Frequently asked questions


How do I extend my product warranty?

Allimex Green Power does not offer warranty extensions.
You can request this directly from the manufacturer. 

How do I know around what time to expect my delivery?

You can provide us with a phone number at or by calling 011/460070 so that our driver will notify you an hour / half hour in advance. 

How do I know what the transportation costs will be?

The transport price depends on several factors. Is delivery possible with a parcel service or is delivery by truck required because of the weight or dimensions of the items? Do we need to provide a cage loader? Best way is to contact our customer service at 011/460070 or send an email to


What grants and subsidies can I get in Flanders?

Anyone submitting a grant application after 31 March 2021 will be entered into the new scheme:

  • the max grant is EUR 2550:

    • EUR 300/kWh for the first 6 kWh

    • EUR 250/kWh from 6 to 9 kWh

The total grant can never exceed 40% of the overall investment.

For a full overview:

How does a home battery work?

A home battery system generally consists of PV panels, a battery, an inverter and an electricity meter. The PV panels convert sunlight into electricity or, more specifically, DC power. In order to power your household appliances and lights, the inverter turns this into AC power. The battery can be installed in either the DC or AC section of the system.

Why do I need an inverter?

The inverter is one of the most important components of a home battery system. It’s connected to your meter box, home battery system and, if you have them, to your solar panels. Through your meter box, the inverter makes sure that the power generated by your PV panels or supplied by your home battery can actually be used by the appliances in your home. The inverter can also be used to store grid power or power generated by PV panels in the battery.  The whole system is fully automated.

Are all inverters compatible with all batteries?

Sadly, no. If you already have a solar system, you should first check whether your inverter is “battery-ready”.  If you don’t have a “bidirectional” inverter, you can choose to install an additional inverter or replace your current inverter with a hybrid one.

How do I choose the right battery?

Which home battery is best for you depends on your energy consumption and the size of your solar system. How much capacity your home battery should have depends on your consumption profile, your inverter, the appliances you use at home and how much power you can generate locally. Installing your battery and PV panels at the same time is a great way to make sure that your system is configured optimally.

What is the payback period for a home battery system?

The payback period for a home battery system depends on your specific situation. Important factors to consider include:

  • Do you already have solar panels?
  • What VAT rate applies to you? 6% or 21%?
  • What do you currently pay for your electricity?
  • Are you entitled to grants and are you interested in applying for one?
  • The quality of your preferred battery system.

Typically, we see payback periods of 8 to 10 years.

However, home batteries have a wide range of benefits, so payback time isn’t the only metric to look at.

  • With a home battery, you won’t be affected by future increases in electricity rates as much. A valid argument if you consider that electricity rates have increased by an average of 6% a year over the past 10 years!

Besides, installing a home battery means doing your bit to reduce carbon emissions and counteract global warming. Rather than contributing to the problem, you’ll become part of the solution!

FIREFLY - Can I go completely off grid?

You could, but it’s not a financially interesting option. It would require a major investment, and you still wouldn’t be able to carry over solar energy from summer to winter.

The Firefly has a 3kW Electricity Power Supply output on its inverter, and if your installer wired this output to several circuits in your home, these circuits can remain live in the event of a power cut. Within 10 msec, this EPS output will switch from the grid to the battery in the event of an outage.

Will my PV panels continue to work during a power outage?

As long as the battery is active, your PV panels will stay on and power the circuits wired to the EPS output, as well as charging the battery in case of overproduction.

Is the FIREFLY noisy?

The FIREFLY is not actively cooled, as it does not need a fan thanks to its robust design and high efficiency.

Does installing a FIREFLY battery in my home pose a fire risk?

Any electrical device or battery can catch fire in the event of a short circuit or technical defect.

  • The designers of the FIREFLY opted for LiFePO4 battery technology to mitigate this risk and make sure that the battery can simply be extinguished if it does catch fire (unlike Li-ion batteries).
  • Thanks to the battery’s aluminium housing, dedicated pressure relief valves for each module, 240 Wh modules (which means you only need 4 modules for 1 kWh storage) and sound temperature and voltage monitoring, the FIREFLY is a very safe system.
Will my insurance premium go up if I invest in a battery system (BE)?

It usually won’t in Belgium, but you are obliged to notify your insurer.

What is the service life of the FIREFLY battery?

Our FIREFLY can be discharged down to 10%. Discharging the battery by 90% and then recharging it only constitutes 1 cycle. With our residual capacity of 85% after 5,000 to 6,000 cycles, this amounts to a useful life of around 15 years. The battery’s overall lifespan, with a residual capacity of 70%, is probably around 20 years.

