User Manual

1.3 Product Classification

Model Picture

Display

MY20

MY30

MY40

LED Indicators: PV & battery & load working status

Buttons: View or set the parameters or clear the error information.

LCD: PV display: voltage/current /generated energy/power

Battery display: voltage/current/temperature/capacity

Load display: voltage/current/power/consumed energy/load

working mode.

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).

2. Installation Instructions

2.1 General Installation Notes

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