SternWake said:Group 65 is a weird apple being shorter and wider and squatter. They also tend to have higher CCA figures than a battery of the same weight but different dimensions. I'll guess due to wider shorter plates. Somebody more knowledgeable than me said the group 65 plate/acid ratio was a weird mix that did not translate well to a dual purpose flooded battery.
Do you have about 2 more inches of height available? If so you can likely squeeze in a group 29/31 for a good amount more capacity..
Check date codes, A reduced price on a 6 month old battery, is not a deal.
LeeRevell said:Minivans don't have under hood room for a second battery. Size of the chassis battery is limited too.
I feel the added stress of using one to run accessories will further shorten it's life.
LeeRevell said:Minivans don't have under hood room for a second battery. Size of the chassis battery is limited too.
> The starter battery is on the passenger side and there is a battery tray/holder on the driver's side alsoTxjaybird said:Well this Safari Hightop is a whole new critter to me.
Txjaybird said::huh: Well this Safari Hightop is a whole new critter to me. Someone said it was a mini van. Is it? I don't know.
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TO LEEREVELL YOU WERE RIGHT AND I WAS WRONG. THERE IS NO 2nd BATTERY TRAY ON SAFARI!! IF YOU HAVE RECIPE FOR EITHER CROW OR HUMBLE PIE I WILL LET YOU KNOW IF I'M EVER IN YOUR AREA.
In my defense I can only say I must of dreamed it. Really, I'm dealing with a major infected tooth that hurts up to my eye socket, = 2 x differnt antibiotics + heavy duty pain meds & inflamatory meds. It's a bummer because not only no 2nd battery tray the one in there looks rotten and probably needs replacing.
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The first repair he made on the Ranger was $490 less than the highest estimate I'd been given and still $200 less than the lowest. Except tires I've used his shop for 3ys. It's L & K Automotive & Custom Exhaust, Enterprise AL, 334-475-3141. When I can type some more I'll post this in the right forum.
Jewellann
SternWake said:We've drifted from helping Kathleen, into bickering, long ago, but the discussion can be informative for others.
Since most vehicle's voltage regulators are so timid, and will drop from 14.x to 13.x relatively quickly after starting, an upgraded alternator is not really going to make much difference, if any, in most applications where recharging a single or perhaps dual depleted battery is concerned.
A depleted battery might accept 40 amps at 14.7v, but only 10 amps at 13.7v.
The 200 amp alternator will charge no faster than a 100 amp alternator when the battery can only accept a certain amount, and the voltage regulator is seeking only a middling float voltage. Yes there are if's and's and Butt's and exception's with a few qualifying asterisk's involved, but most here will be wasting their money on an upgraded alternator, Unless it is a pre 90's vehicle that came with a 60 amp alternator.
Most vehicles since 1988+, come with alternators rated at 90 amps or higher, so if the depleted battery can only accept 25 amps at 14.7, and there are not 65 amps of other loads, then there is likely no benefit, especially when the thermal protections kick in or the voltage regulator's egg timer clicks and drops voltage to 13.7v instead.
A higher rated alternator should be able to better deal with the heat it generates, when heavily loaded, but a higher rated alternator might only achieve those extra amps at high rpms, and might even be less efficient at low rpms where it is likely to spend the most time.
I say Do not replace a functioning alternator with a higher rated one hoping for better battery charging. this can lead to a false confidence and have little or no benefit. If an alternator fails, then consider upgrading to a higher rated unit, but do not expect any better or significantly faster battery charging, unless one is also running huge electrical loads, like 30 amps of forward lighting and their Hvac motor for another 20 amps., and has a battery bank depleted enough that it would require another 50 amps to be brought to 14.4v.
If one really wanted to maximize the ability of their alternator for the purpose of chrging the battery to full as best as possible in the time on is driving, they would have an adjustable voltage regulator that would seek and hold 14.x volts whenever the battery was anything but 100% charged.
Voltage regulators can be a separate device mounted on firewall, It can be inside the alternator, it can be inside the engine computer depending on the vehicle.
Vehicle manufacturers do not ever consider the voltage regulator needing to perfectly recharge a well depleted battery ASAP. They do not care about achieving battery longevity, nor do they market vehicles that never need any maintenance what so ever. The VR's goal is to keep the battery from being depleted when driving, and to replace what was used to start the engine. They were not designed with a Depleted bank of house batteries tacked onto the end of the circuit, and an anxious van dweller wondering if driving from A to B and back again will be able to power their laptop or Cpap overnight.
