We offer modular renewable energy storage systems at a reasonable price Built for mining crypto, this renewable energy storage system has many applications for off-grid power solutions not just mining cryptocurrencies. We sell renewable energy storage systems to all that are interested. This design is one of many efforts to bring the cost of mining cryptocurrencies down by reducing the cost of electricity. The stackable design allows for batteries to be arranged without expensive shelving. For example, two 24VDC units can be stacked on top of each other. The individual cells used can selected to allow for higher Amp Hour (Ah) applications for instance, using 3.6 amp 18650 Li-ion cells would increase the Ah for this battery to 1,411 Ah.