Photo from the manufacturer
JouleSpecs does not sell and does not show shop prices: check the price where you buy.
MARSTEK Jupiter C Plus holds the battery, its electronics and a microinverter that feeds into the home within the threshold for plug-in systems, in a single body. You start with the base battery and grow by attaching up to three dedicated batteries under the control unit, stacked one on top of the other. A touchscreen shows how much is coming in from the sun and how much is going out to the home.
Panels go into four independent inputs, so two different orientations don't hold each other back. With a compatible smart meter it adjusts its output to the home's consumption. A serial port speaks Modbus: anyone with a home energy management system can control it from there, with no need to go through the app.
official manufacturer list price — on nominal capacity
| Parameter | Value | Source |
|---|---|---|
| Dimensions | 48 × 32 × 23 cm (18.9 × 12.6 × 9.1 in) | manufacturer website |
| Weight | 28.45 kg (62.7 lb) | manufacturer website |
| Nominal capacity | 2.56 kWh | Declared by the brand |
| Depth of discharge | 90 % | Declared by the brand |
| Cell chemistry | LFP (lithium iron phosphate) | Declared by the brand |
| Expandable | Yes | Declared by the brand |
| Maximum expanded capacity | 10.24 kWh | Declared by the brand |
| Feed-in limit | 800 VA | Declared by the brand |
| Inverter included | Yes | Declared by the brand |
| Maximum solar input | 2400 W | Declared by the brand |
| MPPT trackers | 4 | Declared by the brand |
| Rated cycles | 6000 cicli | Declared by the brand |
| Warranty | 10 anni | Declared by the brand |
| Ingress protection | IP65 | Declared by the brand |
| Minimum temperature | -20 °C | Declared by the brand |
| Maximum temperature | 60 °C | Declared by the brand |
| Local control | Modbus | Declared by the brand |
| Open protocols | Modbus RTU | Declared by the brand |
| Declared standards | VDE-AR-N 4105, EN 50549, CEI 0-21, IEC 62619 | Declared by the brand |
| Official list price | 599 € | Declared by the brand |
| Usable capacity | — | Not declared |
| Cell supplier | — | Not declared |
| Battery voltage | — | Not declared |
| Grid charging | — | Not declared |
| Maximum charge power | — | Not declared |
| Dynamic tariffs | — | Not declared |
| Backup power | — | Not declared |
| Backup output | — | Not declared |
| Switchover time | — | Not declared |
| Capacity at end of cycle life | — | Not declared |
| Guaranteed throughput | — | Not declared |
| Guaranteed remaining capacity | — | Not declared |
| Round-trip efficiency | — | Not declared |
| Standby consumption | — | Not declared |
| Mounting | — | Not declared |
| Cell heating | — | Not declared |
| Noise level | — | Not declared |
| Works without internet | — | Not declared |
| Home Assistant integration | — | Not declared |
| Where the data is hosted | — | Not declared |
| Remote updates | — | Not declared |
| App required for setup | — | Not declared |
| Battery passport | — | Not declared |
| Carbon footprint | — | Not declared |
| Recycled content | — | Not declared |
The rest of the data comes from one page on the manufacturer's site, cited row by row in the table above.
A manual or a datasheet counts as a source even when the original file is hosted elsewhere: what matters is the document, not the server. Where that happens, it is stated above.
These numbers are calculated, not stated: they have no source to cite, they have a formula you can redo. The price used is the manufacturer's list price, which is stable and the same in every country — not a shop's price on the day.
