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I do enjoy watching his videos. Basically cost is not an issue for this guy (his business is doing custom RV conversions). That Lithionics battery he is talking about costs $4500! https://www.nationsstarteralternator.com/Lithionics-12-Volt-315AH-E2107-GTX-Battery-p/gtx12v315a-e2107-cs200.htm

OK, it has been hours since I stirred the pot. I was looking at another thread and once again was wishing that the BMV-712 had an extra relay output. Got me to thinking. The BMV-712 communicates using Victron.Direct and the communication protocol for Victron.Direct is pretty simple...

I have been reading discussions about top balancing cells and I realized I need to be a bit more organized about this. So as part of that I think I will design a constant current, electronic load. I am thinking about using one of the L2 family of Linear N channel MOSFETs from IXYS (Littlefuse)...

I find the coolest stuff at MPJA and this is no exception. I do wish it was rated for 200A. https://www.mpja.com/Battery-Cutoff-Switch-100A-12_24VDC/productinfo/34780+SW/

I have been tending to oversize my wiring in order to keep wire temperature down. I was just looking at this page on Paul Kennedy's website and got my assumptions challenged. https://shop.pkys.com/Ampacity-Tables_b_43.html 105 degree, ABYC rated wire can certainly handle a lot of amps. That is...

Victron Energy has a short video on why their SCC don't start charging until the panel voltage is 5V > battery voltage. The presenter also explains why series wired panels are better than parallel wired panels from an energy harvesting standpoint. In a different video he mentioned that the...

I have built some of his audio circuitry and he seems to know what he is talking about. This is aimed more at Lion (3.7V cells), but perhaps there is stuff of general interest here. https://sound-au.com/articles/lithium-charging.htm

TI has published a white paper on high voltage solar inverters as applied to grid-tie applications that I thought might be of interest. It goes into the differences between micro-inverters and string inverters which I found interesting. I thought there was a forum for posting things like this...

I have read from several experienced users that it is wise to derate FET based BMS current ratings by 50%. I was wondering if anyone has any experience with adding cooling to a BMS that they would be willing to share? Does enhanced cooling capability increase the usable current rating of a FET...

I just found out about these high current remote control Battery switches from Blue Seas. Thanks Zil. https://diysolarforum.com/threads/battery-bank-disconnect-switch-for-large-off-grid-system.9570/#post-163063 https://www.bluesea.com/products/category/13/60/ML-Remote_Battery_Switches These...

I found a company that makes custom ground straps in the USA that looks to be perfect to use as busbars for the 280 AH cells. The cells came with solid busbars, but to be honest they look a bit wimpy and I would much rather have braided straps to ensure there are no shear stresses on the...

I am going to be mounting a single 300W, 24V panel on top of my E350 cargo van RV conversion. I have a set of 3 ladder rails mounted on the roof and have a luggage basket over the rear pair of rails. This leaves the section between the front and middle rail to mount the solar panel to. Here are...

I have been looking for a tiny inverter based microwave for my Van RV build and Panasonic has this 0.8 CuFt, 950W beauty. Rotating glass turntable for even heating and only requires 1200W to operate. https://shop.panasonic.com/support-only/NN-SD372S.html $140 from Staples...

I have been thinking about chassis grounding my van based RV system. You can see the electrical drawings here. https://diysolarforum.com/threads/24v-van-system-drawing-get-your-overripe-tomatoes-ready.11669/#post-129130 I plan on having alternator, solar and shore power. The inverter (Victron...

After months of pontificating, I have finally pulled together the electrical design for my RV conversion. Let me know what you think. This is my first version and I would much rather fix as many problems at the pixels on a screen stage as I can.

If you have any desire to build an 18650 based battery ala Tesla or Battleborn then this stuff should be right up your alley. https://batteryhookup.com/collections/cell-level-nickel-fuse/products/nickel-fuse-2p-wide-continuous-roll-by-the-foot-18650-cell-level-fusing Get yourself a cell...

You could use this for shore power charging or on the bench. Looks like a "smoking" deal. Hope its not smoking, that would be bad. https://www.goldmine-elec-products.com/prodinfo.asp?number=G25029

I bought a 7S, 150A, Daly BMS for the LiNMC battery pack I am building. Question is should I mount the BMS directly to the cells to ensure the thermal sensor in the BMS is sensing the cell temperature directly? There isn't a separate temperature probe with the Daly BMS nor does it appear as...

I have bought many items from MPJA and been very happy. They are in Florida so shipping time is reasonable. $7 flat rate shipping, so look at what else you need to make it worthwhile. https://www.mpja.com/mobile/Battery-Low-Voltage-Disconnect-Board-20A/productinfo/36621+MI/

As title states. Thinking about what I should do for GFCI in my camper VAN power system. I have a Victron Multiplus 24/2000-50 inverter so a 20A rated device should be adequate. I am splitting the Victron's output into 3 separate circuits (each with their own 15A breaker) so I don't want to use...

I have been looking for discharge curves for the LG LiNMC batteries I am assembling into a battery pack and found this document (link and document attached). https://www.batterypoweronline.com/wp-content/uploads/2012/07/Lead-acid-white-paper.pdf I am still digesting the information in it, but...

I have a van conversion project in process and live in Phoenix AZ. I am concerned about battery longevity during the hot summer months and would like to only install the the primary house battery when using the van for boon-docking. I would like to be able to use the ventilation fan and LED...

Everybody has the Chinese hydraulic crimp tools with changable dies for around $60. Color me skeptical, but I wonder how well these actually work. I was reseaching crimpers and found this Temco crimp tool. No dies, you dial in the desired amount of crimp to suit your particular crimp lug and...

Just ordered one of these for my van system. https://www.mpja.com/mobile/Racing-Start-Accessory-Panel/productinfo/34936+MI/ Going to use the momentary start button and the relay to create a push for 24v to 12v converter circuit. The extra switches will be used to control individual low power...

I am building a solar power bank using 7 of these LG Lithium Ion Batteries (7S2P) for about 3000 WH capacity at 25.2V. https://batteryhookup.com/products/new-lg-chem-n2-1-3-7v-120ah-cell-module I have this Daly 24V, 200A BMS on order...

I just bought 7 of these LG 120AH battery modules to make a 25.9V battery for my van. https://batteryhookup.com/collections/green-friday-weekend-deals/products/new-lg-chem-n2-1-3-7v-120ah-cell-module Question is what is the best BMS to use with these batteries. My thinking is to get either a...

I am considering building a battery bank for my Van conversion, but have yet to find a FET based BMS that can handle 200A. Does such a thing exist? I am trying to avoid using a magnetic contactor to avoid the heat issues and power loss. What do people who are building larger battery banks...

New member. My background: I am 60+, male and an electrical engineer by profession. my hobbies include: dual sport motorcycle riding, camping, shooting and astronomy. I am primarily interested in solar for RV applications. I just bought an Ford E-350 van that I am going to be converting into a...