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Old 11-30-2010, 01:38 PM   #15
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I suppose with a perko switch I could use the 2-6 volts as primary house power and use the 12 volt as back up, unless charging them all together is an issue.
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Old 11-30-2010, 01:50 PM   #16
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I suppose with a perko switch I could use the 2-6 volts as primary house power and use the 12 volt as back up, unless charging them all together is an issue.
Was just thinking that.. Not sure if it can be used as a 'fail over' switch, but something like that would be cool.. the 6v's drop to around 40%, voltage drops, relay kicks over to power from the 12v, lights LED warning. Would be just the ticket.
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Old 11-30-2010, 01:55 PM   #17
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I have 2 of these Lifeline Batteries - Marine & RV Deep Cycle Batteries. A little pricey but we can keep the heater set a 55 degrees at night with no problem. An extra blanket if needed.
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Old 11-30-2010, 01:59 PM   #18
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Cool indeed!
Check out the Morningstar RD-1
I use it to do a lot of special voltage sensing and driving external equipment.
A nice mechanical latching relay would easily isolate the batteries, while the RD-1 did it's job sensing the voltages and durations

Ken
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Old 11-30-2010, 02:13 PM   #19
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Cool indeed!
Check out the Morningstar RD-1
I use it to do a lot of special voltage sensing and driving external equipment.
A nice mechanical latching relay would easily isolate the batteries, while the RD-1 did it's job sensing the voltages and durations

Ken
So does the RD-1 allow switching between BATT banks and if the backups get low then switch to the genset? Could it also handle adding Solar into the mix?

Would seem to me that the coolest setup would be to run off BATT, switch to backup BATT if needed (low primary BATT) OR solar if available.. if neither is available/low, then last resort would be the genset.
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Old 11-30-2010, 03:31 PM   #20
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I have 2 of these Lifeline Batteries - Marine & RV Deep Cycle Batteries. A little pricey but we can keep the heater set a 55 degrees at night with no problem. An extra blanket if needed.
So you have 300 AH in a small space, that would work. I was afraid to call about pricing.
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Old 11-30-2010, 04:02 PM   #21
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One place I looked was $399
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Old 11-30-2010, 04:08 PM   #22
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That's what I was afraid of. Think I will go back to the idea of adding 2-6 volts with perko switch. I need to keep costs down to a few hundred bucks.
If charging all 3 together is an issue I could isolate and charge the single 12 volt with an auxiliary battery charger.
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Old 11-30-2010, 04:10 PM   #23
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Anyone ever use ThermOil?

BatteryDe-Mister.com - Up to 3 times Longer Battery Life! Guaranteed.
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Old 11-30-2010, 04:13 PM   #24
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My understanding is this product adds a layer over the electrolyte to keep the batteries from boiling/misting out the vents. Similar to mineral oil.
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Old 11-30-2010, 04:19 PM   #25
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So you have 300 AH in a small space, that would work. I was afraid to call about pricing.
They were $340 each in Quartzite in January. It was the most amps I could get in the space I have.
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Old 11-30-2010, 10:11 PM   #26
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They were $340 each in Quartzite in January. It was the most amps I could get in the space I have.
my 2 lifeline agm's cost $360 each delivered in 2007. they have been working well. i got the big ones and mounted them on their sides for clearance in the stairwell battery compartment. i went from 2 12v batteries in parallel at 190 ah capacity to 300 ah capacity. i have pictures in a previous post.
when its really cold i can run my furnace, tv's and lights for at least 1 night using about 150 ah of the battery banks capacity. it is best for these expensive batteries lifespan to limit how deep they are discharged. using more than half of a batteries capacity is called deep cycling and limits the lifespan of a battery.
i try to keep the moho at 68-70 degrees inside and we use a 12v mattress warmer from backwoods solar.

http://www.phrannie.org/battery.html
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Old 11-30-2010, 10:18 PM   #27
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my 2 lifeline agm's cost $360 each delivered in 2007. they have been working well.
maybe they will continue to drop in price.
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Old 11-30-2010, 10:27 PM   #28
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maybe they will continue to drop in price.
i think they are about $399 each on bd batteries website now. that's where i got mine.
they are kinds pricey but if taken care of properly and not deep cycled often will last 10 years or more. that makes the initial price more palatable.
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