5
2 Installation
2.1 Attentions
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.
The controller can work with lead-acid battery and lithium battery within its control scope.
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 solar system, controller could be suitable for various types of PV
modules and maximize converting solar energy into electrical energy. According to the open circuit
