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Portable Energy Storage


Large Energy Storage is the dominant theme for 2018 and the upcoming decade. From remote power to industrial and military applications, the need for continuous or UPS in far off locations continues to be on the rise. RPE has recently created a 48V 170Ah solution for a remote lighting application for construction sites as well as a 48V 650Ah for large remote power -- both solutions being portable. RPE's strong partnership with leading electronics companies allows for the right integration with generators, solar power, inverters with Battery Management Systems (BMS). The experience finding the right cell, pack and integration partner is key and RPE is at the cutting edge of providing the power component for a large unmet need.

The system is environmental friendly and energy-saving. It is a combination of solar power generation system and wind power generation system. It works as that energy will be generated by solar during the daytime.


Battery energy storage systems are typically configured in one of two ways: a power configuration or an energy configuration, depending on their intended application.

In a power configuration, the batteries are used to inject a large amount of power into the grid in a relatively short period of time, which requires a high inverter-to-battery ratio. A typical application would be to simulate a turbine ramp up for frequency regulation, spinning reserve, or black start capacity.


In an energy configuration, the batteries are used to inject a steady amount of power into the grid for an extended amount of time. This application has a low inverter-to-battery ratio and would typically be used for addressing such issues as the California “Duck Curve” in which power demand changes are occurring over a period as long as several hours, or shifting curtailed PV production to later in the day. 


This is accomplished by adjusting the ratio of inverters to batteries in the system. Imagine a bathtub, with the volume of water in the tub representing the batteries and the tub drain(s) representing the inverter(s). For a fixed level in the bathtub, several drain lines can be incorporated, resulting in a rapid discharge (a power configuration), or a single drain line can be incorporated resulting in a slower discharge (an energy configuration). In each case, the system has the same amount of water (stored energy in the battery), but the discharge rate is varied.