At Intersolar Europe 2026, which is currently taking place, Oukitel is showcasing the Oukitel EP2500, a modular all-in-one storage system for balcony power plants that combines an inverter, battery, BMS, and four MPPT trackers in a single enclosure. The base unit starts at 2.048 kWh and can be expanded up to 16.38 kWh; the PV input can handle up to 4,000 watts. For those looking to expand an existing balcony power plant with a storage system via AC coupling, this system feeds the legally permitted 800 watts into the grid and provides up to 2,500 watts of emergency power in off-grid mode.
TL;DR – Oukitel EP2500 at a Glance
- All-in-one design: integrated micro-inverter, LiFePO4 battery, BMS, and 4 MPPT channels in a single unit
- Capacity ranging from 2.048 kWh to 16.38 kWh (7 expansion batteries at 2.048 Wh each)
- Up to 4,000 W PV input via four independent MPPT trackers
- Output: 800–2,500 W grid-tied, up to 2,500 W in off-grid mode
- IP65, 6,000+ charge cycles, 10-year warranty
- Premiere: Intersolar Europe 2026, Munich, Hall C1, Booth 634 (June 23–25)
Oukitel EP2500: What’s Inside the All-in-One Balcony Power Plant Storage Unit
The core concept behind the EP2500 is convenience. Instead of combining an inverter, storage system, and energy management system separately, Oukitel packs everything into a single unit: an integrated micro-inverter, the LiFePO4 battery, the battery management system, and four MPPT solar charge controllers. This is designed to simplify installation and reduce the typical cable clutter for home users—think plug-and-play.
The AC coupling is particularly interesting: According to the manufacturer, the EP2500 is 100 percent compatible with standard microinverters and can be connected to an existing balcony power plant. So anyone already operating modules with a Hoymiles, Deye, or APsystems inverter can retrofit the storage system later.
Scalable capacity: from 2 to 16 kWh
The base station provides 2.048 kWh—enough to cover the typical evening and nighttime energy needs of a small household. Those who want more can stack up to seven expansion batteries, each with a capacity of 2.048 Wh, for a maximum total of 16.38 kWh. This takes the EP2500 beyond the realm of a typical balcony power plant and makes it an attractive option for households that want to store significantly more of their self-generated electricity.
The 16-kWh mark is no coincidence: this is precisely the range where the Anker SOLIX Solarbank 3 Pro—which we’ve already tested extensively and which also relies on four MPPT trackers—operates. The modular approach allows you to start small and upgrade later, rather than having to buy the maximum capacity right away.
4,000 watts of solar power via four MPPT trackers
The EP2500’s input is generously sized. Four independent MPPT channels each accept up to 1,000 watts, for a total of up to 4,000 watts of PV power. Having four separate trackers offers the advantage that partially shaded or differently oriented module strings do not hinder each other’s performance—each string is individually regulated to its optimal operating point. According to the datasheet, the input efficiency is up to 98 percent.
Grid-tied or off-grid operation: 800 to 2,500 watts
In grid-tied (on-grid) operation, the EP2500 delivers between 800 and 2,500 watts. The 800-watt level is the relevant value for German balcony power plants, which can be registered without the need for a licensed electrician. In off-grid mode, the system delivers up to 2,500 watts, making it suitable as an emergency power source during a power outage. Oukitel specifies the switchover time as ≤ 10 milliseconds—fast enough that sensitive loads will barely notice the change. A practical note: With AC storage systems in this power class, you must keep the German 800-watt feed-in limit in mind.
Smart Meter, App, and MQTT for Zero Net Metering
The EP2500 is controlled via the Oukitel app using Bluetooth and 2.4-GHz Wi-Fi. Generation, storage, and consumption can be monitored in real time, and the system includes time-of-use optimization for dynamic electricity rates. Using the included smart meter, the system aims for zero net metering—meaning it feeds only as much power into the grid as the household currently needs, so that no solar power flows into the grid without being compensated.
Of interest to tech enthusiasts: The EP2500 supports local MQTT. This allows the storage system to be integrated into your own energy management system and controlled offline without being completely reliant on the cloud—a feature rarely found in this price range.
Oukitel EP2500 Technical Specifications at a Glance
| Specifications | Oukitel EP2500 |
|---|---|
| Battery Type | LiFePO4, 51.2 V, 2,048 Wh (base) |
| Capacity | 2.048 kWh – 16.38 kWh (up to 7 expansion batteries) |
| Life cycles | 6,000+ cycles |
| Max. Output Power | Off-grid operation: 2,500 W / Grid-tied operation: 800–2,500 W |
| Rated output voltage | 230 V |
| Max. output current | 10.5 A |
| Inverter efficiency | 95% |
| Switching time | ≤ 10 ms |
| Max. PV input power | 4 × 1,000 W (max. 4,000 W) |
| MPPT trackers | 4 independent channels |
| Input efficiency | Max. 98% |
| Control | App via Bluetooth + 2.4 GHz Wi-Fi, MQTT |
| Dimensions of base unit | 492 × 475 × 287 mm |
| Net weight | 27.2 kg (base unit) |
| Protection rating | IP65 |
| Charging temperature | 0 °C to 55 °C |
| Certification | EN50549, VDE4105, CE, RED, REACH, RoHS, UN38.3 |
| Warranty | 10 years |
Durability and Warranty: IP65 and 10 years
For continuous outdoor operation, the EP2500 is IP65-rated for protection against dust and water jets—according to the manufacturer, no additional protective housing is required. The LiFePO4 cells are rated for over 6,000 charge cycles, and Oukitel offers a ten-year warranty. This is a standard that is considered good in today’s market for balcony power plant storage systems, but it is by no means a given.
Cost-Effectiveness: What Are the Benefits of the Storage System?
Oukitel estimates potential savings of up to 1,938 euros per year and cites a payback period of about two years. As with all manufacturer specifications, this figure is an ideal value that depends on electricity rates, panel orientation, and self-consumption patterns. The logic behind it is more realistic: A storage system raises the self-consumption rate of a balcony power plant from a typical 30–40 percent to 60–80 percent, because the midday surplus is stored for use in the evening. The extent of this effect in individual cases depends heavily on evening consumption—those who are away from home during the day and need a lot of electricity in the evening benefit the most.
Availability: Debut at Intersolar Europe 2026
The Oukitel EP2500 will make its debut at Intersolar Europe 2026 in Munich. From June 23 to 25, visitors can take a closer look at the system at Booth 634 in Hall C1. Oukitel has not yet announced an official market price ahead of the trade show; further information is available in Oukitel’s official EU store. We’ll provide the details as soon as the price and delivery date are confirmed.
Conclusion on the Oukitel EP2500
With its all-in-one approach, the Oukitel EP2500 perfectly captures the essence of the current balcony power plant storage market: high capacity (up to 16.38 kWh), high solar input (4,000 W via four MPPT trackers), and a clear focus on easy AC retrofitting. The combination of IP65 rating, 6,000 charge cycles, a ten-year warranty, and open MQTT support makes the system appealing to both beginners and ambitious DIYers.
