- The difference in one table
- Start with the wire in the street, not the brochure
- What each one actually does all day
- A hybrid on a normal day
- An off-grid inverter on a normal day
- The battery is the real price gap
- Where people get the specification wrong
- A simple way to choose
- Where ShineTong fits
- Related reading
- Frequently asked questions
- Can a hybrid inverter run without the grid?
- Can I connect an off-grid inverter to the utility later?
- Which is cheaper, hybrid or off-grid?
- Do I need a generator with a hybrid inverter?
- Will a hybrid run my air conditioner during a blackout?
- Sources
If the building already has a utility line, you almost certainly need a hybrid inverter, not an off-grid one. An off-grid inverter is the right machine only when there is no grid to connect to, or the quote to bring the grid in costs more than the solar system itself. A hybrid keeps the grid as a backup generator you do not have to fuel. An off-grid inverter-charger is the grid.
The expensive mistake is buying the off-grid unit because it was cheaper, then discovering it cannot be connected safely when the village line arrives two years later. The other mistake is buying a hybrid, calling it "whole-house backup," and then watching the battery flatten in an hour because nobody added up the air conditioner.
Last updated: October 2026. This is a buying decision, not a brand ranking. For who actually builds the off-grid hardware, see the off-grid supplier list. For home hybrids that also export, see the residential inverter list.
The difference in one table
| Hybrid inverter | Off-grid inverter | |
|---|---|---|
| Grid | Connects, syncs, and can export if the utility allows it | No grid connection. A generator is the only AC source |
| When the grid fails | Disconnects from the line, then runs backup loads from the battery | There is no grid to fail. The battery and generator are the supply |
| Battery | Optional on many models. Size it for outages or night-time use | Mandatory. Size it for the days you are willing to run without sun |
| Spare solar | Export, charge the battery, or curtail, in that order of preference | Once the battery is full, extra solar is thrown away |
| Later change of plan | You can add a battery, or run for years without one | You generally replace the inverter if a grid connection appears |
A grid-tied inverter, the ordinary one with no battery port, is a third category. It is cheaper than both, and it switches off completely during an outage. That comparison is covered separately. Do not let a quotation call a grid-tied unit a hybrid because the brochure has a battery icon.
Start with the wire in the street, not the brochure
Three questions settle it.
Is there a grid at the site, today? If the answer is no, and there will not be one, buy an off-grid inverter-charger and a generator input. Cabins, island houses, telecom huts, pumps on a farm track, and boats live here. If the answer is yes, an off-grid inverter is usually the wrong tool, even when the grid is annoying.
Do you need power during an outage, and for which circuits? A hybrid is built for this. It stays synchronised to the grid while the grid is up, and it opens a contactor when the grid disappears so your solar does not energise the repair crew. Backup then runs from the battery on a separate output, or through a backup box. Write down the circuits before you write down the kilowatts: fridge, router, a few lights, and maybe one fan is a different battery from "the whole house including the well pump."
Will you be paid for exported electricity? If the utility has net metering, a feed-in tariff, or even a zero-export rule you can live with, a hybrid can use those rules. An off-grid inverter cannot export, because it was never designed to match the grid's voltage and frequency. Extra solar after the battery is full is simply lost. On a good roof in a net-metering area, that lost energy is the payback.
What each one actually does all day
A hybrid on a normal day
Morning solar goes to the house first. What the house does not use charges the battery. What the battery does not want is exported, if export is allowed, or clipped, if the system is set to zero export. In the evening the house runs from the battery until you hit the reserve you set aside for outages, then the grid takes over. None of that requires the power to go out. The battery is earning its cost on ordinary days, and it is sitting there if the line drops.
During an outage the hybrid must not back-feed the street. That part is not optional. The useful question is what stays on inside the house. Some hybrids back up the whole main board. Many only back up a critical-load sub-board, and a few need an extra gateway before they back up anything at all. Read the single-line diagram in the manual, not the word "UPS" on the box. Also read the transfer time. A figure under about 20 milliseconds will usually keep a computer up. A transfer of half a second will restart the router and the desktop, which is fine for a fridge and a failure for a clinic freezer alarm.
