Alles wat je moet weten over de accu van je elektrische fiets

Alles wat je moet weten over de accu van je elektrische fiets

Een elektrische fiets is zo goed als de accu die hem aandrijft. Toch is de accu vaak het onderdeel waar mensen het minst over nadenken — tot het moment dat je halverwege een rit stilvalt of merkt dat je fiets nog maar de helft haalt van wat hij ooit deed. Dan wil je precies weten hoe het zit.

Hoe lang gaat een fietsaccu mee?

De meeste lithium-ion accu's die in elektrische fietsen worden gebruikt, gaan zo'n 500 tot 1000 laadcycli mee. Wat dat in de praktijk betekent: als je je fiets drie keer per week oplaadt, haal je na twee à drie jaar een merkbare achteruitgang in capaciteit. Je rijdt dan misschien nog maar 60 à 70 procent van de oorspronkelijke afstand. Dat is geen defect, maar gewoon slijtage. Hoe zorgvuldiger je omgaat met opladen, hoe langer je dit uitstelt.

Slim opladen verlengt de levensduur

Een veelgemaakte fout is de accu altijd tot 100 procent opladen en hem daarna ook volledig leeg rijden. Dat klinkt logisch, maar bij lithium-ion accu's werkt het anders. De zogeheten 'sweet spot' ligt tussen de 20 en 80 procent. Laad je hem elke keer volledig op en laat je hem ook volledig leegrijden, dan versnel je de slijtage flink. Gebruik je de fiets een tijdje niet, zorg dan dat de accu op zo'n 50 tot 60 procent staat opgeslagen — niet volledig opgeladen en zeker niet helemaal leeg.

Wanneer is vervangen de beste optie?

Soms is een accu te ver heen om nog goed te presteren, en dan is repareren niet meer zinvol. Een nieuwe accu van een goed merk kost doorgaans tussen de 300 en 600 euro, afhankelijk van het voltage en de capaciteit. Voor een goede vervanging van de accu elektrische fiets is het slim om te kiezen voor een gespecialiseerde aanbieder die ook de technische ondersteuning kan bieden als er iets niet klopt. Goedkope alternatieven van onbekende merken lijken aantrekkelijk, maar leveren regelmatig problemen op met compatibiliteit of veiligheid.

Feestje plannen, accu checken

Een moment waarop je écht niet wil dat je accu je in de steek laat, is als je op weg bent naar een evenement of feestlocatie. Wie z'n fiets gebruikt als vervoer voor een avondje uit — of juist om spullen te vervoeren naar een buitenfeest — weet hoe vervelend een halfvolle accu op zo'n dag is. Laad de avond voor een speciale gelegenheid altijd op, zodat je met een ruime marge vertrekt.

De temperatuur die niemand vergeet te noemen maar iedereen negeert

Kou is de grootste vijand van een fietsaccu. Bij temperaturen onder nul kan een accu tijdelijk tot wel 30 procent minder capaciteit tonen. Dat is niet permanent, maar het verklaart waarom je in de winter ineens veel minder ver komt. Bewaar de accu in de winter zoveel mogelijk binnen — niet in een koude schuur of buitenberging. Een accu die 's nachts op kamertemperatuur staat en 's ochtends in de fiets gaat, presteert aanzienlijk beter dan een accu die de hele nacht buiten heeft gelegen.

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