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of Float stage is to offset the power consumption caused by self consumption and small
loads in the whole system, while maintaining full battery storage capacity.
In Float charging stage, loads are able to obtain almost all power from solar panel. If
loads exceed the power, the controller will no longer be able to maintain battery voltage
in Float charging stage. If the battery voltage remains below the Recharge Voltage, the
system will leave Float charging stage and return to Bulk charging stage.
Installation Instructions
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/mm² or less current density in accordance
with Article 690 of the National Electrical Code, NFPA 70.
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