Dear Customer,
After careful consideration of our long-term business direction, geekmaxi.com will be discontinuing operations as an online store. As of August 21, 2026, we will no longer be accepting new orders.
Looking ahead, we are working with a number of established retail partners so that our customers can continue to find the products they've come to know from us. More details will be made available on our homepage.
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Over 4000 times Deep Cycle Use
SUNHOOPOWER 12V 300Ah lithium batteries have a low self-discharge rate and can be deep-cycled more than 4,000 times without failing, providing a long service life compared to traditional lead-acid batteries, which only last 200-300 cycles, and standard lead-acid batteries, which have a service life of 8-10 cycles. 300Ah lithium batteries weigh only 56.8 lbs. (25.8 kg), which is 1/3 the weight of a lead-acid battery, and are much lighter and more portable. It is relatively lightweight and portable.
Superior 200A BMS
The 12V 300Ah Li-FePO4 battery has a built-in 200A BMS (Battery Management System) that prevents overcharging, deep discharging, overloading, overcurrent, overheating and short-circuiting, which prolongs the service life of the battery and makes it safer. 2560W maximum load power allows us to connect to more common electrical appliances at the same time, which can fully satisfy your multiple needs.
Maximum 61.44KWh Capacity Expansion
SUNHOOPOWER 12V 300Ah lithium batteries can be connected in parallel and series to get more capacity and voltage. Maximum Series Capacity: Up to 4 identical batteries can be connected in series, voltage up to 48 V. Parallel Connection: Multiple batteries can be connected, it is recommended to connect no more than 4 batteries in parallel. Expansion to 4S or 4P is permitted for capacities up to 1200Ah or voltages up to 48V (51.2V). Maximum energy is 61.44kWh; maximum load power is 40.96kWh. load power is 40.96kW.
Powerful and Widely Applicable
As lithium batteries can be simply and conveniently connected in series and parallel as needed, 12V 300AH Li-FePO4 batteries are very suitable for off-grid solar energy systems and outdoor applications, such as home back-up power supply, caravans, camping, sailing and so on.
Strong Safety Guarantee
Li-ion batteries are made of stable lithium iron phosphate chemical structure, which is safer as it will not burn or explode even under high temperature, short-circuit or impact conditions.






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