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2.
Installation Instructions
2.1
General Installation Notes
Please read the entire installation instructions to get familiar with the installation steps before
installation.
Be very careful when installing the batteries, especially flooded lead-acid battery. Please wear eye
protection, and have fresh water available to wash and clean any contact with battery acid.
Keep the battery away from any metal objects, which may cause short circuit of the battery.
Explosive battery gases may come out from the battery during charging, so make sure ventilation
condition is good.
Ventilation is highly recommended if mounted in an enclosure. Never install the controller in a sealed
enclosure with flooded batteries! Battery fumes from vented batteries will corrode and destroy the
controller circuits.
Loose power connections and corroded wires may result in high heat that can melt wire insulation, burn
surrounding materials, or even cause fire. Ensure tight connections and use cable clamps to secure cables
and prevent them from swaying in mobile applications.
Lead-acid battery and lithium battery are recommended, other kinds please refer to the battery
manufacturer.
Battery connection may be wired to one battery or a bank of batteries. The following instructions refer to
a singular battery, but it is implied that the battery connection can be made to either one battery or a
group of batteries in a battery bank.
Multiple same models of controllers can be installed in parallel on the same battery bank to achieve
higher charging current. Each controller must have its own solar module(s).
Select the system cables according to 5A/mm
2
or less current density in accordance with Article 690 of
the National Electrical Code, NFPA 70.
2.2
PV Array Requirements
(1) Serial connection (string) of PV modules
As the core component of PV system, controller could be suitable for various types of PV modules and
maximize converting solar energy into electrical energy. According to the open circuit voltage (V
oc
) and the
maximum power point voltage (V
Mpp
) of the MPPT controller, the series number of different types PV
modules can be calculated. The below table is for reference only.
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