What this Sync Energy Flow all-in-one system covers

The Sync Energy Flow All-in-One Home Energy System is the stacked 3.6kW home energy platform in the Sync Energy Flow range, designed to combine a hybrid inverter and modular battery storage into one coordinated domestic system. In official Sync Energy literature, the 3.6kW all-in-one family is listed as SEF1A36G1, SEF1A36G2 and SEF1A36G3, covering a 3.6kW hybrid inverter with 1, 2 or 3 battery modules. This parent product therefore represents the 3.6kW all-in-one platform that houses those storage options rather than a single fixed-capacity kit.

That makes it a practical choice for projects where the buyer wants a complete, integrated system but still needs freedom over battery quantity. Instead of forcing a one-size-fits-all battery size, the Flow all-in-one platform lets the system start at one module and step up through the official 3.6kW kit options depending on property demand, budget and future plans.

Available 3.6kW all-in-one options

Sync Energy’s current specification sheet lists the following official 3.6kW all-in-one configurations within this family:

• SEF1A36G1: 3.6kW inverter with 1 battery module and approximately 5.12kWh storage
• SEF1A36G2: 3.6kW inverter with 2 battery modules and approximately 10.24kWh storage
• SEF1A36G3: 3.6kW inverter with 3 battery modules and approximately 15.4kWh storage

Those official options are useful because they allow the same core system to suit different styles of home. A smaller property or a homeowner who wants to begin with modest storage can start at the one-battery level, while a busier household with greater evening demand can move up to the two- or three-battery format without changing to a completely different platform.

Who it suits

This system suits single-phase UK homes that want a complete hybrid inverter and battery package rather than piecing together separate products. It is especially relevant for buyers who want to store solar generation, charge from cheaper off-peak electricity periods, reduce peak-time grid reliance and keep the option to expand their storage strategy within the same family of equipment.

It also suits installers who want a neater, more integrated domestic offering. Because the inverter and modular storage are designed to work together as part of the same Flow platform, the result is a more coherent home energy solution with less risk of mismatched components and a clearer upgrade route if the homeowner wants to expand later.

Hybrid inverter performance that matters in practice

Within the current Sync Energy Flow 3.6kW all-in-one documentation, the inverter stage is published with 150% PV oversupply capability, 5.4kW maximum PV input, 550V maximum PV voltage, 80–500V MPPT range, 110–500V full MPPT range, 100V startup voltage and 2 independent MPPT strings. These figures matter because they show that the 3.6kW system is not a restrictive or entry-level-only hybrid package. It gives installers meaningful flexibility when designing the PV side of the installation.

For homeowners, that translates into a system that can make better use of available roof space and support more effective harvesting of solar energy across the day. It is also part of why the Flow system works well as both a new installation and a retrofit-ready home energy platform.

Battery chemistry, cycle life and usable storage

Sync Energy publishes the Flow storage platform as LiFePO4 battery technology with 90% depth of discharge and 6000 cycles. That is a strong combination for residential energy storage because lithium iron phosphate chemistry is widely valued for thermal stability, consistent cycling behaviour and long-term daily-use suitability. The published 51.2V nominal voltage also confirms the battery platform Sync Energy is using within the single-phase Flow system.

In practical terms, this means the buyer is getting a battery platform designed for regular home energy use rather than occasional emergency standby only. Whether the goal is to store daytime solar or charge from lower-cost night-rate electricity, the battery system is intended to work as an active daily part of the home’s energy routine.

Integrated fire suppression, heating and real-world resilience

One of the strongest points in Sync Energy’s current Flow literature is the emphasis on safety and resilience. The all-in-one range is published with integrated fire suppression, integrated heating below 5°C, IP65 enclosure protection and an IK10 impact rating. Together, these features help position the system as a serious domestic energy product rather than a lightly specified storage stack.

The integrated heating is particularly useful in UK conditions because lower-temperature charging performance matters on home battery systems. Likewise, the combination of IP65 and IK10 ratings gives installers and homeowners a more durable product platform for real installation environments. Sync Energy also publishes Type 2 integrated AC and DC surge protection as part of the wider Flow system feature set, reinforcing the product’s suitability as a complete home energy platform.

Designed for homes with or without solar

Current Sync Energy documentation states that the Flow all-in-one system is suitable for new installations or retrofit projects, with or without solar (PV). That is an important buying point because it means the system is not limited only to homes already running a PV array. It can be installed as part of a solar project from day one, or it can begin as a storage-led home energy system designed to charge from the grid at lower-cost periods and use that stored electricity when rates are higher.

This flexibility is one of the reasons the Flow range stands out. It acknowledges that not every buyer is on the same journey. Some want solar and storage together straight away. Others want to begin with storage and add solar later. The Flow all-in-one 3.6kW platform supports both pathways.

Monitoring and everyday control

Sync Energy confirms remote monitoring and control via the Sync Energy app across the Flow platform. For the homeowner, this matters because stored energy becomes much more useful when it can be monitored and managed clearly. App-connected control helps the user understand when energy is being stored, when it is being used and how the system is contributing to lower grid reliance.

For installers, app-based monitoring also supports clearer handover and better end-user engagement. A home energy system is more valuable when the owner can actually see what it is doing.

Dimensions, weight and choosing the right option

The published dimensions and weights vary depending on the battery count. Sync Energy lists the 3.6kW all-in-one system at approximately 979 x 621 x 245mm and 99.6kg for the 1-battery version, 1288 x 621 x 245mm and 150.7kg for the 2-battery version, and 1597 x 621 x 245mm and 201.8kg for the 3-battery version. This matters in practice because the installer can match the physical system size as well as the electrical storage size to the available plant-space or utility-room layout.

Buyers who want a smaller starting footprint and lower initial storage cost will usually be better served by the 1-battery version. Homes with greater evening load, stronger off-peak tariff strategy or higher solar capture ambitions may be better suited to the 2- or 3-battery versions.

Why this parent product may be the right choice

If the page is intended to house the 3.6kW Flow all-in-one options rather than one fixed kit, this parent product format makes sense. It gives the customer one clear route into the 3.6kW system family while still allowing the correct storage option to be selected within the range. It also keeps the product message focused: this is a coordinated home energy platform with a 3.6kW hybrid inverter at its core and official battery choices of 1, 2 or 3 modules.

That combination of hybrid flexibility, modular storage, integrated safety features, app control and a published 10-Year Warranty makes it a strong fit for quality-focused domestic energy projects.

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