten all cables with strain relief in the direct vicinity of the solar charge
controller(clearance of approx. 10 cm).
GROUNDING
The components in stand-alone systems do not have to be grounded –
this is not standard practice or may be prohibited by national regulations
(e.g.: DIN 57100 Part 410: Prohibition of grounding protective low voltage
circuits). Consult the technical manual for more information. In case
grounding is mandatory, ground ONLY the Negative Battery Terminal.
LIGHTNING PROTECTION
In systems subjected to an increased risk of overvoltage damage, we
recommend installing additional lightning protection / overvoltage
protection to reduce dropouts. Consult the technical manual for more
detailed information.

SAMLEX AMERICA INC. | 11
The solar charge controller immediately begins operation once the battery
is connected or the external fuse is inserted.
The displays of the solar charge controller show the current operating
mode. User intervention or user settings are not required.
PROTECTION FUNCTIONS
The following integrated protection functions of the solar charge control-
ler ensure that the battery is handled as gently as possible.
The following protection functions are part of the basic function of the
controller:
- Overcharge protection
- Deep discharge protection
- Battery undervoltage protection
- Solar module reverse current protection
The following installation faults do not damage the controller. After
correcting the fault, the device will continue to operate correctly:
- Protection from solar module short circuits / incorrect solar
module polarity1)
- Protection from short circuits at the load output or excessive
load current
- Protection from battery connection with incorrect polarity
- Protection from solar module overcurrent
- Protection from device overtemperature
- Protection from overvoltage at the load output
- Protection from the wrong connection sequence
1The reverse-polarity protection of the solar module in a 24V system is
only provided up to an open-circuit module voltage of 36V.
SECTION 5 | Maintenance
The solar charge controller is maintenance-free.
All components of the PV system must be checked at least annually,
according to the specications of the respective manufacturers.
- Ensure adequate ventilation of the cooling element.
- Check the cable strain relief.
- Check that all cable connections are secure.
- Tighten screws if necessary.
- Terminal corrosion.
SECTION 4 | Operation

12 | SAMLEX AMERICA INC.
SECTION 6 | Troubleshooting
ISSUE CAUSE REMEDY
NO LED DISPLAY
Battery voltage too low Pre-charge the battery
The external fuse in the
battery connection cable
has blown.
Replace the external fuse
Battery is not connected 1. Unclamp all connections
2. Connect a (new) battery with
the correct polarity
3. Reconnect the solar module
and loads
Battery is connected with
the wrong polarity
Battery is defective
INFO LED (1)
FLASHES RED
Charging interrupted due
to excessive charging
current ( > 20A)
Charging automatically continues
as soon as the charging current
lies within the permissible range
LOAD CANNOT
BE OPERATED
OR ONLY FOR A
SHORT TIME
+
INFO LED (1)
FLASHES RED
Load output is switched
OFF due to excessive load
current
- Reduce load current, if necessary
switch OFF or disconnect loads
- Check loads
Load output is switched
OFF due to short circuit at
load output
- Disconnect loads
- Correct the cause of the
short circuit
- Reconnect loads
Load output is switched
OFF due to overheating of
the solar charge controller
The load output automatically
switches on again once the solar
charge controller has cooled down
- Improve the cooling air
circulation
- Remove any other heat sources
- Check the conditions of use and
the mounting location
LOAD CANNOT BE
OPERATED
+
INFO LED (1)
FLASHES RED
+
RED BATTERY
LED (2a)
FLASHES
Load output is switched
OFF due to too low
battery voltage
The load output automatically
switches ON again as soon as the
battery voltage lies within the
permissible range
- Pre-charge the battery
- Use additional Low Voltage
Disconnect (LVD) for loads > 20A
that are connected directly to
the battery
- Check the battery and replace
if necessary

