Balcony photovoltaic kit with 2.2kWh storage and 800W Marstek inverter compliant with CEI0-21
800W balcony solar kit with 2.24 kWh Marstek B2500 LiFePO4 storage, Marstek M2-800 micro-inverter (CEI 0-21, IP67, WiFi), solar panels and universal balcony brackets. Plug & Play via Schuko 230V — no electrician, no structural work. Self-consumption above 90%. Savings €350–440/year. 10% VAT and 50% tax deduction available in Italy.
The 800W balcony solar kit with 2.2kWh Marstek storage is the most complete solution for maximising solar self-consumption in an apartment, without complex bureaucracy or structural work. The Marstek M2-800 micro-inverter is CEI 0-21 compliant and works together with the Marstek B2500 LiFePO4 battery (2.24 kWh) to store daytime solar energy and make it available in the evening — pushing self-consumption above 90%.
Technical specifications — KIT08KWCEIBAT-M
| Panel power | ~800 Wp (2 monocrystalline panels) |
| Micro-inverter | Marstek M2-800, 800W, 2 MPPTs, max efficiency 99.8%, CEI 0-21, IP67 |
| Battery | Marstek B2500, 2.24 kWh LiFePO4, IP65 |
| Connectivity | Integrated WiFi, Marstek App (iOS/Android) |
| Connection | Schuko plug 230V — Plug & Play |
| Inverter warranty | 10 years |
| Included | Universal balcony mounting brackets |
How much can I save?
An 800W system produces 950–1,200 kWh/year. With the Marstek B2500 battery, self-consumption rises above 90%, with an estimated annual saving of €350–440/year depending on location. Payback in 18–24 months.
VAT and tax incentives
In Italy this kit qualifies for reduced 10% VAT and a 50% IRPEF tax deduction in 10 annual instalments via the "Bonus Ristrutturazione" scheme.
Frequently asked questions
Does adding a battery to a balcony kit really make sense?
Yes, if your consumption is concentrated in the evening or at night. Without storage, surplus daytime energy is fed to the grid for free. With the Marstek B2500 (2.2 kWh), self-consumption rises above 90% and annual savings increase by €100–150 compared to a kit without storage.
Can I expand the storage capacity in the future?
Yes. The Marstek B2500 battery is modular: additional units can be daisy-chained to reach higher total capacities, without modifying the micro-inverter or existing system.
Do I need planning permission to install this kit on my balcony?
No. Italian Civil Code art. 1122-bis permits solar panel installation on private property (balcony, railing) without condominium assembly approval, provided it does not significantly alter the building's structure or appearance. It is good practice to inform the building manager.
📦 Shipping information for international customers
This solar kit is primarily sold and shipped within Italy. If you are interested in receiving it elsewhere in Europe, please contact us at info@mrwatt.eu stating the product you are interested in and your delivery address — we will get back to you with a shipping quote as soon as possible. ☀️
