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During a typical bicycle ride (30 km in a hilly region), about 200 watt-hours are used by the battery of an electric bike. In order to fully re-charge two bicycles (this is usually the case for caravan owners), the on-board battery has to supply a charge of about 50 Ah for these two batteries.
If you take a typical on-board battery with a nominal capacity of 80 to 90 Ah, considering that the actually available capacity is generally 50 to 70 Ah, depending on the state of the charge, you will quickly realise that, after charging two bicycle batteries, the on-board battery will be nearly or fully exhausted.
This is made worse by the fact that charging the bicycle batteries takes place in the evening or in the night, with the consequence that there is little or no support from a solar generator. A fuel cell is a good solution to compensate for the performance deficit of the on-board battery.
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“The EFOY was the best accessory purchase for my motorhome”
You have to invite it if it did not already exist. It provides the motorhome with power and is extremly environmentally friendly and quiet. Although it is an engineering marvel, it is easy to use. Automatic mode on and forget!
Hans K.
The smallest fuel cell, EFOY 80, supplies a charge of as much as 80 Ah per day, making charging two bicycle batteries possible, even after longer rides in the mountains. You must ensure, however, that you manually start the fuel cell at the beginning of the charging process at the latest to counteract deep discharge of the on-board battery. Furthermore, the on-board battery should be charged as much as possible before the inverter is turned on. If necessary, start the fuel cell in time during the day so the on-board battery is fully charged on your return from the bike ride, so you can start charging the bike batteries straight away.
Of course, as a general rule, it is advantageous to have a larger fuel cell (and a larger on-board battery) to remain on the "safe side" after longer bike rides with high power consumption. If you are operating larger power consumers in the caravan such as a satellite TV or even a compressor fridge, I would definitely recommend the EFOY 150 or EFOY 80 in combination with an EFOY lithium battery.
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