![]() They woke up in the morning to a dead battery in their camper and their truck. Recently I received an email from a couple that had this very problem. You could use another (Smaller) orion between the multiplus and the starting battery to introduce a proper charging profile if desired.Potential Issues If you Don’t Have A Battery Combiner As long as the voltage is hitting the Orion at greater than 8V (Which would be nearly 50% voltage drop if your alternator is putting out 14V), the Orion will boost the voltage back up to where it needs to be (13-14.whatever)ĬAN you use bigger wire? Sure, I guess… but since 6 AWG wire won’t fit into the terminal… you have to start using junction studs or busbars to make the connection from the bigger wire to the smaller wire which is messy, adds additional points of resistance and failure and ultimately unnecessary for the reason I gave above.Ģ: The multiplus starter battery trickle charge will charge at the same charging profile as the house battery bank. Here’s why… If there is more voltage drop than normal… it’s not a big deal because the entire purpose of the Orion is to boost voltage. Schumacher SC1280 6/12v Rapid Battery Charger/maintainer) into the inverter, and use it to charge the marine batteries while i am driving? that seems easier, and cheaper than buying, for example, the 240-Watt 12-Volt DC to DC Solar On-Board Battery Charger for $118… I’m sure there is a reason I can’t (shouldn’t) do what I outlined, but I can’t figure out what it is!ġ: Use 6 AWG wire for your alternator to Orion connection even though there may be a bit more voltage drop than you are used to. I have 1 marine battery (nothing fancy, just something i bought at Auto Zone) that I use right now for emergency computer use when I am on the road and don’t want to set up the generator (usually gets me through 1 full deadline cycle)… I plan on getting a second marine battery, similar to the first, to have in the new (to me) van, and I keep reading all this about B2B chargers and isolators, and I can’t help but wonder, since i am going to have the 2000 inverter permanently connected to the van’s starting battery, and the inverter housed inside the van, couldnt i just plug my regular battery charger ( ![]() I have a 2,000 watt inverter, that was connected to the starting battery in my old Town & Country… plan on switching it over to the 97 e350 that I am building out for when I am working on the road. I’ve got what is probably a pretty stupid question… but here goes anyway… is there any reason I can’t just use a regular old battery charger?.Scenario. On DC-DC Chargers, this voltage is also programmable so it will work for Lithium, AGM, Carbon Foam, Salt Water, or whatever other battery type you throw at it. If the power from the alternator is hitting the DC-DC Charger at 13.8V and the Batteries need to be charged at 14.6V, the DC-DC Charger will boost the 13.8V from the alternator to the 14.6V the batteries require. ![]() The boost in voltage is INCREDIBLY important for being able to charge higher voltage lithium batteries from alternator that can’t quite put out that much voltage. This decrease in amperage lowers the strain of your alternator greatly and also gives us a solid number from which to work with when being able to accurately determine how many amps the charger will operate at. So, to answer the question: “How fast will my house battery bank recharge while I’m driving?” You could VERY roughly calculate 50% of your alternator size in amps times the number of hours you are driving, and this will tell you how many amp hours will be pushed back into your battery bank.Ĭharging DIY Camper Batteries with a B2B (Battery to Battery) ChargerĪ battery to battery charger takes the voltage and amperage that is being put out by the vehicle alternator and regulates the amperage down to a modest pre-set level and boosts the voltage as necessary to fully charge any batteries. This is also a very rough figure because as the batteries get closer to full, the slower they will charge. This means that if we were pushing 100 amps into our house battery bank over the course of an hours drive, we will have refilled 100 amp hours into our house battery bank. Now… based on real world info gathered from readers of this site, the actual charging rate of a 220 amp alternator is closer to 100 amps. So, if we have a 220 amp alternator… that would mean the most amps we could see coming into our house battery bank is 154 amps. From there, we can estimate that ABSOLUTE BEST CASE SCENARIO we can anticipate a charging amperage of 70% of the nominal alternator output. In order to find out how fast our house batteries can charge from the Alternator, we need to know how big of an alternator we have. ![]() How fast will a Battery Isolator Charge a House Battery Bank from the Alternator? ![]()
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