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    Correct size battery cables

    Hello all, I have a set up where the cables between the batteries are equal, and the cables from the positive and negative to the bus bar are equal, but they are longer than the ones that the are between the batteries. I think it's called split feed. The other way is common point connection...
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    Lithium battery lower voltage during freezing weather?

    Hello everyone, Something very strange happened to me. After a camping trip I left the battery bank at 75-80% SOC at around 13.2 volts. I had left 2 lamps that draw around 4w together. 2 days later I got back and the smart shunt was giving out low voltage alarms, the voltage was showing 12.4...
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    Battery voltage between 13.6 - 14.4 concidered fully charged?

    Hello everyone, I'm curious about these voltages 13.6-14.4. My charges is set to 14.4 to charge bulk/absorb and 13.6 float. I have hooked up 3 batteries in parallel, before connecting them I charged all of them to 14.4, and left them to rest 1-2 days. These were their voltages before...
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    LifePo4 batteries in parrallel voltage difference.

    Hello everyone! I'm trying to connect 3 100ah Renogy batteries in parallel. Until now I was using only 1 100ah battery. I know it's very important for the voltage difference to not be more than let's say 0.2v between each battery bank and the banks to be fully charged when connecting. My...
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    Bulk, Absorption, Float

    Hello everyone, A little confused on the charging cycles on lithium iron phosphate, I think I understand them, but need you to confirm. Bulk and Absorption, are basically the same from my knowledge, some use Bulk, some use Absorption, this is the cycle the charger puts out specified voltage...
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    Victron Smart Shunt second battery monitor

    Hello guys, I have a question about the second battery monitoring function. I'm curious, when I hook up the negative from the starter battery, to the shunts minus, in order for the shunt to measure it's current, will that in any way connect the car's 12v system to the van's electrical 12v...
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    Configure MPPT with Renogy 100ah

    Hello guys, Going to start configuring my MPPT soon, and I have a few question. I just read a bunch on about the Renogy how they don't have a float and eq voltages. They recommend for absorption 14.4, and for float and eq, either 14.4 (the same as absorb) or set to 0. I'm going to go with...
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    Inverter Multiplus 2 3000va battery bank too small

    Hello everyone! Have some question for you. I'm building my solar system. The inverter I have purchased is a Multiplus 2 3000va 230V version. The battery bank at the moment I have a 100ah battery (planning to upgrade in the future) but for now I only have one. I see in the manual they...
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    MPPT 100/50 charge controller on the edge?

    Hello everyone, I have bought myself a MPPT 100/50, and also bought 2 Sunpower solar panels. Here are their specs: 320W Voc - 43.6 Imp - 9.04 STC - 25 Celcius Voltage Temp. Coef. −0.28% / °C Power Temp. Coef. −0.34% / °C I thought that I had it all figured out, until I used this calculator -...
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    LiFePO4 charging current

    Hello everyone, I just wanted to ask if I'm on the right track. The battery I'm planning to buy is a 100ah lithium iron phosphate battery. It has a Charge rate at 50A, so I thinks this means it's .5C. My question is, if I buy two batteries, and hook them up in parallel connection, they will...
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    Bettery / Inverter / DC charger wire

    Hello all! I wanted to ask about what kind of wire to use. If I lived in USA, it would have been easy, tones of websites and videos explaining what kind / type etc.. The problem is I live in Bulgaria, Europe. And here the naming convention is a bit different. On top of that there is not much...
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