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On my van I use a 2 amp dc to dc converter to charge from the house battery to the start battery. My agm start battery requires 14.7 volts to fully charge and the alternator only goes up to 14.4 volts, so I have to top off the battery every other day. If I don't top off the battery after about a...

How long are the jacks running when in use? How large (amp hours) are your batteries? On there website someone ask a question about the amp use on there latest 4800 series jacks. It didn't specify if the amps are for 1 jack or all 4 jacks. But if its 20 amps x4 that would be 80 amps. But if it...

Get the larger batteries you can get. I have a 220ah lifepo4 and a 312ah li-ion battery banks. I use the 312ah just for my 26 liter 12 volt fridge. One thing I notice is that your group 34 is fully charged the following day within a couple of hours from sunrise. I suspect the mppt controller...

All mppt controllers always read higher than the actual battery voltage. The mppt controller thinks the battery is fully charge and goes to float early. I encounter this with different controllers pwm or mppt. The battery terminals can be at 14 volts but the mppt is actually reading 14.4 volts...

something else to look at is if the circuit breaker is not a true 300a circuit breaker. I had some 30a breakers that kept breaking at 22 amps. I had to replace with better quality breakers that could handle the actual amps. I had to use a dc wattmeter to see where the breakers were breaking.

I would connect them in parallel, that way they both charge and discharge at the same time. My 220ah lifepo4 battery bank is 2x110ah batteries hooked up in parallel, been running them that way for over 3 years. The lifepo4 have bms so if one discharges before the other one it will shut down but...

Here is a picture of how I have my tk15 sensor wired, I use xt60 connectors on it. And used 12 gauge on it since I rarely go over 20 amps, this goes on my 220ah lifepo4. I used yellow/pink wire on the positive and brown on the negative. As far as night time cooling consider a swamp cooler, I...

according to the specs the DC input would have to be at least between 32 and 95 volts. If you have a dc to dc charger it would have to be be at least 32 volts. I suspect the wiring inside the unit requires the higher voltage due to thin gauge wiring. If your 20 amp charger is less than 32...

I placed the boost buck converter between the battery (my 312ah li-ion battery pack) and the fridge. From the converter to the fridge is less then 10 feet. The converter being in between the battery and fridge makes sure the fridge only gets 13.4 volts, no matter if the battery is being charged...

If the rewiring doesnt help with your voltage drop problems, one thing that might help is a boost-buck converter. 2 years ago I had a similar problem with my 26L 12 volt fridge, on very hot days the compresser would start cycling back and forth. I had a 220ah lifepo4 and it wasn't able to keep...

The fuse would only blow if something was shorted, I would check to see if there is a wiring problem. Any DC charger / charge controller will have no problem charging 2 batteries in parallel. Once both 100ah 13 volt batteries are connected in parallel, they behave as one giant 200ah 13 volt...

It should work, I have 2 battery banks in my van a 220ah lifep04 and a 312ah li-ion battery. I use a 5 pin 12 volt automotive relay to switch from the main (NC) lifepo4 to the aux (NO) li-ion. The switch between battery banks happens quick enough that it doesnt affect the charger as it changes...

3s Li-ion is fully charged at12.6 volts and 4s lifepo4 is fully charged at14.6 volts. For your lifepo4 just set it to lead acid 14.4 volts, thats good for lifepo4. All the batteries lead acid, li-ion, gel, agm, lifepo4 are charged by the CC/CV method which the charger does, the profiles only...

Just make sure and measure all the voltages directly from the battery terminals. For lifepo4 you want to get them up to 14.4 volts (max for a 4s lifepo4 is 14.6 volts). The atempower charges the lifepo4 to 14.4 volts which is adequate for the type of battery, but just verify the battery...

There is a video on youtube "Lithium battery test versus Gel." where they test a 100ah lifepo4 versus a 100ah and 220ah lead acid on a 2600 watt heater load. The lifepo4 easily beat both batteries, the lifepo4 didnt sag too much (11.7 volts) during the test, both lead acids (100ah 10.3...

I would keep fighting it, no lifepo4 will remain at 10.6 volts while charging. Either the bms is bad or some cells inside the battery are weak. If the battery is overcharged or overdischarged the bms will activate and keep the battery from operating and will read a low voltage like your battery...

190x4 = 790 watts, 790/14.4 volts = 52 amps. 52 amps is the most you will extract when the sun is overhead. To get the best efficiency from your mppt, you need to connect in series, mppt requires high voltage to extract the most amps for you. But you need to see what the max panel voltage is...

unless the battery is very low or your charging 12.6 li-ion batteries, the most you will see is about 14 amps. On my 365 watt panel with mppt the most amps I see when charging my 14.6 volt 220ah lifepo4 is 12 amps but I usually keep the battery at over 80 percent. When charging my 12.6 volt...

I suspect your draining the batteries too low and they aren't getting back up to full. 10 volts is too low for agm's. Once the batteries start going below 11 volts they start losing capacity, they will still charge back up to 14.4 volts but once you start putting loads on them they don't last...

I was reading up on the victrons and some of the controllers shutdown power production when the controller temp reaches 40c (104f) , the temperature when the engine is running is about 150f under the hood, also sitting in the sun the temperature can reach those temps also. If you put the...