SAMLEX AMERICA INC. | 13
SECTION 6 | Troubleshooting
ISSUE CAUSE REMEDY
LOAD CANNOT
BE OPERATED
+
INFO LED (1)
FLASHES RED
+
GREEN LED (2d)
FLASHES
Load output is switched
OFF due to excessive
battery voltage
The load output automatically
switched on again as soon as the
battery voltage lies within the
permissible range
Incorrect grounding Check the grounding. Grounding
is allowed only on the Negative
Battery Terminal
External charging source
is not voltage-limited
- Check the external charging
source
- If necessary, switch OFF external
charging source
LOAD CANNOT
BE OPERATED
+
INFO LED (1)
ILLUMINATES
GREEN
Defective load or
installation error
- Connect load correctly
- Replace load
BATTERY IS
NOT CHARGED
Solar module not
connected
Connect the solar module
Solar module
connected with
incorrect polarity
Connect the solar module with
the correct polarity
Short circuit at solar
module input
Correct the cause of the short
circuit
Incorrect solar module
voltage
Use a solar module of the
specied voltage
Solar module defective Replace the solar module
BATTERY DISPLAY
JUMPS QUICKLY
Large pulse current Adjust the current consumption
to match the battery capacity
Battery is defective Replace the battery

14 | SAMLEX AMERICA INC.
SPECIFICATIONS SMC-20
MAXIMUM MODULE INPUT SHORT CIRCUIT
CURRENT AT 50°C 20A
MAXIMUM LOAD OUTPUT CURRENT AT 50°C 20A
TERMINAL SIZE (STRANDED / SOLID WIRE) 16/25 MM2= 6/4 AWG
WEIGHT 345 g
.76 LB.
DIMENSIONS (L X W X H) 187 X 96 X 45 MM
7.36 X 3.75 X 1.77 INCHES
ENCLOSURE PROTECTION CLASS IP 32
SYSTEM VOLTAGE 12V / 24V
AMBIENT TEMPERATURE ALLOWED -25°C TO + 50°C / -13°F TO + 122°F
MAXIMUM VOLTAGE OF SOLAR MODULE 47 V DC
TEMPERATURE COMPENSATION - 4 mV / °K / Cell
SMC-20 SOLAR CHARGE CONTROLLER 12V SYSTEM 24V SYSTEM
PERMISSABLE BATTERY VOLTAGE RANGE* 9 - 17V 17.1 - 34V
DEEP DISCHARGE WARNING (SOC / LVW) < 40% / 11.7V ~
12.3V
< 40% / 23.4V ~
24.6V
DEEP DISCHARGE PROTECTION (SOC / LVD) < 30% / 11.2V ~
11.6V
< 30% / 22.1V ~
23.2V
RECONNECTION SET POINT (SOC / LVR) < 50% / 12.4V ~
12.7V
< 50% / 24.8V ~
25.4V
END OF CHARGE VOLTAGE (FLOAT) 13.9V 27.8V
BOOST CHARGE VOLTAGE (BOOST) 14.4V 28.8V
EQUALISATION CHARGE (EQUAL) 14.7V 29.4V
NOTE:
Specications that vary from the above are given on the device label.
Subject to change without notice.
*If the battery voltage is less than 9 V, the controller switches off and cannot
recharge the battery itself, even if sufcient power is available from the module.
SECTION 7 | Specications

