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In the Trojan catalog, they list AGMs at 1,000 cycles at 50% DOD, whereas most models in their flooded Signature Line are rated at 1,200 cycles at 50% discharge. A few sizes in Signature Line only receive a 600 cycle rating at 50% DOD (may want to avoid those). For Trojan brand, it doesn't appear AGMs would last longer.
Prices on these Trojan AGMs seem to run around 50% higher than equivalent-capacity flooded; although at +/- $200 per kWh it's still much cheaper than lithium "retail" prices.
The main reason I have looked at AGMs is to either place them inside the RV, or to place them under the floor where battery access for watering flooded batteries isn't practical.
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