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Inverters

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Deye off-grid inverter

Off-Grid Inverters

Off-grid inverters for battery-backed solar systems, suited to sites without stable utility power.

Hybrid solar inverter. Conceptual image.

Hybrid Inverters

Hybrid inverters that combine grid, solar and battery operation for homes and businesses.

Grid-tied inverter. Conceptual image.

On-Grid Inverters

Grid-tied inverters for residential, commercial and industrial solar plants without battery storage.

Choosing an inverter

Off-grid, hybrid, on-grid — the difference at a glance

An on-grid inverter runs only while the grid is present and has no battery: everything the array produces goes to the grid. During an outage it is off. It suits an owner whose aim is export or a lower bill, not backup power.

An off-grid inverter runs independently of the grid and always needs a battery — for sites the grid does not reach, or where outages are long and frequent.

A hybrid inverter does both: it works with the grid, charges the battery from the grid or the sun, and holds the selected loads through an outage. It costs more than either of the others, but it is the only one that keeps both routes open.

Rated power versus surge power

Rated power is the load an inverter can supply continuously. Surge power is the current it will tolerate for a few seconds — and that is the figure that decides whether the system holds when motors start.

Water pumps, air conditioning, compressors and lifts draw several times their rated current at the moment of starting. An inverter chosen purely by adding up rated loads looks sufficient and in practice cuts out when the first motor runs. Correct sizing starts from peak simultaneous load plus the inrush of the heaviest motor.

Single-phase or three-phase

This choice is usually made for you: your connection and your loads decide it. Ordinary homes are single-phase; lifts, large pumps, cold storage and production lines are three-phase.

Where only some loads are three-phase, it is sometimes possible to separate the single-phase critical loads and cover them with a smaller system — which brings the cost down noticeably. That is a decision made during a site survey, not from a catalogue.

What usually gets overlooked

Three specifications drop out of a quick comparison between two inverters and reveal themselves later. First, the MPPT input voltage window: it decides how many panels you can put in series in one string, and panel voltage rises in winter cold.

Second, maximum battery charge current: an inverter with ample output power may still charge a large battery slowly. Third, communication compatibility with the battery's BMS, without which the inverter does not know the battery's real state of charge.

Frequently asked questions

What inverter power do I need?

Start from the sum of the loads that genuinely run at the same time, not from every appliance in the house. Then add the starting current of the heaviest motor — pump, air conditioner, fridge — because that is the moment the system is under strain. Our free consultation runs exactly this calculation from your load list.

In practice, how do hybrid and off-grid inverters differ?

Both have a battery and both work during an outage. The difference is their relationship with the grid: a hybrid can also charge the battery from the mains and work alongside the grid, while an off-grid system is designed to stand alone and relies on the sun — and a generator where needed. For a home that has mains power but also outages, hybrid is usually the right choice.

Does an inverter work without a battery?

An on-grid inverter does, and is built for exactly that — but it shuts down during an outage and provides no backup. Hybrid inverters can generally be commissioned without a battery too, but then they do an on-grid inverter's job; if backup power is the goal, the battery is not an optional part of the system.

Can two inverters be paralleled?

Many models can be paralleled, and that is how system power grows later without discarding the original unit. The capability is not universal, though — it depends on the model and firmware version. If you think you may increase system power later, choose a model that supports it from the start.

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