If a battery is depleted, and the vehicles voltage regulator only allows 13.7, it matters little whether one has a 60 amp alternator or a 300 amp alternator, as the battery will only accept a small amount of amperage at 13.7v. the exception here would be the vehicular loads outside of the depleted battery, like headlights and blower motor, and also what the engine needs to run ignition and fuel pump.
On my 89 dodge it requires 8.2 amps at idle and 12.2 amps at 2000 rpm to run fuel pump and ignition that is with a fully charged battery. if the battery were depleted the field current to alternator could go upto as high as 10 amps on top of the numbers above, and of course the amperage the depleted battery could accept.
What to do about this glaring deficiency of alternator recharging due to timid voltage regulation?
One accepts it. Any charging is better than no charging, While 13.7 is not ideal for a depleted battery it is so much better than driving and not having the house battery charging at all, or worse, still being depleted powering say a 12vDC fridge or inverter loads.
Or one tries to influence the VR, hoping higher voltages are sought and held longer thereby charging the battery faster, to a higher state of charge before engine shutdown.
Or one bypasses it.
Influencing it.....
..... well that it also extremely vehicle specific, but a cooler battery temperature sensor( if present), can influence it. Also a cooler alternator could influence it. Or a cooler engine computer, perhaps. A cold air intake aimed at alternator can not only possibly raise voltages but it will greatly extend alternator longevity when it is regularly asked to work hard.
..... Thick cables between alternator and depleted batteries might allow the VR to see that a higher field current is required to maintain system voltage, thereby allowing it to hold a higher voltage for longer, perhaps. This is one reason why I recommend people take power right from alternator(+) stud for house battery rather than engine battery. The other benefits are a $horter circuit length, and bypassing the too thin OEM cabling between alternator and engine battery which can throttle amperage into depleted house battery(s).
Obviously influencing the voltage regulator to seek higher voltages for longer just for better battery charging, is not so easy, or a sure thing, and is extremely variable depending on the vehicle.
If one has a dedicated house battery there are DC to DC transformers which will attempt to 3 stage charge
batteries,( turn 13.7 into 14.4), but these are pricey and usually limited to X amount of amps. Some are just 20 amps max, others are 50 amps, and these are generally 300+ dollar devices, and another possible failure point.
Some have thought to use a programmable solar controller in between alternator and house battery, but this should be rated for at least the maximum rating of the alternator or risk the magic blue smoke escaping. See many 100 amp solar controllers?
Some others might hook an inverter to engine battery, which then powers a high amp smart charger hooked to house battery. Problems with this are if the alternator can't, at idle, produce enough juice to power inverter charging the house battery, then juice comes from engine battery, robbing Peter to pay Paul. Inverters do not like being mounted in engine compartment, and since they require pretty fat cabling, this copper might be better off in a direct connection between alternator, solenoid and house battery instead.
Another issue with this method is the inverter is likely ony 80% efficient and the charger is likely only 75% efficient, so much of the alternator output to power the Inverter and charger is wasted, turned into heat. Inverter's can also be electrically noisy and 'might' backfeed the DC system and cause issues with the engine computer. I know of one report where the Van would not run properly when the inverter was running and powering a smart charger charging a house battery. Exception rather than the rule, but a possibility to be aware of.
Last February, sick of my bat crap crazy voltage regulator choosing 14.9v when my battery was full, and 13.7v when it was not, I have chose to trick my voltage regulator mounted in my engine computer. In my 89 dodge with an externally regulated alternator, if the engine computer VR is bypassed, the Check Engine Light comes on, and the computer reverts to a preprogrammed air fuel ratio and spark timing. MPG and power take a pretty big hit and engine runs crustier.
But if a 10 ohm 50+ watt resistor is added in between the original wires that originally went to two alternator field connections, the computer thinks the alternator is still there and does not illuminate the CEL and it applies sensor readings to spark timing and AF ratio.
I then used an external voltage regulator, a transpo540HD, that has an internal potentiometer for adjusting voltage. I removed this potentiometer, soldered wires to the legs, and ran them to a larger potentiometer on my dashboard, next to my voltmeters and ammeter. I also added another heatsink to VR backside with a small 60MM computer fan as I noticed it getting to 120+ degrees when it was asking the alternator for everything with 8+ amps of field current.
I can now choose any voltage between 12.8, and 15.3v, by twisting a dial, but allowing over 14.7v can trigger the CEL and 'limp home' mode where the ECM reverts to preset values on A/F ratio and spark timing.
