[VAC] Re: Accumulator Tanks(Optima Batteries)

[Charlie/Betty Burke <burke@xxxxxxxxxx>]

Our customer's experience with Optima batteries has not been all that good.
While their construction makes installing them very flexible, their capacity is
quite limiting. When you go shopping be sure to compare Reserve Capacity Minutes
(RCM) for different deep cycle batteries. You will find the Optima is at the low
end of the scale. RCM is kind of the EPA mileage for deep cycle batteries. It
defines a rate of discharge for a given length of time.(25A per minute). While
one would rarely use a battery at that rate it gives a basis for comparison. An
Interstate Group 27 battery (what Airstream currently uses) has an RCM of 160
minutes.

Charlie