Tasks of the solar system (peninsula system)
, From Sally Zhuang, 2 min reading time
- ensure complete self-sufficiency of the 2-family house
- E-car charging from April to October
- Drinking water heating (300 liters)
- Completely manual control without internet possible (in case of blackout)
Parts list (not complete) of the installed devices:
- 11 x charge controller EPever 10420 AN
- 11 x MT 50 display
- 4 x Powerqueen LiFePo4 12.8V 410Ah (21kwh)
- 4 x Powerqueen LiFePo4 12.8V 240 Ah (12kwh)
- 10x Sunpower 12V lead gel battery 270Ah (32.4kwh > 16kwh usable)
- 5x Einhell battery charger CE-BC 30
- 5x LiFePo4 chargers Powerqueen (40A)
- 1x Briggs & Station P4500 emergency generator (4.5/3.7 kW continuous power)
- 23x 415W Trina Vertex solar modules (13kWp)
- 3 module fields (1x south-facing, 1x southeast-facing, 1x south-west-facing) for maximum yield
- 3x Giandel 4kw/12V/220V inverter
Structure of the battery banks:
12V in parallel connection
Advantages: Individual monitoring of each battery is possible, required technology is very inexpensive
Function of the battery banks:
12V lead-gel battery bank supplies house, drinking water storage and is used when needed
(bad weather, high energy demand) additionally supplied by LiFePo4 battery banks
Why? > Lead-gel battery bank is designed for high peak current
LiFePo4 battery banks can be connected directly (manually) via sufficiently dimensioned cables
(Attention! only possible if lead-gel battery at 80% charge level (LiFePo4 rest voltage 13.3 > lead-gel 12.7V)
Home supply:
3 circuits in 3-phase operation via mains power, each with 3 emergency switches for solar operation (solar operation only via light current > Caution > Restrictions when using an electric stove, for example)
Danger: The system is not designed as a zero-feed or feed-in system! The supply network must always be switched from or above the zero position!
E-car charging:
A separate inverter + 21kWh battery is used for the electric car (surplus energy)
Drinking water storage:
The same system as for the electric car is used for the drinking water storage (optional summer solution) (surplus energy)
Winter operation and possible blackout:
The system can be fully charged in winter via the generator and the chargers with 3.5KW in 10-12 hours and ensures the supply of the house without restrictions for at least 24 hours
With 4x60l petrol canisters, self-sufficiency can be ensured for at least 2 months.
by Frank
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