Off-Grid Inverters

Sunshine Series

The Sunshine 3/5KW is a versatile unit, serving as an inverter, solar charger, and battery charger all in one, providing seamless power supply. It boasts a large LCD screen and four soft buttons, simplifying system configuration. Users can easily adjust settings like battery charging current, AC/solar charger priority, and suitable input voltage based on their unique needs. An optional Wi-Fi feature enhances ease of communication, enabling remote system monitoring and firmware updates.

Not Sure which suit you the best?

Contact us and we will help you.

Off-grid Solar Systems

Benefits of Off-Grid Solar Systems


Can be installed where there is no access to the utility grid

Off-grid solar systems can be cheaper than extending power lines in certain remote areas. Consider off-grid if you’re more than 100 yards from the grid. The costs of overhead transmission lines range from $174,000 per mile (for rural construction) to $11,000,000 per mile (for urban construction).


Become energy self-sufficient

Living off the grid and being self-sufficient feels good. For some people, this feeling is worth more than saving money.
Energy self-sufficiency is also a form of security. Power failures on the utility grid do not affect off-grid solar systems.
On the flip side, batteries can only store a certain amount of energy, and during cloudy times, being connected to the grid is actually where the security is. You should install a backup generator to be prepared for these kinds of situations.

Equipment for Off-Grid Solar Systems

Solar Charge Controller

Solar charge controllers are also known as charge regulators, or just battery regulators. The last term is probably the best to describe what this device actually does: solar battery chargers limit the rate of current being delivered to the battery bank, and protect the batteries from overcharging.
Good charge controllers are crucial for keeping the batteries healthy, which ensures the lifetime of a battery bank is maximized. If you have a battery-based inverter, chances are that the charge controller is integrated.

Battery Bank

Without a battery bank (or a generator), it’ll be lights out by sunset. A battery bank is essentially a group of batteries wired together.

DC Disconnect Switch

AC and DC safety disconnects are required for all solar systems.
For off-grid solar systems, one additional DC disconnect is installed between the battery bank and the off-grid inverter. It is used to switch off the current flowing between these components. This is important for maintenance, troubleshooting and protection against electrical fires.

Off-Grid Inverter

There’s no need for an inverter if you`re only setting up solar panels for your boat, your RV, or something else that runs on DC current. You will need an inverter to convert DC to AC for all other electrical appliances.
Off-grid inverters do not have to match phase with the utility sine wave as opposed to grid-tie inverters. Electrical current flows from the solar panels through the solar charge controller and the bank battery bank, before it is finally converted into AC by the off-grid inverter.

Backup Generator

It takes a lot of money and big batteries to prepare for several consecutive days without the sun shining (or access to the grid). This is where backup generators come in. In most cases, installing a backup generator that runs on diesel is a better choice than investing in an oversized battery bank that seldom gets to operate at its full potential. Generators can run on propane, petroleum, gasoline, and many other fuel types.
Backup generators typically output AC, which can be sent through the inverter for direct use, or it can be converted into DC for battery storage.

SUNSHINE Off-grid Inverter Installation

Selecting where to install

– Do not mount the inverter on flammable construction materials.
– Mount on a solid surface
– Install this inverter at eye level in order to allow the LCD display to be read at all times.
– For proper air circulation to dissipate heat, allow a clearance of approx. 20 cm to the side and approx. 50 cm above and below the unit.
– The ambient temperature should be between 0°C and 55°C to ensure optimal operation.
– The recommended installation position is to be adhered to the wall vertically.
– Be sure to keep other objects and surfaces as shown in the diagram to guarantee sufficient heat dissipation and to have enough space for removing wires.

Battery Connection

For safety operation and regulation compliance, it’s requested to install a separate DC over-current protector or disconnect device between battery and inverter. It may not be requested to have a disconnect device in some applications, however, it’s still requested to have over-current protection installed.
It’s very important for system safety and efficient operation to use appropriate cable for battery connection.
Insert the battery wires flatly into battery connectors of inverter and make sure the bolts are tightened. Make sure polarity at both the battery and the inverter is correctly connected and conductors are tightly screwed into the battery terminals.

AC Input/Output Connection

Before connecting to AC input power source, install a separate AC breaker between inverter and AC input power source. This will ensure the inverter can be securely disconnected during maintenance and fully protected from over current of AC input. The recommended spec of AC breaker is 32A for 3KW and 50A for 5KW.
There are two terminal blocks with “IN” and “OUT” markings. Please do NOT mis-connect input and output connectors.

PV Module Selection

When selecting proper PV modules, please be sure to consider below parameters:
– Open circuit Voltage (Voc) of PV modules not exceeds max. PV array open circuit voltage of inverter.
– Open circuit Voltage (Voc) of PV modules should be higher than min. battery voltage.

Final Assembly

After connecting all wirings, put bottom cover back by screwing two screws.

APP monitor/control

Scan the QR code, download APP and installed from APP store or web site, and Refer to Installation Guideline to set up network and registering. The inverter status would be shown by mobile phone APP.