Marstek

Marstek Mars I Plus three-phase hybrid inverter 12kW 4 MPPT for residential storage

Name: Marstek Mars I Plus three-phase hybrid inverter 12kW 4 MPPT for residential storage
Brand: Marstek
SKU: Mars-I-plus-ESS-inverter
Price: 1388.24 EUR
Availability: InStock

€1,388.24

Sale Sold out Excl. VAT — calculated in the cart

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Price including VAT by delivery country

Italy22% €1,693.65
Germany19% €1,652.00
France20% €1,665.88
Austria20% €1,665.88
Belgium21% €1,679.77
Bulgaria20% €1,665.88
Croatia25% €1,735.30
Cyprus19% €1,652.00
Czech Republic21% €1,679.77
Denmark25% €1,735.30
Estonia24% €1,721.41
Finland25.5% €1,742.24
Greece24% €1,721.41
Hungary27% €1,763.06
Ireland23% €1,707.53
Latvia21% €1,679.77
Lithuania21% €1,679.77
Luxembourg17% €1,624.24
Malta18% €1,638.12
Netherlands21% €1,679.77
Poland23% €1,707.53
Portugal23% €1,707.53
Romania21% €1,679.77
Slovakia23% €1,707.53
Slovenia22% €1,693.65
Spain21% €1,679.77
Sweden25% €1,735.30

Shown prices exclude VAT. At checkout the rate of the delivery country applies. Businesses with a valid EU VAT number buy without VAT (reverse charge).

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Pallet shipping by country

up to 500 kgup to 750 kg

Italy230 € 320 €
Austria230 € 320 €
Belgium230 € 320 €
Czech Republic230 € 320 €
Denmark230 € 320 €
France230 € 320 €
Germany230 € 320 €
Luxembourg230 € 320 €
Netherlands230 € 320 €
Poland230 € 320 €
Spain230 € 320 €
Bulgaria320 € 410 €
Croatia320 € 410 €
Estonia320 € 410 €
Finland320 € 410 €
Greece320 € 410 €
Hungary320 € 410 €
Ireland320 € 410 €
Lithuania320 € 410 €
Portugal320 € 410 €
Romania320 € 410 €
Slovakia320 € 410 €
Slovenia320 € 410 €
Sweden320 € 410 €
Latvia320 € 329.24 €
Maltaon request
Cypruson request

The price does not include shipping. Goods travel on a pallet with a dedicated carrier: half pallet up to 500 kg, full pallet up to 750 kg. Above 750 kg the cart adds the further pallets on its own. The exact amount is shown in the cart.

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Prices exclude VAT: tax is calculated in the cart based on the delivery country.
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Delivery in 10-20 daysHybrid inverterMarstek

Marstek Mars I Plus three-phase hybrid inverter 12kW 4 MPPT for residential storage

The Marstek Mars I Plus three-phase is a 12kW hybrid inverter that packs seven functions into one device: hybrid conversion, four MPPT trackers, V-Boost high-voltage battery management, emergency power supply, local EMS, SG-Ready heat pump control and EV charging readiness. It accepts up to 24kW of solar and is also available in 8kW and 10kW sizes.

It is the core of a residential or small-business storage system with substantial three-phase loads. V-Boost at 800V nominal (650–950V) with real-time cell balancing removes the barrel effect between battery modules, while EPS kicks in within 10 ms. The 10.1-inch HD touchscreen gives access to live data, open APIs allow integration with third-party EMS platforms, and up to four systems can run in parallel for 48kW.

Note for Italy: Marstek's CEI 0-21 certification only covers the single-phase versions of the Mars I Plus, not this three-phase version. Before buying, check with your grid operator that the connection is possible.

Key features

12kW three-phase, 7 functions in oneHybrid inverter, 4 MPPTs, battery management, EPS, local EMS, SG-Ready heat pump and EV charging in a single device.

24kW of solar across 4 MPPTsFour independent trackers starting at 200V make the most of roof sections with different orientations and shading.

V-Boost 800V nominalHigh voltage with real-time cell balancing unlocks the real capacity of every battery module.

EPS in under 10 msThe switch to emergency power is instant and the home keeps running through every outage.

Technical specifications

Feature	Value
Product code	MST-MARS I PLUS-12KTP
Device type	Three-phase hybrid inverter for storage systems
Rated AC power	12kW (also available in 8kW and 10kW)
Number of phases	Three-phase
PV input power	up to 24kW
Number of MPPTs	4, starting at 200V
Battery voltage (V-Boost)	800V nominal, 650–950V range, with real-time cell balancing
Managed storage capacity	5.12kWh to 30.72kWh (up to 6 modules)
EPS response time	< 10 ms
EV charging (optional)	up to 25kW DC / 11kW AC
V2X function	up to 12kW
Heat pump control	SG-Ready
Energy management	Local EMS with 10.1" HD touchscreen
Parallel operation	up to 4 systems: 48kW and 122.88kWh
Generator	diesel generator ready in off-grid mode
Communication	Bluetooth, Wi-Fi, Ethernet, RS485, CAN, open API for third-party EMS
CEI 0-21 certification	No for the three-phase version (single-phase versions only)
Ingress protection	IP65
Noise level	< 30 dB
Operating temperature	-25 °C to +60 °C
Warranty	10 years

Documentation

PDFMarstek Mars I Plus - Product Introduction (PDF)Official manufacturer document PDFMarstek Mars I Plus Three-Phase - Brochure (PDF)Official manufacturer document

Installation and wiring must be carried out by qualified personnel in accordance with the applicable standards and the electrical design of the system.