Free shipping
We deliver directly to your home free of charge.*
Delivery usually takes 7-14 working days*, so just sit back and relax.
*More information can be found in the shipping conditions .
14-day money-back guarantee
We guarantee a 14-day return policy. This means that, regardless of the reason, you can cancel your order within 14 days. As soon as we receive your return in its undamaged original packaging, we will process your refund immediately.
Please note that any costs incurred during a return or refund – such as PayPal's 2% transaction fee and return shipping costs – will be retained as a fee. This fee covers payment and processing costs.
*For more information on the conditions for a successful refund process, please see our refund policy .
10-year warranty
Marstek.de offers a 10-year warranty. Should the product fail within this period due to material or manufacturing defects, we will provide a replacement. The replacement product will be covered for the remaining warranty period of the original item.
To make a warranty claim, please contact our customer service at: support@marstekenergy.com .
*Further details can be found in our warranty conditions.
Online customer service
We're happy to help! If you have any questions or suggestions, please write to us at support@marstek.de – our team will take care of your request immediately.
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With up to 800 W output power, the Jupiter C Plus is ideal for most household energy requirements – you will become more independent from the grid and effectively reduce your energy costs.
With up to 800 W output power, the Jupiter C Plus is ideal for most household energy requirements – you will become more independent from the grid and effectively reduce your energy costs.
During the day, the Jupiter C+ converts the solar energy collected by the solar panels into alternating current and feeds it into the home's electrical grid to meet daily needs, while storing excess energy. This reduces electricity consumption from the grid and lowers energy costs.
At night, the Jupiter C+ releases the stored energy to power household appliances. With an expandable capacity of up to 10.24 kWh, it easily covers the entire daytime energy needs of a house.
Marstek App
Plug & Play
Simple and quick installation with a stackable design that allows for effortless capacity expansion. You do not need complex wiring or technical expertise. Save time, reduce labor costs, and make your energy supply simpler!
HD touchscreen
Marstek App
Plug & Play
Simple and quick installation with a stackable design that allows for effortless capacity expansion. You do not need complex wiring or technical expertise. Save time, reduce labor costs, and make your energy supply simpler!
HD touchscreen
Our LiFePO₄ (lithium iron phosphate) cell is a reliable energy source for your home. With over 6,000 charge cycles, it promises to brighten your moments for a decade or more. And like a guardian angel, its 7-stage safety protection watches over you, ensuring every charge is a safe embrace. Immerse yourself in a world where technology and humanity meet and experience energy that truly cares.
Quality you can rely on, guaranteed for a decade. The Jupiter C Plus sets a new standard in energy storage with its exceptional durability and performance, backed by our 10-year warranty. Enjoy years of reliable, worry-free energy, knowing your investment is protected.
The Jupiter C+ is dust and waterproof according to IP65 and operates reliably at temperatures from -20°C to +60°C. It offers reliable, year-round protection for photovoltaic systems in all weather conditions.
| Base battery | |
|---|---|
| Model | Jupiter C+ |
| Number of expansion batteries | 3 pieces (max) |
| Total capacity of the system | 2.56 kWh ~ 10.24 kWh |
| DC: PV Input | |
| Maximum input power | 2400W |
| Operating voltage range | 16V~60V |
| Short-circuit current | 20A |
| Number of MPPTs | 4 |
| MPPT Efficiency | 99,8% |
| AC: On-Grid Output | |
| Nominal output power | 800VA |
| Operating phase | L/N/PE |
| Nominal grid voltage | 230V |
| Nominal frequency of the grid | 50Hz |
| Nominal output current at the grid | 3.48A |
| Power Factor | > 0.99 (Standard) |
| THDi | < 3% |
| Efficiency | |
| Battery side - AC side Maximum efficiency | >96.5% |
| General | |
| Temperature range | -20 ~ + 60℃ (Storage -30℃ ~ + 85℃) |
| Relative humidity | 0–95% |
| IP level | IP65 |
| Cooling | Natural cooling |
| Maximum altitude | 2000m |
| Other | |
| Grid-connected AC connection | BC01 |
| Photovoltaic connection | MC4 |
| Display | HD Touchscreen |
| Communication | Bluetooth, WIFI and RS485 (waterproof aircraft connector) |
| Expansion battery (Stack) | |
| Model | JC+ B2500 |
| Parameters from the battery | |
| Capacity | 2.56kWh |
| Life cycles | >6000 (at 25°C) |
| Battery type | LiFePO4 |
| General (Battery) | |
| Temperature range | -20 ~ + 60℃ (Storage -30℃ ~ + 85℃) |
| Relative humidity | 0–95% |
| IP level | IP65 |
| Cooling | Natural cooling |
| Maximum altitude | 2000m |
Listen to what they say
At low temperatures, the activity of the lithium battery decreases, which can easily lead to the battery's power consumption being high and rapid. Therefore, care should be taken when using batteries in winter:
(1) In winter, it is recommended to reserve at least 30% or 50% of the battery power to avoid low battery performance. Especially in snowy weather, it is recommended to maintain 70% of the battery capacity to ensure that the battery has enough reserves.
(2) If the battery has not been charged for more than a week, it is recommended to interrupt the discharge until the battery is charged to more than 90% before turning on the discharge.
