If bike is indoors or shielded from elements, you might want to get an inexpensive non-waterproof cover made from breathable material. Less chances of having condensation collect under the cover. Also stuff something into the exhaust pipe, just in case rodents decide to make a nest in it. Could use a dirt bike exhaust plug, just get a large enough diameter.
My bikes are stored in a garage under large cotton (or breathable) dust covers all year round when not in use. Their Optimate 3 and Optimate 4 battery chargers are always on. The chargers are on a nearby shelf and connected to the bikes by Optimate's long extension cables.
You should be fine, but good ventilation always helps to keep the motorcycle free of condensation which can be a winter problem when the air temperature goes from cold to "warm" in a day .
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