Last year, we discovered the Fossibot F3600, apowerstation that impressed us with its power and autonomy, as it was capable of powering an entire dwelling without a problem, all for an extremely aggressive price. Its only drawback? The impossibility of increasing its capacity, limited to 3840 Wh. Well, with its new Fossibot F3600 Pro version, the manufacturer comes close to perfection, adding the possibility of adding two extension batteries, a Wifi link with a mobile application, and much more.
As we've already seen in other tests, these devices are truly practical, whether you're camping, traveling, at work, or as a backup solution at home in the event of a power failure. Today, we're going to take a look at the Fossibot F3600 Pro, which is perfectly suited to this domestic use. With an impressive capacity of up to 11,520 Wh and a power output of 3600 W, capable of handling peaks of up to 7200 W, it's a real power beast. It's just about the biggest battery of its kind I've tested so far! I used it for two months this summer, but it will be even more valuable this winter, whether to cope with frequent power cuts or the infamous Tempo red days, for which tariffs are skyrocketing. Let's discover it together without further ado!
Unpacking the Fossibot F3600 Pro
As soon as you receive the Fossibot F3600 Pro, you're immediately struck by its robust packaging. The battery is carefully packed in a thick cardboard box, with foam inserts to guarantee optimum protection during transport. Its Fossibot FB3840 extension battery benefits from the same treatment. Here I received the Fossibot F3600 Pro with an extension battery. It's also possible to buy it on its own, or in a pack with two extension batteries, which increases its capacity to 11,520 Wh. Here in my configuration, with two batteries, I'm at 7680 Wh, which is already impressive.
This attention to detail ensures that the battery arrives in excellent condition, ready for use. A little tip: open the box from the bottom, and simply remove the packaging from the top, as getting the beast out of its box is a real physical ordeal ;-)
Opening the box reveals several carefully organized components:
- Fossibot F3600 Pro battery: This is of course the centerpiece, imposing in size and weight.
- AC charging cable: Essential for recharging the battery from a wall socket.
- Car charging cable: Convenient for recharging the battery on car journeys.
- XT90 solar charging cable: Indispensable for those wishing to use solar panels.
- User manual: Includes detailed instructions for battery use and maintenance.
- Cable storage bag: A practical addition to keep all cables organized and easily accessible.
- Battery cover: Protects the battery from the elements if required.
- Flashlight: A flashlight with Usb charging cord is included. It has an integrated battery slot.
The Fossibot F3600 Pro is identical to the classic version, except for one detail. Like its big sister, it stands out for its solid, industrial design. It is protected by a reinforced plastic casing, designed to withstand shocks and demanding environments. Despite its 42 kg weight, transport is made easy by leather handles and sturdy castors.
The sturdy wheels and extendable handle allow the battery to be moved like a wheeled suitcase, which is very practical whether the terrain is rough or not.
The solidity of the construction is obvious at first glance. This sturdiness is enhanced by an impeccable finish, with reinforced corners and top-quality materials, ensuring long life.
The main connections are located on the front:
As you can see, the connectivity is particularly rich: three 230V sockets, 4 USB-C ports (including 1 100w port) and 2 USB-A, a cigar-lighter socket, an XT60 socket, and two DC5521 ports! No surprise for those already familiar with the previous version, since it's identical.
As usual, a small switch accompanies each group of sockets, to activate only the sockets you need and thus save battery power.
A feature I particularly like on Fossibot models is the input power adjustment knob, as we've already seen on the Fossibot F2400 and F3600. Thanks to it, input power can be set between 400 and 2200w! At maximum power, the battery can be charged in just 2 hours, which is quite impressive for a battery of this size!
Directly above these connections is a bright LCD display, providing all the essential information, such as battery status, input and output power, and time remaining for charging or discharging.
On the rear of the Fossibot F3600 Pro, we have the sockets for recharging, either on the mains, or via solar panels or even a cigar lighter via the included adapter.
The rear also features an integrated LED light, as well as a slot for the flashlight:
The magnetic flashlight attaches directly to the battery, which is always handy for having a source of light at hand in the event of a power cut.
Unfortunately, recharging still requires a Usb-C cable (included). We'd have liked to see a little evolution here, so that it would recharge automatically when placed on the battery.
On the other hand, it has a headband light to illuminate a wide area, and a flashlight section to illuminate further afield, with three power levels.
The integrated LED lamp is quite bright (3w), but may prove less practical due to its low position.
A major innovation on the rear of this Pro model, however: two sockets for connecting auxiliary batteries:
Up to now, the F3600 Pro has been identical to the first F3600, but here it's the detail that makes all the difference! But more on that later.
Large fans on the sides cool the system. They will only be activated in the event of heavy load or discharge, and will not be heard most of the time.
The top is completely flat, so you can use the battery as a seat or to put things down.
The underside is fitted with sturdy rubber feet to enable the battery to be placed down carefully:
Inside the system are LiFePO4 batteries, renowned for their long life and enhanced safety. They offer over 6,500 charge cycles before dropping to 80% of their initial capacity, which corresponds to around twenty years of daily use with one charge and discharge cycle per day. This is the best that this type of battery can offer today, while many competitors limit themselves to “only” 3500 cycles. As mentioned above, they provide an impressive autonomy of 3840 Wh, and the battery can deliver a power of 3600 W, with peaks of up to 7200 W (useful for power-hungry devices at start-up). This means it can power a wide range of devices, from small appliances to the most energy-hungry household equipment, and even an electric car!