(3) Avoid high-power discharges. PV is weaker in winter and charging is more difficult. If the device is discharged at high power, this can easily lead to the battery having low performance for an extended period.
(4) Regularly check if the PV panels can deliver power normally. Especially after heavy snowfall, the PV panels can easily be blocked by snow and may not charge the battery for a long time.
Disclaimer
The maximum annual electricity cost savings of approximately €1,018 for the Marstek Jupiter C Plus is an estimate based on the following product parameters, scenario assumptions, and calculated values:
1. Basics for the calculation
- Product parameters: 2.4 kW maximum photovoltaic input power, 12.24 kWh maximum storage capacity, bidirectional inverter (continuous power 800 W).
- Scenario assumptions (Sources: German Energy Agency DENA, Federal Network Agency BNetzA 2025): 1,200 hours of sunshine/year (average value for Central Germany), €0.40/kWh average household electricity price (incl. taxes and fees), efficiency values: inverter 95%, storage (LFP technology) 93%.
2. Calculation formulas and calculations:
The savings are calculated by multiplying the amount of self-generated, usable solar power by the electricity price. The steps are as follows:
- Annual theoretical photovoltaic generation = photovoltaic power × hours of sunshine: 2.4 kW × 1,200 h = 2,880 kWh/year
- Usable solar power (after efficiency losses) = Theoretical generation × Inverter efficiency × Storage efficiency: 2,880 kWh × 0.95 × 0.93 = 2,544.48 kWh/year
- Annual savings = Usable solar power × Electricity price: 2,544.48 kWh × €0.40/kWh ≈ €1,018.
3. Note on realism:
Actual savings may differ from the estimated values, influenced by factors such as regional variations in annual sunshine hours (e.g., 1,300 hours in Bavaria versus 1,000 hours in Schleswig-Holstein), short-term fluctuations in electricity prices, individual household consumption habits (e.g., additional charging of electric vehicles), and the actual operating efficiency of the appliances (depending on ambient temperature and maintenance conditions). This estimate does not constitute a legal guarantee or warranty regarding actual savings.
Legal notice (Germany)
To benefit from the simplified exemption rules for plug-and-play solar power systems according to Section 8 Paragraph 5a EEG 2023:
- The installed PV capacity must be < 2000 Wp.
- The apparent power of the inverter must be ≤ 800 VA P.
If your total PV output exceeds 2,000 Wp, additional requirements may be imposed by the grid operator, e.g.:
a) Registration
b) Obligation to modify the meter
c) Formal approval procedures: Please inform yourself about the applicable local regulations before installation.
Plug & Play solar systems can generally be installed independently. However, in Germany, registration in the MaStR portal (www.marktstammdatenregister.de) is mandatory.
Commissioning and grid connection must be carried out by certified professionals. An electrician is legally required to ensure compliance with all regulations.
Ensuring compliance with regulations.
Disclaimer
The maximum annual electricity cost savings of approximately €1,018 for the Marstek Jupiter C Plus is an estimate based on the following product parameters, scenario assumptions, and calculated values:
1. Basics for the calculation
- Product parameters: 2.4 kW maximum photovoltaic input power, 12.24 kWh maximum storage capacity, bidirectional inverter (continuous power 800 W).
- Scenario assumptions (Sources: German Energy Agency DENA, Federal Network Agency BNetzA 2025): 1,200 hours of sunshine/year (average value for Central Germany), €0.40/kWh average household electricity price (incl. taxes and fees), efficiency values: inverter 95%, storage (LFP technology) 93%.
2. Calculation formulas and calculations:
The savings are calculated by multiplying the amount of self-generated, usable solar power by the electricity price. The steps are as follows:
- Annual theoretical photovoltaic generation = photovoltaic power × hours of sunshine: 2.4 kW × 1,200 h = 2,880 kWh/year
- Usable solar power (after efficiency losses) = Theoretical generation × Inverter efficiency × Storage efficiency: 2,880 kWh × 0.95 × 0.93 = 2,544.48 kWh/year
- Annual savings = Usable solar power × Electricity price: 2,544.48 kWh × €0.40/kWh ≈ €1,018.
3. Note on realism:
Actual savings may differ from the estimated values, influenced by factors such as regional variations in annual sunshine hours (e.g., 1,300 hours in Bavaria versus 1,000 hours in Schleswig-Holstein), short-term fluctuations in electricity prices, individual household consumption habits (e.g., additional charging of electric vehicles), and the actual operating efficiency of the appliances (depending on ambient temperature and maintenance conditions). This estimate does not constitute a legal guarantee or warranty regarding actual savings.
Legal notice (Germany)
To benefit from the simplified exemption rules for plug-and-play solar power systems according to Section 8 Paragraph 5a EEG 2023:
- The installed PV capacity must be < 2000 Wp.
- The apparent power of the inverter must be ≤ 800 VA P.
If your total PV output exceeds 2,000 Wp, additional requirements may be imposed by the grid operator, e.g.:
a) Registration
b) Obligation to modify the meter
c) Formal approval procedures: Please inform yourself about the applicable local regulations before installation.
Plug & Play solar systems can generally be installed independently. However, in Germany, registration in the MaStR portal (www.marktstammdatenregister.de) is mandatory.
Commissioning and grid connection must be carried out by certified professionals. An electrician is legally required to ensure compliance with all regulations.
Ensuring compliance with regulations.
