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I think I'll take the advice of an Odyssey engineer over somebody who equates a sulfated battery with a rusted battery. They have an Indepth charging PDF specifying a 40% charge rate on a depleted battery for maximum performance and longevity, but it is to be disregarded on your say so? Do you...

I don't believe how quickly voltage falls after a charging source is removed is the be all end all of determining a battery's condition. But if it drops fast completely disconnected from all loads, that is a certainty it is bad, but if it does not, does not necessarily mean it is good. A...

It will take it, but amps will taper pretty quickly. I was rather surprised to see 40.94 amps from my MeanWell power supply when plugging it into a battery with only 4 AH removed from it, but within 30 seconds amps were in the 15 range, and after a minute down to 7 or so. My Northstar group 27...

I spoke at length with an Odyssey engineer, and he was rather adamant that a deeply discharged Odyssey simply needed the 40% charge rate, or 40 amps for their group 31 battery rated at 100 amp hours. He said that lower charge rates would not return their deeply cycled battery to maximum energy...

Odysseys are great batteries, but when deeply cycled they need specific charge protocol, and few alternators are going to meet this. So a group 31 discharged to 50% needs 40 amps until 14.7v is reached. 14.7v is then to be held for 4 hours or until current required to maintain 14.7v falls...

Frame grounds tend to deteriorate, and yet appear fine and tight upon visual inspection. When Unthreaded one finds the mating surfaces white and oxidized. Make super shiny both mating surfaces, and cover with grease after rethreading to prevent oxidation. +1 on adding an additional battery...

If a 0.5v drop is acceptable to Blueseas on their ACR, then I am no longer using any BlueSeas products and redacting all previous praise of their products. That much voltage drop is huge and will increase charging times drastically.

Sounds like the battery gave up the ghost, but I would confirm that juice is making it through the ACR. Congrats on using 2awg cable through it. if you are taking power from the starter batter for the ACR, consider that the weak point then becomes the original starter battery charging circuit...

How thick is wiring through the Blue seas ACR and to Aux battery? I don't care what some say about thin wire ampacity being adequate, when this wire is too thin, the depleted Aux battery is not adequately 'seen' by charging source and voltage regulator, and not charged at a good rate, and 10...

Even the venerated Enersys can put out a substandard battery, but you need to determine that no parasitic draws exist on the battery. One more common failure of batteries is owners who assume a 15 minute drive across town is enough to fully charge a battery. Or the owner who thinks that you can...

You cannot fire up the truck and top off the battery fairly quickly, unless you consider 4 to 5 hours of idling fairly quickly. Chromed alternators included. Top charging a battery takes hours, no matter the charging source. Surface charge voltage after a charging source is removed especially...

Is there any requirement for heat dissipation which will be affected by the adding of a spacer? If so, I'd make sure the spacer fit the housing tightly and employ some thermal grease like arctic silver 5 on mating surfaces Not familiar with HID bulbs, except for the anger they induce when I am...

Wonder if that is how Odyssey can Justify putting one of their batteries into a Sears Diehard Platinum case, which sells for so much less. Perhaps they save manufacturing costs on the case, or Perhaps people are seeing the brass studs/ posts and busting out their 3 foot breaker bars to...

This is dependent on the charging algorithm of the charger. Some of them will go well over 15 volts, and this range can indeed threaten some electronics. My Schumacher sc2500a will go over 16 volts. Lots of schumachers will. Most manual chargers will if given enough time. Also if using a...

I am not familiar with the goal zero product so no help there. Your big power usage is going to be the Mac. A few hours a day post processing photos can eat up a good portion of a large battery. Computers consume more juice when doing intensive tasks and post processing photos might be...

I have a single group 31 battery I use as house battery and it is rated at 130 amp hours. Look into the peukert effect. it basically says the higher the load on the battery, the less capacity the battery has to give, and a 18 amp load is a big peukert component an a hundred amp hour battery...

I have a 200 watt heater that draws 18 amps when powered by my inverter. In 3 hours my group 31 battery is well below 50% Rethink electrical heat. The 200 watt heater can barely take the edge off of a cool night in the high 30's and keep my lightly insulated Van in the low to mid 50's.

A ran a 2 awg cable from my common stud on the battery switch to the original (+) engine battery clamp, which of course is no longer on the engine battery. I could easily return it to stock if I wanted to. I use 3 switches, one for the ignition, one for the solar, one for all the loads. This...

Please note that when devices indicate 100% state of charge, they are wrong 99% of the time. Those with flooded batteries can test specific gravity, but AGMs are different. for example regarding 100%, my solar charge controller, when it requires less than 1 amp to hold 14.9v, it considers the...

99% of people have no idea what is going on inside a battery. It works until it does not. If a battery has only 80% of the original capacity, and the user only needs 50%, they have no idea that the other 20% is gone. They might even brag how the battery is still like new. If the battery...