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3.1 Product Identification
Each solar panel has three labels providing the following information:
1. Nameplate. The name plate describes the product type, peak power, max. power point current,
max. power point voltage, open circuit voltage, short circuit current, as measured under standard
test conditions, certification marks, the maximum system voltage etc.
2. Current Classes. Solar panels are divided into three classes according to the maximum power
current: 1, 2 or 3 (3 means the highest current). This class is marked as a number on the pallets of
the solar panels. To achieve an optimal performance of the solar panels, it is recommended to only
connect solar panels with the same current class in a string.
3. Barcode: Each individual module has a unique serial number which is permanently attached to the
interior of the Modules and visible on the top front of the Module. The serial number has 12 digits.
From 1st to 2nd digits are the solar cell size code, and the 3rd and 4th are the corrected year code,
from 5th and 6th are the corrected month codes, digit 7 is a product specific optional number and
the numbers 8 to 12 show the serial number of a module. For example, 133414000001 means the
Module was assembled and tested in the January of 2021.
3.2 General Safety
TommaTech solar panels are designed to meet the requirements of IEC61215 and IEC61730, PV
module classification: Class II. Solar modules in this class may be used in systems that are operating
above 50VDC or 240W, where general access is anticipated.
When Solarmodules are mounted on rooftops, the roof must have a fire-resistant covering suitable for
this application. Rooftop PV systems should only be installed on roofs that can handle the additional
weight of al l PV system components, which has to be approved by a certified building specialist
or engineer through a structural analysis.
For your own safety, do not attempt to work on a rooftop until safety precautions have been identified
and taken including without limitation fall protection measures, ladders or stairways, and personal
protection equipment.
Foryourown safety, donotinstallorhandleModulesunderadverseconditions,includingwithout limitation
strong or gusty winds, and wet or frosted roof surfaces.
3.3 Electrical Safety
Photovoltaic modules produce DC electricity when exposed to light and therefore can produce an
electrical shock or burn. Please note that DC voltage of 30 Volts or higher is potentially lethal.
Furthermore, modules produce voltage even when not connected to an electrical circuit or load. Please
use insulated tools and rubber gloves when working with Modules in sunlight.
Modules have no on/off switch and can be rendered inoperative only by removing them from sunlight,
or by fully covering their front surface with cloth, cardboard, or other completely opaque materials,
or by working with modules face down on a smooth, flat surface.
In order to avoid arcs and electrical shock, please do not disconnect electrical connections under load.
Faulty connections can also result in arcs and electrical shock. Consequently, please keep connectors
dry and clean, and ensure regularly that they are in proper working condition. Never insert metal
objects into the connector or modify them in any way to secure an electrical connection.
To avoid and or water vapor entering which may cause connection and safety issues, the modules
need to be installed and connected once they are taken out from the carton box. Please note that the
pollution from sand, dust and water will result in arcs and electrical shocks of connectors.
Reflection from snow or water can increase sunlight and therefore boost current and power. In
addition, colder temperatures can substantially increase voltage and power.
If the glass or other material is damaged, please wear personal protection equipment and separate
affected modules from the circuit. Work only under dry conditions and use only dry tools. Do not
handle modules when they are wet unless wearing appropriate protective equipment. If you need to
clean solar panels, please follow the cleaning steps as outlinedaaaq in the manual.
