This event happened on Thursday, October 8, 2026.
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Annapolis Powerboat Show
Going to this one?
Free members get show-prep discount codes at JS Ultimate Sounds and JS Alternators — plus alerts when new shows are added near you.
When
Thursday, October 8, 2026
2:00 PM
About
400+ powerboats in the water at historic City Dock — the powerboat half of Annapolis’ famous October doubleheader.
Gear for this build
In stock at our partner shops — real prices, shipped from people who run this stuff.
JS Alternators
JS Alternators High-Output Alternator
250A–400A+ hand-built in the USA. Find the fit for your year/make/model.
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Sundown Audio
Sundown SA150-975L Super-Cap Battery
What a capacitor pretends to do — real stored energy for voltage sag.
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Stealth Energy
American Bass Stealth ST-750 75Ah AGM
75Ah AGM — deep reserve for high-draw audio and dual-battery setups.
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Stealth Energy
Stealth Energy ABLT-40 13.8V LTO 40Ah
Lithium titanate — huge current, light weight, holds voltage under load.
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JS Ultimate Sounds and JS Alternators are run by the ShowUp team — buying there supports the site. Prices as listed at the shop.