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Here is a quick test before you arc weld something, if you are ever in doubt as to what is going to happen when you connect that last wire/complete the circuit. Connect a volt meter in place of the last wire you are going to connect in the circuit. You must have a difference in...

I think he mis-understood your drawing, the connection points look OK for adding the 3rd in parallel with the 0-12v service battery. Maybe he thinks those lines are connected instead of just drawn over each other… batteries often mess people up, particularly series and parallel. Everything...

Tap into the line between the panel and the house controller. You want raw DC to feed the small controller to the 3rd battery the same as it feeds the house system. Dc to dc converters work best when there is a voltage difference so you dont want to use the output of the house converter which...

The supply power for the converter/charger comes from your raw panel output(between panel and existing house solar controller). The output of the converter charger connects to the 3rd battery. Only 10A, no 2/0 cable anywhere in this part. yes you could tie the 3rd battery to the 12v side in...

Well there are lots of dc-dc supplies to choose from, for a standalone battery this size that will see service i would want at least 10A. Here are some amazon search results, you want an adjustable output voltage so you can set an appropriate float voltsge...

You might be able to do that, add the 3rd 6tl to the house system. What kinda house batteries are you running? Back to the mismatch battery thing, it could, if too large a difference in capacity/design from the house batts, could effect the overall balance and charging of your house system…...

4 batteries were chosen to meet a particular milspec requirement like being able to set for a month on the Siberian step in wintertime and still be able to crank the engine long enough to start it with no supplemental heat. Un fortunately the person designing the electrical system wasn’t in on...

Why dont you just take the two best of the three 6TL’s that have 12.98 at rest and install just them? A pair of 6tl’s is way more than the engine/starter needs… They will charge faster and maintain a higher state of charge and your alternator will not be working as hard…

Correct, except the 2x as long to charge part. That would only be true if you are charging at the same wattage input for both voltages. IE: A 12V@100Amp alt is 1200W. A 24V@ 100A alt is 2400W. Now if your 24V alt is only 50A/1200W, then yes, the 24V will take twice as long to charge the...

No, Amp hours is the wrong term to express the amount of energy storage gained in series... IE: A 12V 100AH battery would support a 12V@10A load for 10 hours. Two 12V 100AH batteries in series to make a 24V battery, would support a 24V@10A load for the SAME 10 HOURS... It is twice the amount...

The 6TL’s I have are 120AH(says it right on the lable).. AH capacity is only additive in parallel, just like voltage is only additive in series, so the 4 battery bank on the LMTV is 240AH... a pair in series would be 120AH... The limiting factor for charging a battery, is the same as for...

On my A0 all the cables come in from the upper left. On mine the 4 connector 12v cable was made up of bolt together 2 terminal units. I reused one of these for my 12-24 jumper between the 2 batts...

The 12V cable is the one that has 4 battery terminal connectors on it:) the others y0u can kind of determine by their length. The ground linees need to be long enough to reach the front of the tray, while the 24V lines are fairly short as the 24V terminals are all the way in by the frame...

A batteries current output capacity is determined by it’s ability to convert chemical to electrical energy. More plate surface area = more current capacity/CCA Absorbed Glass Mat batteries accomplish the chemical to electrical transfer more efficiently than plain plates so for a given size...

It wasn’t engineered, it was built to a milspec... IE: what is the cheapest way we can build this thing and still get uncle sugar to sign off on it... By any common automotive standard, the 4EA 6TL battery bank is more than twice as large as it should be for the alternator, or the 100A...