Extra-Long Life & LightweightSUNHOOPOWER 12V 300Ah lithium battery has a low self-discharge rate and can be deeply recycled more than 4000 times without failure while traditional lead-acid batteries only 200-300 times the service life of standard lead-acid batteries is 8 to 10 times. 300Ah lithium battery weighs only 56.8 lbs (25.8kg) 1/3 the weight of lead-acid batteries.Bulti-in 200A BMS12V 300Ah LiFePO4 battery built-in 200A BMS (Battery Management System) which can protect it from overcharge deep discharge overload over-current over-heating and short circuit. The 2560W maximum load power allows us to connect more common applications at the same time.Max. 61.44KWh Capacity ExpansionSUNHOOPOWER 12V 300Ah lithium batteries can be connected in parallel and series for greater capacity and voltage. Maximum Series Capacity: Up to 4 identical batteries can be connected in series voltage up to 48V. Parallel: Multiple batteries can be connected it is recommended to connect no more than 4 batteries in parallel. Allows expansion to 4S or 4P for up to 1200Ah capacity or up to 48V(51.2V). The Max. energy is 61.44kWh; Max. Load power is 40.96kW.Multi-ApplicationBecause lithium batteries can be simply and easily connected in series and parallel as you need 12V 300AH LiFePO4 batteries are perfect for off-grid solar systems and outdoor applications such as home backup power RVs camping sailboats and more.More SafelyThe lithium batteries are made of stabilized lithium iron phosphate chemical structure which will not burn or explode even under high temperature short circuit or impact conditions making them safer.