MARSTEK Saturn B2500-D Balcony Solar Battery Storage 2.24kWh LFP Expandable to 8.96kWh IP65
- Free delivery
- 14-day returns
- 2-year warranty
- Secure payment
Description
The MARSTEK Saturn B2500-D is a balcony solar battery with a 2.24 kWh LFP cell that connects to almost every mainstream solar module and microinverter via its MC4 interface, helping you cut your electricity costs.
- 2.24 kWh of storage capacity, expandable to 8.96 kWh → so the system can grow with your energy needs at any point, without you having to invest in an oversized setup from day one
- 2 independent MPPT channels with up to 1600 watts of PV input → uses solar energy particularly efficiently and feeds it into the household as needed, so the solar power you generate during the day is still available in the evening
- MC4 interface with broad compatibility across mainstream solar modules and microinverters → integrates easily into existing installations, with no need to replace the components you already have
- Installation in minutes, with no tools or technical expertise → so you can get started immediately, without waiting for an installer or paying high fitting costs
- LFP battery technology with over 6000 charge cycles and a 10-year manufacturer's warranty → works reliably for many years and retains most of its original capacity over the long term, so your investment lasts
- IP65 rating: dust-tight and protected against water jets → so you can use the battery outdoors on a balcony all year round without worrying about the weather
Ideal for renters and homeowners who want to retrofit reliable storage on a balcony or to an existing solar installation. Genuine product, as-new condition. With built-in seven-stage safety protection and MARSTEK app control you keep full visibility of your energy use at all times – the dependable choice for permanent use with no installation work.
Questions about this unit
Do I need to register this set?
Rules differ by country and network operator — check what applies where you are. In most markets a plug-in system is notified to the local grid operator, and the battery falls under the same notification as the solar it sits behind. The paperwork is included with the delivery.
Does the output rating breach the export limit?
No. Export limits apply to the power fed into your home wiring. In the manufacturer's app you set the export to whatever your market allows; the higher rated output is used for connected loads and for internal charging.
Can I add more batteries later?
On the modular units, yes. The extra pack stacks, connects with the supplied cable and is recognised in the app after a short firmware sync. No work on your home wiring is needed. The maximum configuration is listed in the technical data.
Can it stay outside in winter?
With IP65 and cell heating, yes: discharge down to −20 °C, charging from around 0 °C, with the heater covering the range below. Choose a rain-sheltered spot on a wall and leave clearance at the vents.
How long do the rated cycles last, and what does the warranty cover?
At roughly 250 to 300 full cycles a year, 6,000 cycles is more than 15 years of use down to 80 % remaining capacity. The manufacturer warranty is listed in the technical data; your statutory rights apply on top.
How is it installed, and do I need an electrician?
Panels plug in, the unit stands on a level surface or mounts with the supplied bracket, and it connects to a standard socket. The plug-in configuration does not require an electrician. For a fixed feed-in point or metering in the consumer unit, use a qualified electrician.