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I have three lithium batteries in parallel with a Magnum Energy ME-BMK shunt on the negative cable for my ME-ARC controller. Would like to have a Victron Smart Shunt for its Bluetooth feature. Is it OK to put two shunts in series or can you only have one?

I presently have 2 SOK 12v 206ah lithium batteries wired in parallel. They are a little over 2 1/2 years old. I’d like to add another one next spring. However, it seems I remember reading in the past that lead acid batteries of different ages should not be mixed. Don’t know if having them in...

I followed the advice of a van systems solar internet guru and installed a 250a MRBF fuse in a fuse holder directly to me positive terminal on a SOK 12v lithium battery bank. He said in light of the scarcity and prices of Class T fuses that would be acceptable. Since then another forum thread...

OK 12v lithium batteries in parallel. Max charge current 70a, recommended 40a. Max continuous discharge current 100a each, peak 200a(3sec). I believe I will put a MBRF or ANL fuse on the positive terminal or close to it of each battery. What size should it be? I’ve read 120% of either max or...

OK 12v lithium batteries in parallel. Max charge current 70a, recommended 40a. Max continuous discharge current 100a each, peak 200a(3sec). I believe I will put a MBRF or ANL fuse on the positive terminal or close to it of each battery. What size should it be? I’ve read 120% of either max or...

I replaced my 4 6v AGM batteries with two SOK LiFePO4 12v 206ah batteries with no other chamge to the system. There is 4/0 cable from the inverter/charger to the batteries through a cutoff switch with no fuse in the line. There is a 2/0 cable from the cutoff switch to the house items, as best I...

In my motorhome I have 2 SK12V206 lithium batteries charged by a Magnum MS2012 inverter with the ME-ARC remote display and a ME-BMK battery management kit. I am thinking of installing a Victron BMV-712 Smart battery monitor with Bluetooth. I understand it might be more accurate especially in...

When using a wire size calculator which solar panel volt and amp measures should I use? Vmp or Voc? Imp or Isc? And what percent voltage drop should I shoot for? Is it worth it to use 4 AWG to get 1% drop if 6 AWG is 1.5%?

Is there a website that I can enter a date and my latitude then get expected solar panel performance? I’m thinking it would give a performance factor type report. Example: on September 9 at N36 latitude the performance factor might be 2.6 (or some other number) so a 100 watt panel could produce...

I watched a webinar about solar systems on RVs. It was mentioned you can be less careful about running your batteries low if you have a generator. I wonder about this. My generator uses the house batteries for starting so you have to not let them get too low. I assume this is especially true for...

Got LiFePO4 batteries to install and a new inverter charger on its way for my motorhome. Now I hear lithium batteries don’t “like” to be charged to 100%, more like 90%, and certainly shouldn’t be stored above 90% but rather 50%. Is this true? And, if so, can I program a Magnum MS 2012...

After originally planning installing four 210w panels from Continuous Resources fir $194 ea. I’m thinking instead of going with two and possibly later a third 370w solar panel in my motorhome. I’ve found two products to choose from with wildly different prices. A Seraphim 72 cell mono from...

I’m getting closer to installing my LiFePO batteries. I just read something I hadn’t thought of before. Actually, in a way the subject did come up. Previously, the issue arose that lithium house batteries may not be very useful to help the chassis batteries if they are too low to start the...

I’m installing 4 12v lithium batteries in parallel. Simple enough to to set them side by side in a row with equal lengths of cable between them. Then attach the main positive cable off one end of the set and the negative off the other end. Now, with some rearranging I can add a 5th battery if I...

I’m installing 840w of monochrystilline panels but may increase this to 1260w in the future. 4 12v 105ah lithium batteries in parallel. I’ve looked all over the internet for sizing an MPPT controller and got calculations all the way from 68a to 132a. Quite a range. So hopefully turning to this...

I am replacing my AGM batteries in my motorhome with lithium soon. I have read there is some concern about charging the lithiums from the alternator since they can draw so much current it is harmful to the alternator. Will Prowse seems to be of the mind that they shouldn't be charged from the...

Just watched Will Prowse’ comparison of 12 vs. 24v systems. He had me convinced to go 24v except for a couple of things. He is opposed to charging from the engine alternator. He said there were other options but didn’t say what they are. I think using the alternator guarantees fully charged...