Originally Posted by PETDOC
The initial Shorai recommended for the 1150 GS was the 18 Ah, which I purchased. It was inadequate in temps below 35 degrees F. Shorai has since changed their recommendation for the 1150 to the 21 Ah battery. They replaced my original Shorai with a 21 Ah battery, but I've had a couple of bad breaks since installing it (ankle then 4 months later clavicle+5 ribs) and can't yet comment on cold weather starting.
I've now had the opportunity to use my 21 Ah Shorai. My experience can be summed up with the comment 'my Odyssey PC680 will arrive in 2 days'. Anyone interested in a very slightly used Shorai battery (~200 miles) and Shorai charger I'll take
$150 dollars for the pair.