My ammeter is currently wired to read total alternator current, so I can easily see when it is maxed out for a given rpm. I can tell by experience, but also when more rpms do not raise voltage to my setpoint, or if adding more loads does not increase output.
I could benefit from an alternator that can produce more when the engine is hot and idling, but at 800 rpm or more, a higher rated alternator would do nothing for my small capacity battery bank and electrical loads. if I had more battery capacity, then I would benefit from a higher rated alternator more capable in the 550 to 1100 rpm range, but much depends on the amount of battery capacity and the level of depletion and the health of the battery, as healthy batteries require more amperage to be brought to a higher voltage when depleted.
My alternator is a Chrysler rated at 50 amps idle and 120 amps max, and my ammeter reveals this to be mostly accurate, but my engine idles hot at 550 rpm( factory service manual states 750rpm!?), and max amps there is about 43amps, but at 800 rpm this is in the mid 70's.
For those that made it this far and are interested, I have a more detailed write up with some Pics, on my VR modification here:
https://vanlivingforum.com/Thread-Your-Vehicles-voltage-regulator?highlight=voltage+regulator
I'd love to run all my accessories off solar but I've been told that's not possible. Supposedly there are folks who designed vehicles that ran on water as the only fuel source, but then as the stories go, those folks suddenly disappeared. I've always thought, we the human race, could come up with better systems of transport and mechanisms to drive them. I mean, how can we be so shallow that we drive vehicles with no invisible shield to prevent one vehicle from crashing into another and then humans get maimed and/or die due to lack of such a vehicle buffer component? I swear I must have landed here from another planet where technology was more advanced. Meanwhile, here now as an Earthling, I try to interpret the info above. I have not priced solar panels but how much can they cost??? One line I understand in the msg above regarding solar is "more is better."SternWake said:Sorry about the 6 week thing, I misread the intent, disregard the previous recommendation, unless you cannot find someone local, then just get the jumper pack and go find the person who can.
Way more reliable is a secondary battery as a house battery, and later you can add solar when you possibly get tired of house battery replacement every few months, a solar panel which might fit between your minivan's roof rack Would pay for itself in extended battery life.
For a Minivan, and your stated usage, I would recommend an group 31 AGM properly secured somewhere in the back as a house battery.
These 4, are in my opinion, best group 31 AGMs:
125 Amp hours:
http://www.impactbattery.com/lifeli...battery.html?gclid=CLDxmoamm9ECFQ1ufgodSj8BAg
This one has 20AH less capacity:
https://www.amazon.com/Lifeline-Mar...580&sr=1-1-catcorr&keywords=lifeline+gpl-31xt
https://www.amazon.com/NorthStar-Ul...080301&sr=8-1&keywords=northstar+group+31+agm
https://www.amazon.com/Odyssey-31-P...83080330&sr=8-1&keywords=odyssey+group+31+agm
Mid range quality:
https://www.amazon.com/VMAXMB137-Ba...8&qid=1483080017&sr=8-5&keywords=group+31+agm
This is one of the most budget oriented 12v AGM's. Know someone with a Sams club card?
http://www.samsclub.com/sams/durace...32&selectedTab=allProducts&_requestid=5483729
That battery is a Deka Intimidator AGM. If treated properly, it is only rated at 1/3 (total the cycles to 50% charged) of the Lifeline, BUt if both were to be treated poorly( chronically undercharged), it will likely last 3/4th the total amount of cycles of the Lifeline.
It is likely about the same quality as this:
https://www.amazon.com/110Ah-Batter...=1483080391&sr=8-1&keywords=UPG++group+31+agm
One should put the battery in a battery box like this, and make sure it is properly secured to floor or seat anchors:
https://www.amazon.com/Camco-55373-...F8&qid=1483079433&sr=1-3&keywords=Battery+Box
https://www.amazon.com/NOCO-HM318BK...rd_wg=rStaZ&psc=1&refRID=VRC46XVPN5GW51XKCHW5
https://www.amazon.com/Newport-Vess...F8&qid=1483080715&sr=8-4&keywords=battery+box
https://www.amazon.com/UPG-40790-Bl...rd_wg=v23LI&psc=1&refRID=GNK42CGPJY003413FP0B
Those 2 or3 accept group 24 and 27, not group 31 batteries. buyer beware.
I would also recommend the AGM be fed with no thinner than 6awg cable from the alternator, through one of the many 'isolating' devices available to protect engine battery from house battery loads.
Hook this harness to alternator (+) and mounting bolt(-)
https://www.amazon.com/Keeper-KTA14...sim_263_1?ie=UTF8&refRID=147ND97WNXYBJX94R5M6
With this connector on this trailer harness above, you can easily disconnect the whole house battery box from the vehicle's alternator. You 'could' connect to drive, and disconnect when parked. But there is the human error factor to deal with.
