MARSTEK VENUS E Mini
The VENUS E Mini is documented in the distributor materials, but it is not on the current Philippine SRP flyer, and the only manual on file is a 230 V / 50 Hz edition. Check availability, pricing and a Philippine (220 V / 60 Hz) variant with Silvera Solar Power before offering it to a customer. No official product photo is in the source set, so this page has none.
What it is: the VENUS E Mini (model MST-BIE2-1500, "2 kVAh") is a smaller AC-coupled energy storage system from the VENUS family. It has a 2,009.6 Wh LiFePO4 battery, a Grid port and a BACKUP socket, and works with an existing solar system through a CT/meter, like the VENUS E 3.0.
Who it's for: smaller homes, condos or light-load users who want plug-in storage and modest backup (1.5 kVA) instead of the 5.12 kWh / 2.5 kVA VENUS E 3.0.
Best for
- Small households with an existing solar system that want to store surplus solar (Self-Consumption with a CT/meter).
- Backing up a few essential loads (lights, router, fan) during brownouts, within 1.5 kVA.
- Customers who want the VENUS app experience at a smaller capacity.
Key features
From the VENUS E Mini manual:
- Operating modes: AI Optimization, Self-Consumption and Manual (§1.6), configured in the MARSTEK app. The introduction (§1.1) also mentions a UPS mode, but §1.6 describes only three modes.
- Compensation function: single-phase compensation, or three-phase total compensation for near-zero export. Three-phase compensation is "strongly advised" for multi-device installations.
- Meter compatibility: fully compatible with MARSTEK CT002 and CT003. Also works with Shelly Pro 3EM, Shelly EM Gen3, Shelly Pro EM-50, ECOTRACKER IR and PI Meter (only one device per phase for these third-party meters).
- Whole-house backup: can work with the MARSTEK SmartBox (the manual's diagram shows "Single-Phase/Three-Phase SmartBox") with multiple VENUS E Mini units. See More products.
- LED indicators: error, Grid socket on, BACKUP socket on, capacity bar, CT connected, Wi-Fi connected, BT connected.
- Interface: On/Off button, BACKUP AC socket (EU standard), Grid port.
Specifications
Source: VENUS E Mini user manual, Technical Specifications (English section).
| Specification | Value |
|---|---|
| Model | MARSTEK Venus E Mini (MST-BIE2-1500) |
| Battery | |
| Rated voltage | 6.4 V |
| Capacity | 2,009.6 Wh (314 Ah × 2S) |
| Cycle life | >6,000 (25 °C) |
| Cell type | LiFePO4 |
| Depth of discharge (DoD) | 90% |
| AC input | |
| Rated input power | 1.5 kVA |
| Working phase | L/N/PE |
| Rated grid voltage / frequency | 230 V / 50 Hz |
| Rated grid input current | 6.52 A |
| Power factor | >0.99 (default), 0.8 lagging … 0.8 leading (adjustable) |
| THDi | <3% |
| AC output (on-grid) | |
| Rated output power | 800 VA / 1.5 kVA |
| Working phase | L/N/PE |
| Rated grid voltage / frequency | 230 V / 50 Hz |
| Rated grid output current | 3.48 A / 6.52 A |
| Power factor | >0.99 (default), 0.8 lagging … 0.8 leading (adjustable) |
| THDi | <3% |
| Backup (off-grid) | |
| Rated output power | 1.5 kVA |
| Peak output power | 1.8 kVA (60 s) |
| Rated output current | 6.52 A |
| Rated voltage / frequency | 230 V / 50 Hz |
| THDu (linear load) | <3% |
| Efficiency | |
| Battery side to AC side, maximum | >88% |
| Protection | |
| Protection class | I |
| Overvoltage withstand level | DC II / AC III |
| General | |
| Ambient temperature range | -20 °C to +60 °C (storage -30 °C to +85 °C) |
| Dimensions | 386 × 450 × 105 mm |
| Relative humidity | ≤95% |
| IP rating | IP65 |
| Cooling | Natural cooling |
| Max. operating altitude | 2,000 m |
| Grid-connected port | MST-grid port |
| Off-grid port | European socket |
| Display | LED |
| Communication | Bluetooth, Wi-Fi |
| Weight | Not stated in the manual |
The manual's dimension drawing (§1.3) gives 386 × 105 × 450 mm, while the spec table gives 386 × 450 × 105 mm. The numbers are the same; only the axis order differs. No datasheet for the Mini is in the source set, so these values have not been cross-checked against one.
Price (SRP)
The VENUS E Mini is not listed on the current SRP flyer in Drive. Do not quote a price; ask Silvera Solar Power. See the price list for products that are listed.
Installation & safety
From the VENUS E Mini manual (§2, §4 and Safety Information):
Do not connect both the Grid and BACKUP sockets to the city power network. The manual warns this causes a circuit break or device damage. Improper wiring risks short circuits, backflow failures and fire.
- Who installs: only qualified professionals or properly trained personnel. Do not power on until it is correctly installed or confirmed by a professional. Obtain utility approval before grid-tied operation.
- Orientation: upright only. Never tilt it, lay it flat or turn it upside down.
- Surfaces: solid brick-concrete, concrete walls or floors are recommended. Alternatives (drywall, wood) must be flame-retardant and meet the load-bearing requirement.
- Clearance: keep clearance for heat dissipation and safety isolation. No other equipment nearby (except VENUS-compatible devices and approved awnings) and no flammable or explosive materials.
- Accessories: AC cable ×1 and wall-side mounting bracket ×1 (wall mounting steps are optional).
- Recommended tools: screwdrivers, wrench, diagonal pliers, insulating gloves, measuring tape.
- Breakers: each branch line must have a circuit breaker; a central protective device is not required.
- Maintenance: authorised personnel only; inspect at least once a year. The AC output harness must not be replaced; if damaged, the device must be scrapped. Unplug from the grid before maintenance.
- Install in a dry, well-ventilated area away from liquids and flammable or explosive gases.
Related tutorials
- VENUS E Mini quick start
- VENUS E app & working modes
- VENUS E Mini troubleshooting
- Accessory: CT002 Smart Meter
Sources
- VENUS E Mini user manual (Drive): all specifications, modes and installation rules
- MARSTEK Flyers – SRP (Drive): confirms the Mini is not on the current SRP flyer