Originally Posted by
2old
13C (55F) shouldn't be a problem; 28C (82F) could be a concern if you're taxing the battery (into the wind, uphill etc); sounds like you reside in CA; I rode my 36V, 350w system at temps up to 95F last year and the battery didn't seem to get hot, but 175# rider, flat terrain, no wind (socal).
2old , that's good to know . Where I am (gold coast aust) is flat and coastal , it rarely gets windy , good days outnumber them . My concern was when the bike isn't getting used it sits in the garage on a 28C (82F) day (covered and in the shade) wether that heat would bugger it . Its a 48v 12ah 200w .