An off-grid inverter on a normal day
There is no normal grid day. The inverter creates the AC waveform from the battery, all day, every day. Solar arrives through a charge controller, either built in or bolted on, and refills the battery. If you boil a kettle larger than the solar coming in, the battery makes up the difference. If a week of cloud arrives, a generator has to. This is why off-grid units from the serious end of the market, such as a Victron Quattro, have two AC inputs and a transfer under 20 milliseconds: one input is the generator, and the inverter has to take the load without a blink when that generator coughs.
The design job is autonomy, not bill savings. People under-size this and then blame the inverter. If the house uses 8 kWh on a modest day and you want two days without sun or a generator, you need roughly 16 kWh of usable battery, before you even apply the reserve you refuse to go below. A hybrid for the same house, asked only to carry 800 W of critical loads for six hours, needs about 4.8 kWh. Those are different products and different budgets. Using the hybrid number on an off-grid site is how the lights go out on the second evening.
The battery is the real price gap
Inverter stickers are a small part of the difference. The battery is the rest.
- Hybrid, backup only. Add up watts times hours for the circuits that must stay on. 800 W for 6 hours is 4.8 kWh. On a 48 V LiFePO4 bank you should not plan to empty it, so buy a bit more than the arithmetic, and keep a reserve the inverter is not allowed to touch. One night of essentials is a common and sensible brief.
- Hybrid, bill shifting. If the night tariff is high, or export pays poorly, the battery has to cover evening use, not just emergencies. That is often two or three times the backup-only pack. Do the tariff maths before you buy the bigger stack. Sometimes export pays enough that the extra battery never returns.
- Off-grid. Size for a dull week, not a sunny Tuesday. Then add a generator and an inverter that will actually charge from it. A cheap high-frequency unit that drops offline when the generator voltage sags is not a generator input. It is a brochure line.
Voltage belongs in the same conversation. Remote sites are still a 48 V world, because a dead module can be isolated and the charge currents are well understood. A 5 kW load at 48 V is a bit over 100 A, so cable size and the DC breaker are part of the inverter choice. High-voltage batteries pair more naturally with grid-tied hybrids in houses. They are a poor default for a site nobody visits for a month.
Sizing a battery and the DC protection around either inverter?
Where people get the specification wrong
Surge. A well pump, a fridge compressor, or a small workshop tool can pull several times its running current for a moment. Transformer-based off-grid inverter-chargers are heavy because they can supply that. A 17 kg hybrid that quotes "twice power for ten seconds" may not start the same pump. If the load list has motors, ask for the overload in seconds, and lean toward the off-grid machines that publish a curve. Weight is a clue: the serious inverter-chargers are the ones you do not hang with two people and a plasterboard anchor.
Pass-through current. A hybrid still has to feed the house from the grid on a wet week. If the pass-through is 30 A and the house draws 40 A at dinner, the inverter is now the bottleneck, solar or not. Off-grid units have the same limit on the generator input. Match it to the main breaker you actually have.
Parallel and three-phase. "Up to 16 units" on a datasheet still has rules about cable length and firmware. A single-phase off-grid inverter will not become a three-phase supply because you bought three of them, unless the manual says they can be phased. Get that sentence in writing before the deposit.
The grid arriving later. This is the one to put in the contract on rural projects. If there is any chance of a utility line within the life of the inverter, do not install a pure off-grid unit as the heart of the building. You will be replacing it, rewiring the board, and throwing away a charge controller arrangement that cannot export. A hybrid set to off-grid mode, with export switched off, is the more expensive purchase and the cheaper decade.
Calling a hybrid an off-grid inverter because it has an off-grid mode. Many hybrids will run a house with no grid present, and some of them do it well. They are still designed as grid products: lighter, shorter surge, battery lists that are finite, and a warranty that assumes an installer who can talk to the manufacturer’s portal. For a staffed house with an occasional week of islanding, that is perfect. For a borehole that must start every morning whether or not the internet is up, buy the inverter-charger.
