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Author: Subject: water in batteries way low?
Hook
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[*] posted on 10-20-2014 at 08:50 PM


To paraphrase the old Manny Ramirez saying..........it's just Bob being Bob. :lol:

Temp sensors are bogus?
Hot batteries need more juice?
All controllers float at the correct voltage?

Egad!!! He's the Cosmo Kramer of the Nomads board.

What's your longest time away, Santiago?

There is no doubt that a high ambient temperature will reduce the life of most any battery, especially a conv. lead/acid battery. Probably the heat and possibly a high float voltage is draining those batts of liquid. If your controller senses sulfation and has a de-sulfation cycle, there goes more liquid.

If you're floating more than 13.4, see about reducing the float voltage.

Only measuring your specific gravity will tell you if there are cells that are toast.

I'd go AGM, if you have to replace them. Assuming you are there in six months and arent powering anything significant, just top them off and don't float them. Disconnect and let them sit. Many AGM mfgrs recommend this. They only lose about 1-2% per month.

I bought a "cheap" Chinese AGM at Batteries Plus about three years ago. I topped it off with a good bulk, absorption, float cycle (at 13.2) before I left and when I returned, it read 12.85. And it had certainly sat in some 95-100 degree temps. It was off the charger almost three months.

Oh yeah, and you can bone the Giants. NFD (no plucking dynasties!!).

Go Royals!!!!
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landyacht318
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[*] posted on 10-20-2014 at 09:16 PM


When batteries are not cycled nightly, then they do not need to be held at absorption Voltage each day for any amount of time. At absorption voltageor higher. And especially when hot ambients exist is when they use the most water.

When you leave and no longer cycle the batteres, Reprogram absorption voltage down to float voltage. Or if you have a duration option. Set 14.2v for no more than 15 minutes.

When you return and start cycling the batts. Return absv to normal for about 2 hours.
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Paulina
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[*] posted on 10-20-2014 at 09:41 PM


Quote:
Originally posted by Santiago
Just to be clear, as soon as the coffee is brewed I turn it off and keep the coffee in an insulated carafe.


So, what time is coffee usually ready?

P>*)))>{




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Hook
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[*] posted on 10-20-2014 at 10:19 PM


Please tell me you off-the-grid guys aren't REALLy using elec. to make coffee?
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captkw
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[*] posted on 10-20-2014 at 11:38 PM
batts...omg !!


one of the MOST understood things around !! lets deal with the most common type : flooded lead cell...a float charge is normaly 13.2 V (mantanice)...charging is up to about 15 V and gassing will occurs (sulpher) on leads plates hopefully be removed (not guaranteed) and NEVER let you batts get below 12.6 V BTW heat is a big killer of this type of batt and a temp sensor is a very GOOD thing...not a BS gig at all.....I deal with batts daily in my biz and the stuff I see is.....f,ing nuts !! there is NO outboard mad
e to run a deep cycle...FACT !!! last month I replaced 4 stators due to the most common marine misconception !!! I know someone will TRY and argue with this simple FACT!!!:cool:
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Santiago
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[*] posted on 10-21-2014 at 05:43 AM


Quote:
Originally posted by Hook
Please tell me you off-the-grid guys aren't REALLy using elec. to make coffee?

heh, I know, but I have lots of excess right now. If I ever get another freezer then that will have to go and I'm back to stove-top.

Very strange WS for sure - I would have bet on a So Cal freeway series.....can anyone explain the Dodgers????
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rts551
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[*] posted on 10-21-2014 at 08:20 AM


Quote:
Originally posted by captkw
one of the MOST understood things around !! lets deal with the most common type : flooded lead cell...a float charge is normaly 13.2 V (mantanice)...charging is up to about 15 V and gassing will occurs (sulpher) on leads plates hopefully be removed (not guaranteed) and NEVER let you batts get below 12.6 V BTW heat is a big killer of this type of batt and a temp sensor is a very GOOD thing...not a BS gig at all.....I deal with batts daily in my biz and the stuff I see is.....f,ing nuts !! there is NO outboard mad
e to run a deep cycle...FACT !!! last month I replaced 4 stators due to the most common marine misconception !!! I know someone will TRY and argue with this simple FACT!!!:cool:


I have no choice but let my batteries go below 12.6 when they are under a heavy load...especially at night. but they are not in my boat either.
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[*] posted on 10-21-2014 at 08:50 AM


Quote:
Originally posted by Hook
Please tell me you off-the-grid guys aren't REALLy using elec. to make coffee?


