smkettner wrote:

Costco is about $78 for the GC2 last I checked.

DAS26miles wrote:

Back in 2005, I installed an Intelli converter with the charge wizard in my 2004 class C. The converter has done a great job in keeping my batteries fully charged. We go out once a month for 3-4 days and a long trip in the fall of 10+ days. My disappointment is in the longevity of the Interstate batteries. They come with a 24 month guarantee and that's about all they last.
On our trip this last weekend, the batteries were fully charged prior to our leaving water level still full. It was cold up in Yosemite with the temp dropping down to 24. We only used about 50 amps per day according to my battery monitoring system. I ran the generator for 2-3 hours per day and brought the level up to 80%. It should have been higher for the time run. At night, the voltage dropped quickly down to 12 volts when the furnace was on and a light or two. In the past, it would be about 12.2-12.3. Then last night, it dropped down quickly to 11.8 and this morning before I could run the generator, it was down to 11.4 volts. The battery monitor showed I was down 50% in amp drain. The 2 batteries were 28 months old. Time to get my 4th set. I checked and there isn't enough room for 2-6volt bateries becasue of my compartment size. They would be too tall.
There is a Trojan dealer about 25 miles from me. Is it worth the drive to get Trojan group 24s instead of Interstate?