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Old 13-06-2018, 10:18   #16
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Re: Lead acid for house AGM for start

Another vote for connecting all charge sources to the house bank (only), and using an Echo Charge (from house to start) to keep the start battery topped up.

Cheap, install and forget.
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Old 13-06-2018, 10:41   #17
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Re: Lead acid for house AGM for start

@puffcard,
My start is a Optima AGM also about 10 years old and going strong, so no worries.
Like you and others have mentioned, same charge profile as FLAs.
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Old 13-06-2018, 14:21   #18
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Re: Lead acid for house AGM for start

I've also had the same set up for more than 10 years. 4 Trojan 1-105s & an Optima blue top. The Optima outlasts the Trojans 2-1. We just bought a travel trailer & I'm planning on putting an Optima in that too. Does anyone have a good source?
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Old 13-06-2018, 15:35   #19
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Re: Lead acid for house AGM for start

Set you balmar for flooded and you will be fine. As Stu pointed out the charging profiles are very similar.

Greg
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Old 13-06-2018, 16:34   #20
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Re: Lead acid for house AGM for start

I did what you propose a couple of years ago. Wet cell lead batteries for the boat systems (two deep cell 600 AMP batteries), AGM for the starter, ACR combiner. I run it all the time and so far, no problems. As Stu said, the specs look really similar for charging rates.
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Old 15-06-2018, 11:06   #21
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Re: Lead acid for house AGM for start

Yes Echo Charger limits 14.4V, great if you can't find a voltage point that is within range on both banks specs.

If you can then any combiner / VSR / ACR will do
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Old 15-06-2018, 15:21   #22
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Re: Lead acid for house AGM for start

It seems that everyone has enjoyed the same long life with the Optimas that I have. Would using Optimas instead of golf cart 6 volts would make sense? I realize that they cost twice as much.
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Old 15-06-2018, 17:18   #23
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Re: Lead acid for house AGM for start

They were OK for deep cycling back when Enersys developed them.

Since sold off to JCI just another "dual use", not true deep cycling at all.

Basically glorified Starter batts, excellent for that.
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Old 15-06-2018, 18:25   #24
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Re: Lead acid for house AGM for start

Quote:
Originally Posted by john61ct View Post
They were OK for deep cycling back when Enersys developed them.

Since sold off to JCI just another "dual use", not true deep cycling at all.

Basically glorified Starter batts, excellent for that.
Good to know. Makes sense that they are lasting so long because they're not getting deep cycle use.
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Old 16-06-2018, 07:46   #25
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Lead acid for house AGM for start

Good morning
Twin Cummins 5.9s in 34' Tollycraft conv. My project is 5 yo and works great for the PNW. Balmars, not the biggest but almost, 2 Optimas for start. Magnum 2.5 inverter/charger, 8 Dyno D-145 golf cart batteries, all in Dyno batt boxes to be tidy. 980 amp/hr. The additional plus is that the beefy Dynos can be drawn down to 30% capacity w/o degrading lifespan. 3 days in a quiet cove - no problem. http://www.dynobattery.com
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