In terms of safety, the Fossibot F3600 Pro is equipped with a battery management system (BMS) and an MPPT charge controller to guarantee safe and efficient use.
This is the main battery. It is accompanied by an FB3840 auxiliary battery, with the same form factor and dimensions as the F3600 Pro.
Its connectivity is simply streamlined, as can be seen on the front with just a control screen, a power button, an XT60 input for solar panels, and a USB-C output.
On the rear, there's just a single socket for connection to the main battery.
The connection cable is supplied with the extension battery, concealed in a box on top of the battery:
As you can see, it's a big cable, which will enable the two batteries to communicate and exchange energy, since it's the main battery that will charge the auxiliary, and it's also through the main battery that electricity will flow back to power the devices, since it's the one with all the connections.
As for the rest, the same system of wheels and retractable handle is used to move it around, because although it's a little lighter than the main battery, it's still heavy to carry.
The Fossibot F3600 Pro in use
Connecting the two batteries is very simple, via the supplied cable:
The system has been designed to place the batteries side by side, with a fairly short cable. However, it is still possible to stack two batteries on top of each other, by placing the auxiliary battery underneath (otherwise the cable is too short):
Not possible with 3, since the second cable will unfortunately be too short. But in my configuration, it takes up less floor space.
Even if I'm not a fan of these big cables that take up space and don't look very good, there are unfortunately no 36 solutions. Even the flagship Ecoflow Delta Pro has to use this type of cable to connect to its auxiliary batteries. This is the price to pay for doubled autonomy, or even tripled autonomy if a second auxiliary battery is connected.
From the moment the auxiliary battery is connected to the main battery, they become one and the same battery. Switch on the F3600 Pro, and its extension battery lights up simultaneously. Recharge the F3600 Pro, and both batteries are recharged identically. An important detail, however: charging capacity is halved. If the F3600 Pro is set to 2000w input, for example, it will take 1000w for itself, and send 1000w to the auxiliary battery. Logical, but worth pointing out for those who might think that both batteries will charge at 2000w each.
One of the F3600 Pro's major assets is its fast recharging capacity. Thanks to bi-directional inverter technology, it can recharge in just 1.5 hours with a combination of solar panels and an AC source, or in 2 hours with a single 2200W AC source (double that, of course, with an auxiliary battery). This rapid recharging is particularly valuable on extended camping trips or in the event of an emergency at home, where every minute counts. In an outdoor test this summer, the battery reached 100% charge in less than 2 hours with solar panels providing 2000 W, a remarkable performance for a battery of this capacity. It also accepts up to 2000 W of solar power, with a voltage of between 12 V and 160 V (20 A-25 A). Although the auxiliary battery cannot be connected to the mains on its own, it can also be connected to solar panels.
The ability to reduce charging power can also be very practical. Not only does it make charging quieter, but it also allows you to capture surplus solar energy. At home, for example, with my solar stations, I sometimes have a surplus of production. If I have a surplus of 600 W, I set the Fossibot to 600 W input, which enables it to recharge free of charge by absorbing this surplus. By the way, as I explained in this guide, I use a connected plug to automatically recharge these batteries when I have a surplus of solar production, enabling me to store free electricity.
The Fossibot F3600 stands out for its ability to power a wide variety of devices. I tested it in a number of situations, from small electronic devices such as smartphones and laptops, to more power-hungry equipment such as microwaves and drills. Each time, it provided a stable power supply, with no sign of overload. What's more, it remains very quiet, its fans only really kicking in when power exceeds 2000W.
One of the most obvious uses for the Fossibot F3600 Pro is as a backup power source in the event of a power cut. Thanks to its UPS (uninterruptible power supply) function, it can automatically take over in the event of a power failure, ensuring that your essential devices remain powered. For example, during a power cut, the F3600 Pro can keep a freezer running, preventing food loss. It can also power a pellet stove, lights, computers or internet boxes, minimizing disruption to your daily routine.
I had already used the previous model to power my home last winter, plugging it directly into my inverter, enabling me to switch from the EDF grid to the Fossibot F3600 battery. The Pro version, with its doubled or even tripled autonomy, lends itself even more to this, since with 11.5 kWh, it should be possible to last several days (depending on your electricity consumption, of course).
As a reminder, there are two use cases for me:
- In the event of a power cut, which unfortunately happens quite often in my region of Sologne when a tree falls on the power lines, it's not uncommon to be without electricity for several hours, or even several days, depending on the extent of the damage. With this battery, we can continue to live “normally” by powering freezers and refrigerators, without having to use a noisy generator. Working from home, I have to say that between this battery and my Starlink satellite connection, I don't have to worry about power cuts :) And yes, if there's a power cut on the mains, neither the fiber nor the mobile phone will work :/.
