Hybrid, Off-Grid or Grid-Tie Inverter: Which Do You Need?

Please note: this guide was written with the help of AI and may contain mistakes or outdated information. It is general information only. Always do your own research (DYOR): check product specifications with the manufacturer, and use a qualified professional for any electrical, security or gate installation.

Solar inverters look similar from the outside, but the three main types do very different jobs. Choosing the wrong one is a common and expensive mistake. Here is how they differ.

Grid-tie inverters

A grid-tie inverter converts the power from your solar panels into AC electricity and feeds it into your home and the grid. It is the simplest and usually cheapest option, but it has no battery, and by design it switches off when the grid goes down. That means a grid-tie system alone will not keep the lights on during load shedding.

Best for: reducing your electricity bill where outages are not a concern, or businesses that only run in the daytime.

Off-grid inverters

An off-grid (stand-alone) inverter runs your home from batteries and solar and does not rely on the grid at all. Some models can also use the grid or a generator as a backup charger. They are a good fit where there is no grid, such as farms, cabins and remote properties.

Best for: sites with no grid, or owners who want full independence.

Hybrid inverters

A hybrid inverter combines both: it takes power from the panels, charges the battery, supplies the house, and uses the grid as a backup. When the grid fails, it switches over to the battery. For most South African homes dealing with load shedding, this is the most useful type.

Best for: homes and small businesses that want backup during load shedding and lower bills, with the option to add batteries and panels later.

Quick comparison

• Works during load shedding: hybrid yes, off-grid yes, grid-tie no.
• Needs a battery: hybrid and off-grid yes, grid-tie no.
• Uses the grid: hybrid and grid-tie yes, off-grid optional.

Other things to check

• Single or three phase: match the inverter to your property’s supply.
• Battery voltage: inverters are built for specific battery voltages, so check the two are compatible.
• Size: work out your peak load first. See how to size an inverter and battery.
• Installation and CoC: use a qualified installer and ask for the Certificate of Compliance.

Browse the range

See all inverters, then pair them with solar batteries and solar panels. Charging a battery from another source? Look at charge controllers.

AI-assisted content. Please do your own research (DYOR) before you buy or install.