Is the Indevolt SolidFlex 3000 AC Really 3,000W?

The Indevolt SolidFlex 3000 AC has 3,000W in its name, but the base unit alone doesn't give you that. We break down exactly which modules you need to unlock the full power, and what it costs.

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Colin Kranendonk Published 21 Oct 2026 Leave a comment

Is the Indevolt SolidFlex 3000 AC Really 3,000W?

At a glance

The SolidFlex is modular: a power module with a built-in battery, plus stackable expansion modules in two sizes
How much power you get out depends entirely on how much battery you add, not on the number in the product's name
With no expansion, the base unit discharges 1,000W. The full 3,000W only arrives once you've added enough expansion capacity
There's also a circuit limit: a standard wall socket caps discharge at 800W, whatever modules you've added
Price per kilowatt-hour falls as you add capacity, but the entry price per kWh is on the expensive side
Specs and prices come from the manufacturer and change over time, so check the current figures before you buy

The Indevolt SolidFlex 3000 AC has 3,000W in its name. But if you just buy the base unit, you don’t get 3,000W, you get 1,000W. So what do you actually need to buy to get the full power? Let’s find out.

Is the Indevolt SolidFlex 3000 AC really 3,000W? Breaking down what you need to buy

How the SolidFlex is built

The SolidFlex is modular. The base is the power module, which has a 1.8 kWh battery built in. On top of that, you can stack extra battery modules like Lego blocks. They come in two sizes, 1.8 and 3.6 kWh, and you can add up to five of them. With the big modules, that takes the whole system to around 19.8 kWh.

The two numbers that actually matter

Here’s the part that matters. How much power you get depends on how much battery you add. For this, look at two numbers: discharge power, how much electricity the battery can send to your home at the same moment, and grid charging power, how fast it can fill up from the grid, for example when electricity is cheap.

Setup	Discharge power	Grid charging power
Base unit, no expansion	1,000W	896W
Base unit + 1.8 kWh module	2,000W	1,792W
Base unit + 3.6 kWh (one big or two small modules)	3,000W	2,688W
Base unit + 7.2 kWh expansion	3,000W	3,000W

Why does this matter? Say your home is using 2,000W one evening, that’s an example, not a measurement. With just the base unit, the battery supplies a thousand watts. The other thousand still comes from the grid. You own a battery, but you’re still buying electricity in the evening, often the most expensive time of day.

Choose based on your own numbers, not the number in the product name.

What it actually costs

The base SolidFlex, with its 1.8 kWh of built-in capacity, is expensive per kilowatt-hour, and that’s one of its weaker points. But look what happens when you add capacity: the price per kilowatt-hour keeps falling as you add more, though slowly. The 3,000W in the product name comes with a mid-sized setup, not the cheapest, base-only one. And if you also want to charge from the grid at the full 3,000W, you need the larger 7.2 kWh expansion.

Check current prices before you buy

Prices shift over time and vary by retailer and region. Treat any specific euro figures as illustrative, and always check the manufacturer's current pricing before you buy.

The circuit limit nobody mentions

There’s one more limit: the circuit the battery is connected to. According to the spec sheet, on a standard circuit, the SolidFlex discharges up to 800W. For the full 3,000W, you need a dedicated circuit. So even with all the right modules, a normal wall socket caps you at 800W.

And the rules for plugging a battery into a socket are different in every country. Always check what applies where you live before you install.

Which setup do you actually need?

How much power does your home use at its peak in the evening?

If it's often above 1,000W, the base unit alone will leave you buying from the grid at exactly the moment electricity tends to be most expensive.

How much energy do you use between sunset and sunrise?

That tells you how much battery capacity actually makes sense for your household. Many smart meter apps and energy apps show you both numbers.

Some homes will be fine with the base unit. Others will outgrow it fast. Choose based on your own numbers, not on the number in the product name.

SolidFlex 3000 AC, common questions

Does the Indevolt SolidFlex 3000 AC really deliver 3,000W?

Yes, but only with enough expansion added. The base unit on its own discharges 1,000W. You need 3.6 kWh of expansion (one big module or two small ones) to reach 3,000W of discharge power.

How much can the SolidFlex expand to?

Up to five expansion modules, in 1.8 or 3.6 kWh sizes, taking the whole system to around 19.8 kWh with the larger modules.

Can I get 3,000W through a normal wall socket?

No. A standard circuit caps the SolidFlex at 800W regardless of how many modules you've added. The full 3,000W needs a dedicated circuit.

Is the SolidFlex good value?

The entry price per kilowatt-hour is on the high side, but it falls as you add expansion modules. Whether it's good value depends on how much capacity and power your home actually needs, check current pricing before deciding.

Colin Kranendonk

Video Producer at HomeBattery.com

Covers home battery systems and energy storage trends through video for HomeBattery.com. Helping readers get the full picture quickly with clear, practical video guides.

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