If you wanted the higher$$ AGM batteries, those 'should, ideally' get fatter cable as they have no amperage limits when recharging, but, the les$er AGM's should likely not be allowed to suck on 4awg or thicker cables from alternator at ~10 feet one way distance. Top quality 4awg or thicker custom cables cables can be acquired here :
http://www.genuinedealz.com/custom-cables
Below, is an Automatic voltage sensing relay. As soon as it sees charging voltages from alternator, it closes the circuit and charges house battery. Soon as voltage falls below a certain limit, after engine is turned off, it automatically separates.
http://www.allbatterysalesandservice.com/browse.cfm/4,2705.html
https://www.amazon.com/Bussmann-RB-...=1483081276&sr=1-4&keywords=battery+separator
There are literally dozens of different products and methods for protecting engine battery from house loads and charge while driving. The linked product above requires no tapping of a live 12v ignition circuit which allows the use of a cheaper continuous duty solenoid.
These isolating devices need not be in engine compartment on firewall, or next to alternator, they can be next to house battery, perhaps even mounted on the plastic battery box itself, with a fuse inbetween house battery and solenoid which then goes to the alternator directly. IF the wire goes instead to engine battery which is the more common method, but causes slower recharging), then another fuse is required next to that battery.
One of those basic battery boxes above can be customized with USB outlet, 12v outlets and voltmeter.
YOu could have a mechanic properly mount the battery box in back, properly run the fused cables through floor to alternator (+) and mounting bolt(-), and wire up the voltmeter, 12v power port, and USB outlet, and have a pretty reliable system, as long as you drove each day, or generally keeping the house battery above 12.1 volts.
If you ever get to plug into the grid a regular smart charger of 20 amps or higher, would go a long way in extending battery life, as it simply takes so long to get a battery recharged to 100% full, especially one which has not gotten there for a long time.
Which plug in charger I would recommend depends on which battery you get, but any plug in charge is better than no plug in charger.
Later on, if one gets tired of having to drive, or perhaps just Idle when parked, to keep the battery from going much below 12.1v, Solar can easily be incorporated, and take up the slack.
Any solar is better than no solar, but more is better. Size panel(s) to roof racks. Shoot for 2 watts per 1Ah of battery capacity, but the fridge alone will need no less than 60 watts in good sunny shade free weather to break mostly even.
Thank you for clarifying the various kinds of batteries in a way that my simple mind could understand!Optimistic Paranoid said:Let's start by defining a charge cycle. A charge cycle is where you draw a certain amount of power from a battery, and then fully recharge it. Hold that thought.
There are three types of batteries. Engine starting batteries, RV/Marine batteries, and true deep cycle batteries. Engine starting batteries are built with lots of THIN lead plates. The idea is to get the maximum amount of square inches of lead in contact with the acid. This provides the maximum cranking amps. They are designed to start your vehicle - which may take them from 100% charge down to 95% charge. The alternator then brings them back up to 100% while providing power to run all the electrical/electronic stuff on your car while you are driving.
Deep cycle batteries have much thicker lead plates. They are designed to maximize the number of charge cycles you get from them. They are designed to routinely be drawn from 100% down to 50% before being recharged. Good ones will give you 1,000 or more such cycles. If you started drawing engine starting batteries down to 50% before recharging, you'd be lucky to get 40 or 50 cycles out of them before the battery fails.
RV/Marine batteries are a hybrid between the two. They were designed for use on boats, where they not only had to start the engine, they also had to power the anchor lights all night when the engine was off. They are usually good for 400 to 500 charging cycles.
Bottom line here is that a "heavy duty"engine battery usually just means it has more cranking amps, NOT that it will stand up to more charging cycles than a standard engine battery. For what you're trying to do, you should get an RV/Marine battery installed.
Yes, that's just the issue. I want to do a lot of stationary boondocking in beautiful nature without having to run into town a lot. Thanks for summing up the issue. I will check that link.John61CT said:You can, just time, knowlege & money, where there's a will there's a way.
Note travelling around regularly gives you lots of free electricity, still a challenge to optimize deep-cycle recharging from stock alternator / regulators.
And stopping in campsites with shore power makes things very painless!
But it's *stationary* boondocking with heavy usage that requires really unusual measures.
Check this guy out, he's the real deal:
https://handybobsolar.wordpress.com/the-rv-battery-charging-puzzle-2/