It all depends on how much capacity your system has. I make coffee with electricity, I also run a 1 ton mini split AC unit in the summer time at night. I also have 7000 watts of panels, 7200 watts of inverter power(Outback) and 1160 ah of 48 volt HUP battery. Next I'm going to try to power an RO system to make my own fresh water. That will need another 2 kw of panels.




Living Large in Loreto. Off-grid and happy.
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larryC
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[*] posted on 10-21-2014 at 09:01 AM


Quote:
Originally posted by ncampion
Quote:
Originally posted by Hook
Please tell me you off-the-grid guys aren't REALLy using elec. to make coffee?


It all depends on how much capacity your system has. I make coffee with electricity, I also run a 1 ton mini split AC unit in the summer time at night. I also have 7000 watts of panels, 7200 watts of inverter power(Outback) and 1160 ah of 48 volt HUP battery. Next I'm going to try to power an RO system to make my own fresh water. That will need another 2 kw of panels.


ncampion
That is a huge battery bank! That is also a huge array. Good for you. Love to see your system sometime. Are you going to try the RO system just to see if you can do it or is drinking water that expensive down there that it will cheaper to make your own?
Larry

Hook
I also use an elec coffee maker, usually just one pot in the morning.

[Edited on 10-21-2014 by larryC]




Off grid, 12-190watt evergreen solar panels on solar trackers, 2-2812 stacked Outback inverters, 6-2v enersys 125-33 2000 amp hour AGM batteries, FM 80 and MX 60 Outback charge controllers, X-240 Outback transformer for 220v from inverter, 6500 watt Kubota diesel generator.
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rts551
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[*] posted on 10-21-2014 at 09:03 AM


OK.. I'll admit it. I use an electric coffee pot as well... Maybe thats why my batteries dip below 12.6v sometimes.:lol:
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ncampion
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[*] posted on 10-21-2014 at 09:17 AM


Quote:
Originally posted by larryC

ncampion
That is a huge battery bank! That is also a huge array. Good for you. Love to see your system sometime. Are you going to try the RO system just to see if you can do it or is drinking water that expensive down there that it will cheaper to make your own?
Larry

Hook
I also use an elec coffee maker, usually just one pot in the morning.

[Edited on 10-21-2014 by larryC]


Larry, come on down our way any time to see the system. We get our water by pipa (water truck) and they are easily the most unreliable people in town. It's not expensive but it is the source of much frustration trying to guess if the truck will show up or not. I like being self sufficient and water is the remaining tie with outside service. Oh, I take that back, we also get propane delivered but they are totally reliable and we only need it about every 3 - 4 months.

.




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larryC
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[*] posted on 10-21-2014 at 09:57 AM


You guys have it so easy down there. If we want water, pila water, we either have to go get it ourselves or pay a $100 US to have it delivered. Propane is delivered but not very reliably. Sometimes they don't show up for 2 or 3 months. People using small tanks can exchange them in town but those of us with the stationary tanks need the truck. Anyway someday I just may show up down there and see your stuff on my way to Agua Verde.
Larry




Off grid, 12-190watt evergreen solar panels on solar trackers, 2-2812 stacked Outback inverters, 6-2v enersys 125-33 2000 amp hour AGM batteries, FM 80 and MX 60 Outback charge controllers, X-240 Outback transformer for 220v from inverter, 6500 watt Kubota diesel generator.
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