- ✨【massive capacity for every need】— 12.8v 200ah, 2560wh energy – perfect for rvs, boats, home backup, and outdoor adventures. Powers fridges, lights, communication devices, and more.
- ✨【long-lasting & reliable】— over 3000 charge cycles – 7× longer than lead-acid batteries. Spend less time worrying about battery life and more time enjoying your devices.
- ✨【compact & lightweight】— only 19.5 kg and 367×189×245 mm – 40% smaller and 60% lighter than traditional lead-acid batteries. Easy installation and more room for essentials.
- ✨【safe & efficient】— integrated 100a bms protects against overcharge, over-discharge, and extreme temperatures. Ensures worry-free operation for you and your devices.
- ✨【expandable & flexible】— supports up to 4 batteries in parallel for a combined capacity up to 10,240 wh. Ideal for larger setups, extended off-grid trips, or emergency backup.
⚡all-day energy in just one battery: gentrax 3840wh for your rv, off-grid needs, and emergency backup
✅why you’ll love it?
・3840wh high energy output
・3000+ long life cycles
・200a smart bms protection
・prismatic cells
・60% lighter than lead-acid
・expandable: 4p up to 15,360wh
・2-year warranty & 24h fast shipping
✅ perfect for
・camping & rvs – keep fridges, lights, and appliances running through the night.
・marine & boating – power sonar, navigation, and onboard electronics safely.
・off-grid living – pair with solar panels for reliable, independent power.
・home backup – run essential appliances like routers, fridges, and medical devices.
・work sites & outdoor projects – operate tools and equipment where grid power can’t reach.
⚙️massive capacity, smarter upgrade
enjoy 3840wh of clean, efficient energy — 2× the power and 2/3 less weight than traditional 12v 100ah lead-acid batteries. One gentrax 12v 300ah battery easily replaces three 12v 100ah lead-acid units, giving you higher capacity without complicated wiring. Perfect for long camping trips, off-grid cabins, marine systems, and home backup setups where endurance truly matters.
need more? Expand up to 4 batteries in parallel, reaching an incredible 15,360wh total capacity — enough to power fridges, air compressors, cpap machines, lighting, or even small home systems for days.
✨power your world — choose gentrax 300ah for the energy that never quits.
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### specifications
・brand: gentrax
・nominal voltage: 12.8v
・nominal capacity: 300ah
・watt hour: 3840wh
・approx life cycles: 3000
・battery manage system: 200a
・standard discharge current: 200a
・max. Continuous discharge current: 200a
・max.discharge current (5sec): 400a
・charge voltage range: 14.2-14.6v
・discharge cut-off voltage: 10v
・overcharge protection: 14.6v
・overcharge recovery: 14.2v
・overdischarge protection: 10.8v
・overdischarge recovery: 11.2v
・storage temperature: -10℃ to 50℃
・working temperature range: charge 0℃ to 45℃; discharge: -20℃ to 60℃
・case material: abs plastic
・parallel connection: yes, max 4 batteries
・series connection: no
・warranty: 2 years
### dimensions & weight
・dimensions: l: 520x w: 269x h:220mm
・net weight: 29kg
### what's in the box
・1x lithium battery
・2x terminal bolts m8
・2x insulating covers
・2x screw spring washer
・4x screw washers
・1x user manual