SAMLEX AMERICA INC. | 15
SPECIFICATIONS SMC-20
MAXIMUM MODULE INPUT SHORT CIRCUIT
CURRENT AT 50°C 20A
MAXIMUM LOAD OUTPUT CURRENT AT 50°C 20A
TERMINAL SIZE (STRANDED / SOLID WIRE) 16/25 MM2= 6/4 AWG
WEIGHT 345 g
.76 LB.
DIMENSIONS (L X W X H) 187 X 96 X 45 MM
7.36 X 3.75 X 1.77 INCHES
ENCLOSURE PROTECTION CLASS IP 32
SYSTEM VOLTAGE 12V / 24V
AMBIENT TEMPERATURE ALLOWED -25°C TO + 50°C / -13°F TO + 122°F
MAXIMUM VOLTAGE OF SOLAR MODULE 47 V DC
TEMPERATURE COMPENSATION - 4 mV / °K / Cell
SMC-20 SOLAR CHARGE CONTROLLER 12V SYSTEM 24V SYSTEM
PERMISSABLE BATTERY VOLTAGE RANGE* 9 - 17V 17.1 - 34V
DEEP DISCHARGE WARNING (SOC / LVW) < 40% / 11.7V ~
12.3V
< 40% / 23.4V ~
24.6V
DEEP DISCHARGE PROTECTION (SOC / LVD) < 30% / 11.2V ~
11.6V
< 30% / 22.1V ~
23.2V
RECONNECTION SET POINT (SOC / LVR) < 50% / 12.4V ~
12.7V
< 50% / 24.8V ~
25.4V
END OF CHARGE VOLTAGE (FLOAT) 13.9V 27.8V
BOOST CHARGE VOLTAGE (BOOST) 14.4V 28.8V
EQUALISATION CHARGE (EQUAL) 14.7V 29.4V
NOTE:
Specications that vary from the above are given on the device label.
Subject to change without notice.
*If the battery voltage is less than 9 V, the controller switches off and cannot
recharge the battery itself, even if sufcient power is available from the module.
SECTION 8 | Warranty
5 YEAR LIMITED WARRANTY
SMC-20 Solar Charge Controller manufactured by Samlex America, Inc. (the
“Warrantor“) is warranted to be free from defects in workmanship and
materials under normal use and service. The warranty period is 5 years for
the United States and Canada, and is in effect from the date of purchase by
the user (the “Purchaser“).
Warranty outside of the United States and Canada is limited to 6 months.
For a warranty claim, the Purchaser should contact the place of purchase to
obtain a Return Authorization Number.
The defective part or unit should be returned at the Purchaser’s expense
to the authorized location. A written statement describing the nature of
the defect, the date of purchase, the place of purchase, and the Purchaser’s
name, address and telephone number should also be included.
If upon the Warrantor’s examination, the defect proves to be the result
of defective material or workmanship, the equipment will be repaired or
replaced at the Warrantor’s option without charge, and returned to the
Purchaser at the Warrantor’s expense. (Contiguous US and Canada only)
No refund of the purchase price will be granted to the Purchaser, unless
the Warrantor is unable to remedy the defect after having a reasonable
number of opportunities to do so. Warranty service shall be performed only
by the Warrantor. Any attempt to remedy the defect by anyone other than
the Warrantor shall render this warranty void. There shall be no warranty
for defects or damages caused by faulty installation or hook-up, abuse or
misuse of the equipment including exposure to excessive heat, salt or fresh
water spray, or water immersion.
No other express warranty is hereby given and there are no warranties
which extend beyond those described herein. This warranty is expressly in
lieu of any other expressed or implied warranties, including any implied
warranty of merchantability, tness for the ordinary purposes for which
such goods are used, or tness for a particular purpose, or any other obli-
gations on the part of the Warrantor or its employees and representatives.
There shall be no responsibility or liability whatsoever on the part of the
Warrantor or its employees and representatives for injury to any persons,
or damage to person or persons, or damage to property, or loss of income
or prot, or any other consequential or resulting damage which may be
claimed to have been incurred through the use or sale of the equipment,
including any possible failure of malfunction of the equipment, or part
thereof. The Warrantor assumes no liability for incidental or consequential
damages of any kind.
Samlex America Inc. (the “Warrantor”)
www.samlexamerica.com

Contact
Information
Toll Free Numbers
Ph: 1 800 561 5885
Fax: [phone]
Local Numbers
Ph: 604 525 3836
Fax: [phone]
Website
www.samlexamerica.com
USA Shipping Warehouses
Kent, WA
Plymouth, MI
Canadian Shipping Warehouse
Delta, BC
Email purchase orders to
[email protected]
11006-SMC-20-1017

Régulateur
de Charge
Solaire
SMC-20
Veuillez
consulter ce
manuel avant
d'utiliser votre
régulateur de
Charge Solaire
Guide
d'utilisation