Can I expand my FIREFLY battery if necessary?

Yes, within a few months of purchase and installation, the battery can be easily modularised into blocks of 3.6 kWh to a total of 25.2 kWh. If you want to expand after a few years, we’ll remove your used batteries and refund you their residual value. If possible, we’ll expand your current battery with a used battery with the same number of operating hours to prevent internal currents and efficiency loss.

What warranty do you offer on FIREFLY?

We offer a 10-year warranty on the entire system.

Can I install the battery outside?

Preferably not, and certainly not in the rain or anywhere where the battery can be exposed to water. Large temperature fluctuations are also not recommended, as condensation can form inside the inverter housing.

Can I wall-mount my FIREFLY?

This isn’t recommended. The battery is modular, which means it can be expanded in the future. This won’t be as easy if you’ve wall-mounted your system.  Besides, a single battery module weighs about 30 kilograms.

What is the maximum distance between the battery and the inverter?

For the FIREFLY, the max. distance between the inverter connector and the battery connector is approximately 6 metres, while it’s about 10 metres for the LUNA. This minimises losses and stops the cable getting too hot.

Can I install the FIREFLY in the Netherlands? Will I get approval?

Certainly. All our systems are Synergrid-approved, which is just about the strictest scheme in Europe. From 2021, the Netherlands will probably also adopt the Synergrid label as a requirement.

What about capacity rates?

Capacity rates are coming, which will make peak loads more expensive. Although the exact capacity rates are yet to be announced, the FIREFLY supports peak shaving, which will shorten the system’s payback time.

FIREFLY: Does capacity need to be reserved in the battery for the backup function to work?

You do not need to reserve capacity for the backup function to work. In the event of a grid failure, the remaining battery capacity will serve as a backup. If there is still PV power stored in the hybrid inverter, it will continue to supply energy whilst storing any excess energy in the battery.

FIRELFY: Can you add the battery and inverter to an existing installation?

You can wire our system in parallel to existing systems consisting of PV panels and an inverter. However, you will not be able to see how much energy is generated and used by the PV system in the app.

Charging stations

Do your charging stations take the generated PV power into account?

They do not take the generated PV power into account, but do take grid injection into account. The Home module takes grid injection by PV panels in Eco mode into account. This will prompt the home to switch to a lower charging setting (6A) and accommodate for the injection detected by the phase clip.

Do your systems have active load balancing?

All our systems are available with load balancing, except the Mobile. This application can be configured in various different ways at the installer’s discretion, depending on the project in question.

Are your charging stations compatible with badges by other brands?

Yes, all our industrial charging stations can be opened to the public, so that users can also scan public badges to charge their vehicles. Please note that this is only possible if the stations are made publicly accessible.

What about multiple charging stations at a private residence?

When installing multiple charging stations at a private residence, we will look at incoming power. Depending on the situation, we’ll opt for several separate wall boxes (without a fixed cable) or several Home modules (with a fixed cable).

Which breakers do I need for a charging point?

The Home has an internal 6 mA DC breaker. It requires a type A differential (40A 30mA) and a 32A circuit breaker. Our Advanced and Cluster ranges require the same breakers, though they must be three-phase with a 40A 30mA type B (!) differential and a 32A circuit breaker.

Can we easily change the cable?

This is possible, but due to Powerdale's warranty conditions, it will void your current warranty.

Please note that type 2 systems only support type 2.

Which subscriptions do you offer?

The fleet manager can manage all activities of users or drivers in the company on a paid platform. There are two options:

  • Nexxtmove Flex: EUR 6 per month per station.
  • Nexxtmove Business: one-off fee of EUR 300 per station.


What is an inverter for?

An inverter converts the direct current generated by PV panels into alternating current.

Solar panels

What material are PV panels made of?

Panels are made from an element called silicon. Silicon crystals come as POLY and MONO cells.

POLY cells

  • Cells composed of several small residual pieces.

MONO cells

  • Cells that come from the same batch of silicon and that have therefore not been mixed.
What does Kilowatts peak mean?

Used to denote the Wattage of a system.

  • 1 kWp = 1000Wp
What does Kilowatts hour mean?

Unit to measure energy generation.

Mounting systems

For which types of roofs do you have mounting solutions?

We really do have the right solution for every roof. We distinguish between pitched roofs, flat roofs and ground-mounted systems.

  • For pitched roofs, we have special systems with screws or handy sliding systems.
    We also have custom solutions for specific types of roofing:
    • Steel deck
    • Zinc
    • Tiles
    • Slates
  • For flat roofs:
    • Bitumen
    • EPDM
    • PVC
    • Gravel