A simple way to choose
- Grid at the site, no outages you care about, export pays: a plain grid-tied inverter, not either of these.
- Grid at the site, outages you care about, or a night tariff you want to dodge: hybrid, battery sized to the circuits you wrote down.
- Grid at the site but export is forbidden: hybrid again, programmed for zero export. You still want the grid there for dull weeks.
- No grid, and no realistic plan for one: off-grid inverter-charger, battery for dull days, generator that the inverter will accept.
- No grid today, grid possible later: hybrid with export disabled, not a pure off-grid unit.
- Motors, pumps, or a workshop: check surge before brand. An off-grid transformer unit often wins even when a hybrid looks better on efficiency.
Where ShineTong fits
ShineTong does not manufacture hybrid inverters or off-grid inverter-chargers, so we are not a seventh name in that comparison. What fails in these projects, after the inverter brand has been argued to death, is the DC side: cable sized for a brochure instead of for 100 A, a breaker from a grid-tied catalogue, and a battery nobody checked against the inverter’s protocol list.
We supply LiFePO4 storage for grid-tied and off-grid banks, storage accessories, DC breakers, isolators and cable. Distributors usually buy the inverter-charger from Victron, Deye, Schneider or whoever their market already trusts, and ask us to put the battery modules and the protection in the same inspected shipment. Send the inverter model and the battery voltage. If the BMS list does not include what we can ship, we will say so before you pay for freight.
Pairing storage with a hybrid or an off-grid inverter?
Tell us the inverter model, the battery voltage and the destination. We reply with options, documents and lead times. No public price lists.
Related reading
- Top 5 off-grid storage inverter suppliers
- Top 5 residential PV inverter manufacturers
- Global top 10 hybrid inverter manufacturers
- Energy storage
- Hybrid inverter vs a normal grid-tied inverter
Frequently asked questions
Can a hybrid inverter run without the grid?
Yes, if the model has a backup output and a battery with enough charge. During an outage it disconnects from the utility and supplies the backup circuits from the battery and from whatever solar is coming in. It will not keep the whole house running unless those circuits, and the battery, were sized for the whole house. When the battery hits its reserve and the sun is down, the backup stops, even though the inverter is fine.
Can I connect an off-grid inverter to the utility later?
Not safely, and not legally, unless that exact model is also certified as a grid-tied or hybrid inverter. A pure off-grid inverter does not synchronise to the grid and does not provide the anti-islanding protection a utility requires. If a grid connection is even a possibility, buy a hybrid and turn export off. Replacing the inverter later means rewiring, a new permit, and a battery protocol you may have to change as well.
Which is cheaper, hybrid or off-grid?
The inverter itself is the wrong comparison. An off-grid system needs a larger battery, because there is no grid to cover a dull week, and it usually needs a generator. A hybrid system needs a smaller battery if you only want outage cover, but the inverter costs more than a plain grid-tied unit and the switchgear is more complicated. On a site that already has a grid, hybrid is almost always the lower lifetime cost. On a site with no grid, off-grid is the only one that works.
Do I need a generator with a hybrid inverter?
Usually no. The grid is the generator. A generator is worth adding if outages last for days and the battery cannot cover them, or if you are in cyclone or wildfire country and you want a third source. Check that the hybrid actually has a generator port. Some only have a grid port, and a dirty generator waveform will make them drop offline. Off-grid systems should be designed with a generator from the start.
Will a hybrid run my air conditioner during a blackout?
Only if three numbers work at once: the inverter’s backup power is above the air conditioner’s running watts, the surge rating covers the compressor start, and the battery can supply that power for as long as you care about. A 5 kW hybrid with a 5 kWh battery will start some room units and then flatten quickly. If air conditioning is the reason you are buying backup, size the battery in kilowatt-hours, not from the inverter’s kilowatt sticker.
