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Installation
Warning
• Be very careful when installing the batteries, especially flooded lead-acid battery.
Please wear eye protection, and have fresh water available to rinse if 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.
• For outdoor installation, keep out of the direct sunshine and rain infiltration.
• Loose connections and corroded wires may result in high heat that can melt wire insula-
tion, burn surrounding materials, or even cause fire. Ensure tight connections and use
cable clamps to secure cables and prevent them from swaying in mobile application.
• 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 battery bank.
• Select the system connection cables according to the current density no greater than
5A/mm
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 voltage (Voc) and the maximum power point voltage
(Vmpp) of the MPPT controller, the series number of different types PV modules
can be calculated. The below table is for reference only.
DR2210/3210N-DDB/DDS:
NOTE: The above parameter values are calculated under standard test conditions
(STC): Irradiance 1000W/m
2
, Module Temperature 250C, Air Mass 1.5.)
System
voltage
36cell
Voc<23V
48cell
Voc<31V
54cell
Voc<34V
60cell
Voc<38V
Max.
Best
Max.
Best
Max.
Best
Max.
Best
12V
4
2
2
1
2
1
2
1
24V
4
3
2
2
2
2
2
2
System
voltage
72cell Voc<46V
96cell Voc<62V
Thin-Film module
Voc>80V
Max.
Best
Max.
Best
Max.
Best
12V
2
1
1
1
1
1
24V
2
1
1
1
1
1
