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An off-grid solar system combines three building blocks: solar panels, a battery bank, and a hybrid or off-grid inverter that balances production, storage and consumption in real time.

It makes you independent of two things: the price per kWh and the reliability of the grid. Depending on the setup, there are three families:

• Off-grid — no utility connection at all, full independence at a remote site;
• Hybrid — connected to the grid, with maximized self-consumption and smart use of time-of-use rates;
• Backup — the grid remains the main source, and the batteries take over during an outage.

The right choice isn't a guess: it comes from your actual consumption profile, not a national average. To compare all three architectures in detail, read our off-grid solar guide.

That depends on your actual consumption, not on the capacity printed on the battery. An energy-conscious household at a remote site typically lasts several days; a home with electric heating, far less.

That's exactly what sizing an off-grid solar system calculates: we start from your hour-by-hour consumption data, the solar resource at your location and the number of days of autonomy you need to cover. Three days of reserve and zero acceptable outages don't lead to the same price — better to know before you sign.

Real-world example: our off-grid mountain cabin case study details the reserves a remote mountain site actually needs.

Yes. If you already have a grid-tied solar system, our kits connect to it through AC coupling. No changes to your existing installation are required.

How it works: the storage kit connects to the AC bus, downstream of your current inverter. Your system keeps running exactly as before.

Until now, your solar surplus — the energy produced beyond what you use in the moment — was either exported to the grid for little value or simply lost. It is now captured and stored to power your home in the evening, at night or on cloudy days.

With the Backup option, you turn your existing installation into a true off-grid solar system: if the grid goes down, it switches automatically to island mode and your essential loads stay powered, with no interruption.

Designing and sizing an off-grid solar system is done with measured data, never by guesswork. We use your actual consumption data, from your utility's smart meter, to simulate:

• the self-sufficiency rate reached over the year;
• your annual energy savings, in dollars;
• the return on investment across several power and capacity scenarios.

You walk away with figures you can defend — and the ability to compare two system sizes rather than accept the first one.

Every off-grid solar system includes at least a hybrid and/or off-grid inverter. The two terms are often used interchangeably, and wrongly so: a hybrid inverter is far more sophisticated.

An off-grid inverter is designed to run without the grid, at a remote site. A hybrid inverter natively works alongside the grid: it can export surplus power or, conversely, charge the batteries from the grid when it makes economic sense.

It also adds energy-management features that "standard" battery inverters lack:

• scheduled charging based on time-of-use rates;
• predictive modes (weather forecasts, AI algorithms) to get the most out of your utility rate plan;
• backup switchover and priority-load management.

To learn more about the different types of inverters, our article explains them in detail.

Lithium iron phosphate (LiFePO₄) remains the best balance of energy density, price and lifespan for most off-grid solar systems, and it is cobalt-free.

Nickel-iron makes sense for installations designed to last for decades, with enough space, a suitable budget and acceptance of lower efficiency. Sodium-ion handles cold better and does away with lithium, at the cost of lower energy density.

None of these technologies is "green" in absolute terms — we prefer to talk about lifespan, recyclability and safety, because those can be measured. Our comparison of solar battery technologies puts numbers on these criteria, chemistry by chemistry.

The steady drop in lithium battery prices and the growing reliability of hybrid inverters have changed the equation: investing in an off-grid solar system now pays off in a large number of residential setups.

Several factors, however, weigh heavily on the return on investment:

• your location and solar resource;
• your annual electricity consumption;
• the time-of-day profile of that consumption (day / night, peak / off-peak);
• the compensation your utility pays for exported power, which has dropped sharply in many states.

Some projects pay for themselves in 6 to 7 years, others over about a decade. As a rule of thumb: the higher your electricity use, the faster the payback. Our solar battery page details the capacities and price ranges currently available.

At a remote, off-grid site, yes, within the limits of your electrical skills. Our off-grid solar kits are delivered pre-wired and tested, so installation goes smoothly.

Installing your off-grid solar kit yourself does not affect the manufacturer warranties, and you can still obtain the permit and electrical inspection required by your local authority. Before you start, the best practices and applicable codes are summarized in our guide to solar battery safety and regulations.

As part of our administrative package, we take care of all the paperwork for your project:

• the permit application with your local building department;
• approval of the solar panel layout;
• the final inspection and code compliance of the installation.

So you don't have to juggle zoning, your utility and the inspection authority on your own.

Our partner installers cover all of mainland France, and we work well beyond it. Since 2019, we have delivered and commissioned off-grid solar systems in France's overseas territories, across Europe (Spain, Switzerland, Benelux) and in the United States.

For the most remote locations, we support the project remotely alongside a local installer — a way of working we've practiced for years.