A battery storage system makes you more independent from the grid and saves money. But how does it actually work? This lesson explains the basics.
What Does a Home Battery Do?
- Store solar power: Generate during day, use in evening
- Store cheap grid power: Charge at night, use in evening
- Provide backup power: Stay powered during outages
Key Specifications
| Spec | Meaning | Typical Home |
|---|---|---|
| Capacity (kWh) | How much energy fits | 5-15 kWh |
| Power (kW) | Charge/discharge speed | 3-10 kW |
| Cycles | Full charge cycles | 6,000-10,000 |
| DoD (%) | Usable capacity | 90-95% |
What Size Do I Need?
Rule of thumb: 1 kWh per 1,000 kWh annual consumption
- Single/Couple (2,500 kWh/year): 5 kWh storage
- Family (4,000 kWh/year): 8-10 kWh storage
- With EV: +5 kWh additional
Deepen your knowledge in Stromfee Academy Lesson 2.
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