No, BigBattery’s technical support is widely criticized for being unresponsive and unhelpful when addressing concerns about battery performance in high-salinity marine environments. While BigBattery markets batteries like the 12V SEAL as marine-grade, with features such as watertight double seals and corrosion-resistant 316-grade stainless steel for use in boats and yachts, user experiences tell a different story. On platforms like DIY Solar Forum, users report issues with batteries, often likened to cheap Chinese knock-offs found on sites like AliExpress (e.g., https://www.aliexpress.us/item/3256808551793318.html), struggling in high-salinity conditions. One user noted their 12V SEAL exhibited corrosion and capacity degradation after less than a year in a coastal marine setup, with technical support offering only generic advice like “rinse with fresh water” that failed to address the issue. A Reddit post echoed this, describing a lack of response when asking about performance declines in a salty, humid environment, leaving users to navigate complex marine regulations and performance issues alone.
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