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I meant to be adding to this thread but have been busy with other things. Anyway, I ordered 16x 280's from Jenny out of China on May 26th and received them July 6th and 7th. They all look really nice (no bulging, dings, or dents) and are the same voltage (3.33). I wish I had asked to buy some...

I thought lithium ion batteries were limited by watts or watt/hours per box to comply with shipping regulations or something like that. That might have been just for lithium polymer though and could have changed by now.

Looks like the Docan site is down, or gone rather? All I am getting is 502 error. I swear I just looked at batteries there a couple days ago. Anyone else having this error? https://www.docanpower.com/

https://www.amazon.com/Coleman-Stainless-Steel-Percolator-Cup/dp/B0009PUQSM

Regarding a case for your build, if you were to get the 100ah cells linked in post #10 by Jim, 16 would fit in this milk crate. The crate measures 12x18 internally while the pack would measure 11.4x15.4. You would have to sawzall the top off as it is a bit high at 11" and said you have 9". The...

Another way to go about it is to look on alibaba for what you want and then contact supplier and request a quote for door to door pricing (DDP) to your location. The prices are regularly better than aliexpress. By the way, what are the dimensions of the battery compartment?

Great point. I had forgotten that some of the pre-builts do not handle being wired in series. I'm also in complete agreement with the rest of what you said. Edit to add: 16x280's in the above configuration would measure 23"x14"x9 high if you are wondering if it would fit in the amount of space...

That 280 peak is only for 5 seconds so if you pull over 100 amps going up a hill, you might not make it all the way to the top. That said, I believe you took some readings and came to the conclusion you wouldn't be pulling over 100 anyway even up hill. Worst case scenario is you do not mow on...

First you are going to want to know the size of the cells you choose, then determine how many you will group together, then find/make a box that size. For instance, here is an image of 16x 135ah cells in an 8x2 configuration. This layout measures 13.5" wide and 15.125" long, and 7.25 high (plus...

You are saying a lp furnace that "uses the least power". I'm assuming you mean electric power? Have you looked for one that operates with a thermocouple? After the pilot is lit, the heat creates the electric power needed to turn the gas on and off and is self regulating using a thermostat on the...

That's true and I am in the same line waiting. He did however mention purchasing quite a few 150ah's that were ready for immediate shipping if I remember correctly. That's probably the direction I would look first before buying through Ali. Like I said before, if the output works, 16 could fit...

Good day. It appears those batteries you linked to will be able to replace the agm's in your mower. I would expect you can also use your charger without issue. Thoughts; You do not have to match the amp hours, only the voltage. The size difference between the agm's and lifepo4 might make it so...

I bought them from Amazon in 2019. The one you are seeing is the current production and I doubt you'll be able to find the same 10 pound ones. I'm wondering if they have strengthened them or added a better coating or something that added weight. I wouldn't hesitate to buy them.

Yes, that is the same as the label on my panels. I have not actually weighed a panel but they are light and I believe the 10 pound claim. If they are saying the current batch is 12 lbs, I would believe that too. As often as the specs change, it seems like they just build these with whatever bulk...

For size, I was referring to footprint, but I do that with the assumption that the rated output would align with the size. So far, the smallest I have found is this one. I would like something more along the lines of this size. I just don't know if something like this exists for LTO cells or if...

Does anyone know of a small cheap 5s bms for lto cells? I have a project in which I will be using 18650 sized lto cells for a 12v application and want something to prevent over charge/discharge. Everything I'm seeing for lto is disproportionately sized for what I want. Ideally there would be...

I had a similar problem running ac and microwave on my RV/Camper. It was due to the built in bms shutting the batteries off at 30 seconds of overdraw (according to the bms setting). Everything would run fine and then shut off. I thought it was the inverter because it would fault out (beep) from...

To follow up on this. I set mine to my battery size (tested) and from 100% (set when full) to 0%, it was dead on. I got about .01% more power before the low voltage disconnect. My concern about having the larger size shunt was unwarranted.

Per day by the numbers. 2x fans- 200x24hours=4800 watts 2x bulbs- 200x18hours=3600 watts 8x bulbs- 800x.5hours=400 watts 24 hours of consumption= 8800 watts (which I would call 10,000 watts minimum with system losses) You need to generate that in 2.5 hours of sun so 10,000/2.5= 4000 watts of...

I have one of those same panels. It's a good panel. I use it for my battery box (solar generator). They are a little heavy at 16.5 lbs which is why I want the compact panels at 10 lbs. Hoping this works out for you Bri2k and you get your compact panels. If you do, please let me know who your...

The label on the back should also state the dimensions. See example:

There are other metrics besides efficiency for choosing the right battery for an application. For instance, my upcoming project is to build a dedicated battery for our off grid cabin. We are currently running LFP and will need to remove the battery around new years before the real cold sets in...

Farm and fleet carries a decent assortment of fla/sla/agm batteries. They are house branded but if you know the specs you want. it could be an option.

Yeah I will. From reading your post I thought you had the opposite issue I did and it gave me hope they had the correct panels and simply sent me the wrong ones. In reality, they are just sending what they got.

So if I understand you correctly, you wanted the 26x36 panels and received the 20x40's? I ordered 4 of the 20x40 (39.64x19.61x1.18) compacts from HQST on Amazon (to match the other 4 I already have) and they sent me the 26x36 version which I cannot use due to size constraints. I did a return and...

Yes sorry, I was looking at the picture only and not your schematic. As was pointed out, removing the battery connection should shut off the MPPT.

In the included picture, the load out of the charge controller (two screws furthest right) is not connected to anything. I'm not sure if I follow your question. If you are asking if power coming in is redirected to the load out (assuming there was one) then yes it powers that and the excess goes...

I have a background in manufacturing engineering and I am very familiar with the term and trying to make things idiot proof.

You received a confirmation text and replied to it with your cancelations? I would assume that was an automated text and responding goes to no one. I've done business with them before and it went fine though I don't recall how long processing and shipping was. Here's hoping you get the...

You can also add something like these thread spacers. This was my plan until I figured out how to make it fit together without needing to wait for these. https://www.ebay.com/itm/5pcs-M6-Thread-Spacers-Male-x-Female-Hexagonal-Brass-PCB-Standoffs-Spacers/182635686824 Edit to add these are brass...

I have those same cells, and yeah they could have made the studs 1/4" longer. I believe they are laser welded from talking with a vendor in China about getting more.

Any product with that many testimonails and no specs listed is garbage and a scam. It has to be, or else it wouldn't be set up like that.

The first answer in the question answer section of the link I posted has a good description of this. I will not copy paste as it's not mine. I'm sure others will chime in with answers to your series of questions. https://www.amazon.com/Renogy-Charge-Controller-Compatible-batteries/dp/B07G1PL1B9

Congratulations! Best of luck on your en devour.

Thanks for making the effort. As long as it works I don't care what it says so I'm happy yours is working well. I did install it but haven't cycled it down to get the percentage lined up.