2 | SAMLEX AMERICA INC.
GUIDE D'UTILISATION | Indice
SECTION 1
Sécurité ....................................................................................3
SECTION 2
Description .................................................................................. 5
SECTION 3
Installation ................................................................................... 7
SECTION 4
Fonctionnement............................................................................ 11
SECTION 5
Entretien ................................................................................. 11
SECTION 6
Erreurs et Résolution ....................................................................... 13
SECTION 7
Caractéristiques Techniques ............................................................ 14
SECTION 8
Garantie .................................................................................. 15

SAMLEX AMERICA INC. | 3
SECTION 1 | Sécurité
CONSIGNES DE SÉCURITÉ IMPORTANTES
À PROPOS DE CE GUIDE D’UTILISATION
Ce guide d'utilisation fait partie intégrante du produit.
Veuillez lire attentivement le guide avant utilisation, Conservez-le à portée
de la main pendant la durée de vie du produit, et transmettez-le à tout
utilisateur ultérieur.
VALIDITÉ
Le présent manuel d’utilisation décrit les fonctions, l’installation,
l'utilisation et l'entre-tien du régulateur de charge solaire.
GROUPE CIBLE
Ce manuel d’utilisation s’adresse aux clients naux. Adressez-vous à un
expert profes-sionnel en cas de doutes.
EXPLICATION DES SYMBOLES
Les consignes de sécurité sont symbolisées dans la manière suivante :
!ADVERTISSEMENT!
Type, cause et conséquences du risque ! Mesures destinées à
éviter le risque encouru. Les indications de l’installation pour un
fonctionnement en toute sécurité sont imprimées en
aractères gras.
SÉCURITÉ
UTILISATION CONFORME
Le régulateur de charge solaire n'est utilisé dans des systèmes PV que pour
charger ou régler des batteries au plomb conformément aux dispositions de
ce manuel, ainsi qu’aux instructions de charge du fabricant de batteries.
UTILISATION NON CONFORME
Ne raccordez aucune autre source d’énergie que des générateurs solaires au
régulateur de charge. Ne raccordez pas d’appareils branchés au réseau, ni
de groupes diesel électrogènes ou de générateurs éoliens. Ne raccordez pas
d' équipements de mesurage endommagés ou défectueux.
CONSIGNES DE SÉCURITÉ GÉNÉRALES
- Respectez les consignes générales et nationales en matière de sécurité
et de prévention des accidents.
- Modiez ni enlevez à aucun moment les plaques signalétiques et
d’identication fournies par le fabricant.
- Gardez les enfants éloignés du système PV.
- N’ouvrez pas l’appareil.

4 | SAMLEX AMERICA INC.
SECTION 1 | Sécurité
RISQUES RÉSIDUELS
Risque d’incendie et d’explosion:
- N’utilisez pas le régulateur de charge solaire dans un environnement
chargé de poussière, à proximité de produits solvants, où des gaz et
vapeurs inammables sont dégagés.
- N’allumez pas de feu, ni de lumière ou d’étincelles à proximité
des batteries.
- Ventilez sufsamment la pièce.
- Contrôlez régulièrement le chargement.
- Respectez les consignes relatives au chargement données par le
fabricant de batteries.
ACIDE DE BATTERIE
- Traitez immédiatement les projections d’acide sur la peau ou les
vêtements avec de la lessive et rincez abondamment.
- Rincez immédiatement les projections d’acide à hauteur des yeux
avec une grande quantité d’eau. Consultez un médecin.
COMPORTEMENT À ADOPTER EN CAS
DE DYSFONCTIONNEMENTS
- Il est dangereux d’utiliser le régulateur de charge solaire dans
les cas suivants :
- Le régulateur de charge solaire indique aucun fonctionnement.
- Le régulateur de charge solaire ou le câble raccordé est
visiblement endommagé.
- En cas de dégagement de la fumée ou d’inltration de uides.
- Si certaines pièces sont détachées ou desserrées.
- Dans ce cas précis, débranchez immédiatement le régulateur de
charge solaire du panneau solaire et de la batterie.