Thick lead acid batteries of APS Solar are a type of deep cycle batteries that are designed to store energy from solar panels and provide reliable power for various applications. They are made of thick lead plates that are immersed in a sulfuric acid electrolyte and sealed in a durable case. They have several advantages over other types of batteries, such as:

• They are robust, reliable, and cheap to make and use
• They can handle high currents and deep discharges without damaging the battery
• They have a long lifespan of up to 7,000 cycles at 20% depth of discharge
• They are easy to maintain and recycle

However, they also have some drawbacks, such as:

• They are heavy and bulky, requiring more space and support
• They have a low energy density and efficiency, meaning they need more batteries to store the same amount of energy
• They are sensitive to temperature extremes and sulfation, which can reduce their performance and capacity
• They need regular watering and equalization to prevent stratification and corrosion

Therefore, thick lead acid batteries of APS Solar are a good choice for solar storage if you are looking for a low-cost, long-lasting, and high-power battery that can handle harsh conditions. However, you should also consider the weight, size, maintenance, and environmental impact of these batteries before making a decision.