Quote:
Originally Posted by julianh72
The actual effective capacity of an SLA depends on the average current drawn from it.
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That's right, the advertised capacity is only valid for slow discharge. The higher the discharge current the lower the capacity will be. Even with slow discharge you will not be able to extract more than half the capacity from an SLA battery without damaging it eventually.
AGM deep cycle batteries can be discharged a lot further, repeatedly, without flinching, that's why they're usually preferred as a power source in this kind of application (also in wheelchairs, golf buggies, etc).
Cheers
Steffen.