To meet the demand for long-term continuous operation of photovoltaic energy storage, 2V lead-acid batteries have exclusive performance advantages adapted to energy storage scenarios. Different from ordinary starting batteries, photovoltaic special 2V lead-acid batteries optimize the plate structure and electrolyte formula, with a high charging acceptance rate and a charging efficiency of over 92% at 0.1C current, which can quickly absorb instantaneous photovoltaic power generation. The structural design of tubular positive plates combined with nano-colloid electrolyte effectively inhibits battery aging and slows down capacity attenuation. The battery has excellent floating charge performance, stable performance under long-term grid-connected energy storage, and is not prone to thermal runaway or bulging failure.