Delphia 11 electric custom upgrade

The Delphia 11 electric “Life” version comes standard from the yard with a 50kW Torqeedo electric motor and a 40kW Torqeedo battery, good for about 4 hours of autonomy at 9 km/h with a consumption of 9kW.

Complementing this factory system, this 2023-model Delphia 11 Sedan has been customised. This upgrade includes: 6 Sunpower Maxeon 430W solar panels, (2) 3.5kW Torqeedo 24V lithium household batteries, a 24/5000 Victron inverter, a Whisperpower Piccolo 10 kVa generator and a Torqeedo DC/DC converter connecting the high-voltage drive battery to the 24V household batteries.

This comprehensive system provides significantly more autonomy:

The 2.6kW solar panel system fully charges the 7 kW lithium household batteries in a few hours. Via the large inverter, this can power all household consumers - air conditioning, heating, kettle, boiler and so on - without shore power. 

Solar energy can also slowly recharge the 40kW propulsion battery via the DC/DC converter when the vessel is moored in the open.

The generator provides virtually unlimited range after about 4 hours of fully electric cruising at 8-9 km/h. While sailing, it charges both the high-voltage propulsion battery and the 7kW household batteries, providing the 9kW needed for cruising speed of 9 km/h.

Consuming around 3 litres per hour, this series-hybrid solution is much more economical and quiet than a parallel-hybrid with both electric and diesel engines (such as the Greenline hybrid yachts), and ideal for low displacement speeds.

Operating instructions for optimum efficiency

Generator

When sailing and your destination is beyond the range of the main drive battery (about 4 hours at 9 km/h), it is recommended to switch on the generator when the battery reaches 20-30%, unless your destination is within an hour. This ensures that you can continue sailing without significant further loss of battery capacity.

Turn on the Whisperpower generator. Set the current on the Victron panel to 6-8A (so as not to overload the generator).

Increase in the B&G settings screen the charge capacity to 32A (to make full use of the capacity of the generator and the 2 charge controllers).

You now make full use of the 10kVA generator to charge both the main drive battery and the smaller lithium household batteries.

You can also use the 24V household batteries to recharge the large drive battery by lowering the ‘LV to HV’ slider in the advanced settings. This means that you now also draw from the household system to recharge the drive. This is especially advantageous on sunny days when the household batteries are already full and the excess solar energy would otherwise go unused. Check the status of the household batteries via ‘components’ on the B&G display; at 90-100% they are almost full.

Go to the ‘energy flow’ screen to see how much power is going into the main drive battery. While sailing, you can see on the throttle screen whether power is going into or out of the battery, giving an indication of the balance between consumption (for sailing) and regeneration (solar, generator and household batteries combined).

When returning to port: in the settings screen, reduce the load limit to the value of the shore power connection.

Additional customisation

Finally, an additional steering position was installed on the foredeck of the roof, ideal in fine weather. This kept the vessel's headroom down to 290 cm, while still offering the pleasure of a mini-flybridge. When used during the hot summer months in France, the owner made frequent use of this steering position. As this extra advantage is not ergonomic for every skipper, this mini-helm is included at no extra cost.

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