- As I subscribe to EDF Tempo to optimize my electricity bill, I use this battery to power the house on red days, which allows me to avoid the exorbitant rates of the EDF network on those days. It recharges easily at night during off-peak hours, and can then take over from 6 a.m. on peak hours. In other words, with one or even two auxiliary batteries (up to 11.5 kWh!), it's possible to live normally without relying on the EDF grid.
It's not possible to feed electricity directly back into the house, as is the case with a Zendure system. But it is possible to connect directly to it the appliances you wish to power or, if like me you have a source inverter, to connect the whole house to it.
Thanks to its pure sine signal, you can connect any device, including the most sensitive ones like computers, without any risk.
The uninterruptible power supply (UPS) function is one of the F3600 Pro's major assets. It enables the battery to take over automatically in the event of a power cut, protecting connected devices such as fridges or computers. The transition to the battery takes place in less than 10 milliseconds, with no perceptible interruption to powered devices.
The Fossibot F3600 Pro battery stands out for its great versatility and outstanding performance, making it ideal for a wide range of uses. Whether for outdoor activities, home needs or professional applications, the F3600 Pro is ready for any situation.
For events at home, such as garden parties or family gatherings, the Fossibot F3600 Pro can provide all the power needed for audio equipment, lighting systems, and even kitchen appliances. For example, it can power an electric barbecue, a projector for outdoor movie nights, and speakers to play music, creating the perfect ambience without having to worry about electrical outlets.
For vanlife and camping enthusiasts, the Fossibot F3600 Pro is a great ally. Thanks to its ability to power a wide range of devices, it's perfect for extended stays in the great outdoors. It can recharge phones, tablets and laptops, as well as power more energy-hungry equipment such as portable fridges, electric hobs and heating systems.
For professionals on construction sites, the Fossibot F3600 Pro is a reliable solution for powering a variety of power tools. With its continuous power of 3600 W and peaks of up to 7200 W, it can easily power drills, electric saws, air compressors and other essential equipment, without the risk of overload.
In emergency situations, the Fossibot F3600 Pro can prove indispensable. For example, during natural disasters or prolonged power failures, it can power essential medical devices such as oxygen concentrators, health monitors or infusion pumps, ensuring continuity of necessary care.
It can also keep communication systems, such as telephones and radios, running, which is essential for staying informed and in contact with emergency services. What's more, it can power security cameras and alarm systems, ensuring continuous protection of your home or workplace.
Given its power, the Fossibot F3600 Pro can also be used to partially charge an electric car. Of course, it won't be able to fully recharge the vehicle, but it will be able to provide enough energy to cover a few kilometers if necessary. Of course, this will depend on the vehicle model and its battery capacity. But a Fossibot F3600 Pro with two auxiliary batteries could recharge almost half my Dacia Spring:p
In short, there are many examples of use. Thanks to its capacity and power, this battery is capable of meeting a wide range of electrical needs.
A new mobile application
Another new feature of the Fossibot F3600 Pro is the arrival of a mobile application! This new version features Bluetooth and WiFi connectivity, totally absent from previous versions. Well, as we've seen, this wasn't a bad thing, since everything could be adjusted directly on the battery, right down to charging power via the rotary knob.
But for some this could have been an obstacle. So now we have the BrgihtEMS application:
After creating an account, the battery is automatically detected via Bluetooth. We configure Wifi, and our battery is integrated into the mobile application.
We can then monitor the charge and discharge levels of the various batteries, and the use of the various sockets.
As the battery is Wifi-connected, it will be possible to activate or deactivate ports remotely if desired. In the case of a second home, this could also be a way of checking the charge level of batteries when they are connected to solar panels. In short, if the application wasn't essential, it does offer some interesting possibilities.
You can also set the maximum/minimum battery charge level, to preserve battery life.
You can also set standby times, update BMS firmware and more.
In short, you'll find all the usual functions for this type of product.
Conclusion
I really liked the Fossibot F3600, but the Pro model makes up for the few shortcomings of the previous version, with the arrival of a mobile application, but above all the possibility of adding two auxiliary batteries. The Fossibot 3600 Pro is the ideal solution for those looking for a reliable power source. Its large capacity, combined with high power and advanced features such as UPS and rapid recharging, makes it a versatile choice for a wide range of needs. Whether for camping, home emergencies or site work, the F3600 Pro delivers exceptional performance. Despite its weight, its many advantages make it a solid investment for long-lasting, secure portable power.
Of course, the extremely aggressive price remains one of its key arguments. At €1599 “only” (applying coupon 8QRAX2AL), i.e. half the price of an Ecoflow Delta Pro, the Fossibot F3600 Pro offers excellent value for money in the field of portable power stations, rivaling leading brands while offering unique features to satisfy the most demanding users. Its ability to provide stable, continuous power, combined with fast recharging and rugged construction, makes it an ideal choice for a variety of applications. If you're looking for autonomy and power, I highly recommend it! It's perfectly possible to start out with the main battery, then buy an auxiliary battery at a later date (currently €1459). For me, this has become my back-up system, especially in winter.
Fossibot F3600 Pro
Several offers are available, in a pack with one or two auxiliary batteries, as well aswith solar panels if you want the whole set:
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