Most reacted posts

How do you intend to connect the 48V batteries to the Delta Pro for charging? The solar charge port can accept up to 150v max with a charge rate of 15A. If you connect 48 V batteries in a series to achieve 96v output, you also need a method of regulating the amps---you don't want to dump 96V at...

Really? That simple? I could just connect these two in parallel, and nothing melts down? (the larger raw cells have a BMS, this is just to illustrate)

If you have a series of solar panels supplying 100V it will also do so at a specified maximum amperage, say 12A. This is a regulated and known flow of power and within the limits of the Delta Pro for DC power input through the solar charge port. A 48V or 96V battery can output that voltage at...

Most of this is beyond my level of experience, though I have been considering something similar for an off-grid cabin, and did a 12v system for a small travel trailer, but I still watch Will's videos on the subject. So I will confine my thoughts to two items... 1) wire gauge for the solar...

Oh that is an easier answer. You will be fine with SAE for that. I have a 600w Giandel pure sine wave inverter I plug into my small DIY 50Ah LiFePo4 solar generator using an SAE connection. I never work it to the full 600w (technically that could be 50amps), but it easily powers laptops, fans...

Any more updates or finished pics/info for this crate project?

What LFP cells are in the Ecoflow Delta 2, and can I source them for DIY projects? The Delta 2 hits the sweet spot for size/weight/power output (1800W). Smallish and portable. But I would like more capacity than the 1024Wh (though not bad). You cannot duplicate this unit DIY using Eve or the...

Yes, not certain on the actual battery size. Do you have 16- 280Ah cells configured as one 48v (nominal) battery? This would be 51.2v x 280Ah = 14,336Wh. Close to what camelCase suggested, and would agree with his conclusion. Otherwise, 57.3kWh and 1120Ah... what shavemcspud said.

Okay. Almost. For calculation it is 51.2v (12.8 x 4), but yes, 1120Ah. 57.3kWh.

Building a milk crate/work box solar generator with 280Ah cells. What can I use to cover the top of the completed cells to protect the terminals and bus bars from contact? When Will Prowse rips apart batteries for review, there is usually some sort of resin insulator sheet. What am I searching...

Yes, that is what I mean. I have Ampere Time and Li Time batteries---they are encased. I also have a build for my garage using those same Eve cells, and no, I would not place the heat pad and metal sheet in direct contact with them. I would also suggest incorporating a version of what @JRH is...

It looks like your multimeter readings are close to correct for the 600w load, but you are comparing DC to AC, and there is loss in the conversion from DC to AC depending on the efficiency of your inverter.

So the Ah is an indication of what the BMS can output. A 50Ah battery can likely discharge at 50A. A window A/C unit with a rating of 5,000BTU can run on a 600w inverter. I tried it based on a Will Prowse video. But your needs will be much less with a 300watt inverter, especially if you think...

Thank you for the reply. Sorry, I don't mean to be dense, but you were "concerned about accidentally touch the aluminum top" of what exactly? I have M6 post screws that came with my Eve cells, and they fit, but are longer than needed and protrude above the nut more than necessary, and this would...

I cannot speak to most of this, but depending on how many lights you have, and total power draw and length of time you would like them to stay on, you probably need more or larger solar panels, and yes, a centralized LiFePO4 also sized for capacity. Possibly 12awg or 10awg wire depending on...

When unattended in winter, how much power is needed to run these items? Even with a good pure sine wave inverter, there is a loss of efficiency in conversion, and in idle consumption. I am guessing it doesn't consume anything near 600 watts when unattended. Would there be a way to eliminate the...

So far the best socket type USB-C charging port in PD I have found supports 65W. You have to be careful in comparing these accessory sockets, even if they have PD. If they have multiple ports, look at the total wattage that is supported. There are a lot of combos that support USB-C in PD and...

Would something like this work? This is where I get lost in the weeds...

Yes, you have two related problems with this setup. Your BMS is underrated, as mentioned, AND you do not have enough battery capacity. Victron recommends a minimum of 400Ah of battery for use with the 12/3000 Multiplus (I have a Multiplus connected to 500Ah of LiFePo4 batteries). In my setup, I...

Did the panels arrive? Are they in operation now? Recommend?

A 1000w PSW inverter is about as much as you can ask of that battery/BMS combo. There is loss in the conversion process to consider as well, figure about 15%, meaning your battery would actually have to supply 115A for a 1200w inverter to work at max output. I would actually recommend a second...

Nothing wrong with that, having multiple points of protection. It certainly doesn't hurt anything. Cheers

Interesting, yes I guess I didn't think about it that way. So why would what deserthi wants to do damage the BMS if he is within the SCC parameters? He would be under max voltage.

I enjoy following your build process and progress, so thank you for sharing. After building a smaller version for my RV, I too do not understand your rationale for the placement of the MCB, or intended function? The T-class fuse ahead of your battery disconnect is your main protection and...

Thank you @Reigate and @hankcurt. The clearance issue now makes sense, and you are right, it is elevated above the surrounding BMS backing plate ever so slightly, but I too will cover the area with electrical and kapton tape. I was able to find M6 x 12mm hex head flanged bolts, flat and lock...

Not sure exactly the model/type of RV or camper you have, or the design of components, but the diagrams from Explorist.life are very helpful. Look at the image and link below. Will Prowse is an excellent resource, and Explorist also does a great job with clear plans and great bite-sized videos...

I bought this one as well, but how are people mounting this unit? The other cheap little units come with the case assembled from little jigsaw puzzle pieces of acrylic, but this one is naked.

I have 10 awg SAE connectors for the portable ground solar panels outside of my RV. From the solar panels over 10 awg solar wire thru the SAE 10awg wire in to the solar DC breaker. From there on to the solar charge controller. All 10 awg. No problems. I have seen some SAE available on Amazon...

Your method basically matches my theory of "practical" capacity vs. absolute capacity, and why I am only concerned with a rough capacity test to know the battery is in good shape and not faulty or lower grade cells. The inverter is going to cutout from low voltage before the battery reaches its...

The "Inkbird" is an AC powered unit. The little ones just mentioned are DC powered. Depends on your application situation.