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2Installation Instructions
2.1 General Installation Notes
Before installation, please read through the entire installation instructions to get
familiar with the installation steps.
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.
Gel, Sealed or Flooded batteries are recommended, other kinds please refer to
the battery manufacturer.
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.
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
accordance with Article 690 of the National Electrical Code, NFPA 70.
2.2 PV Array Requirements
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
(V
) of the MPPT controller, the series number of different types PV modules can
Mpp
2
or less current density in
) and the maximum power point voltage
oc
8
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