Most of the generators we see installed by other firms have traditional flooded batteries due to the cost. On average, a flooded battery is half the cost and lasts 3 years with continued maintenance. We have seen AGM batteries last over a decade. More importantly, if the focus is reliability, then AGM batteries are the obvious choice.
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What are AGM and wet batteries, and how do they differ from each other?
Absorbent Glass Mat (AGM) batteries and flooded batteries are two distinct types of lead-acid batteries, each with its own advantages and disadvantages. When it comes to powering a whole house generator, AGM batteries often have the upper hand for several reasons:
1. Maintenance:
AGM Batteries: AGM batteries are virtually maintenance-free. They are sealed, preventing electrolyte leakage and evaporation. This feature is especially important for whole house generators, as it eliminates the need for regular water top-ups and reduces the risk of acid spills and corrosion.
Flooded Batteries: Flooded batteries require consistent maintenance, including checking and topping up water levels. Neglecting this maintenance can lead to decreased battery life and reduced generator reliability, which is less desirable for a whole house generator.
2. Safety:
AGM Batteries: AGM batteries are considered safer due to their sealed design. They are less likely to leak acid or release hazardous gases during operation, making them suitable for indoor or enclosed installations.
Flooded Batteries: Flooded batteries can pose safety risks because they contain liquid electrolyte that can spill or emit hydrogen gas during charging. This may necessitate additional safety measures and ventilation in the generator housing.
3. Durability and Vibration Resistance:
AGM Batteries: AGM batteries are more durable and shock-resistant because of their sealed construction. They are better equipped to withstand vibrations, making them suitable for whole house generators that may need to operate in various conditions.
Flooded Batteries: Flooded batteries are more susceptible to damage from vibrations and physical shocks, which could impact their reliability over time.
4. Deep Cycle Performance:
AGM Batteries: AGM batteries are known for their excellent deep cycle performance. They can handle frequent discharges and recharges without suffering from the "memory effect" or significant capacity loss.
Flooded Batteries: While flooded batteries can also provide deep cycle performance, they may require more maintenance to maintain their capacity, which is less practical for whole house generators that need to be reliable during extended power outages.
In conclusion, AGM batteries are often considered superior for whole house generators due to their maintenance-free, safe, and durable characteristics. While they may have a higher upfront cost compared to flooded batteries, their reliability, ease of use, and long-term cost savings make them an excellent choice for homeowners seeking a reliable power source during extended outages. AGM batteries ensure that your whole house generator is ready to provide uninterrupted power when you need it most.
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