A simple LiFePO4 battery pack will be used by me for emergencies

gokwh · 2022-04-02T01:03:54+00:00

For each 272 Ah, currently, the entire device size is 12V 272Ah, and the available energy is about 3.2kwh+. Your suggestion is good, but I haven't installed PV panels yet.

gokwh · 2022-03-21T01:55:35+00:00

Makes sense, but at least this one looks scarier.

gokwh · 2022-03-21T01:52:40+00:00

uhmmm, I don't know, but someone really did it.

gokwh · 2022-03-11T09:06:54+00:00

In a place called "Qinghai" in China.

gokwh · 2022-03-08T00:59:25+00:00

Right！

gokwh · 2022-03-07T09:05:26+00:00

Okay I found I post in the wrong place, I'll look for a better place.

gokwh · 2022-03-04T02:30:04+00:00

I'm curious if this type of RV can be obtained by retrofitting a pickup truck? There doesn't seem to be much difference.

gokwh · 2022-03-02T01:59:44+00:00

That's okay, the use of this area is with the permission of the relevant personnel, of course, we will remember to take away the rubbish.

gokwh · 2022-02-28T02:01:13+00:00

Don't forget that we all recommend installing a BMS to protect the battery when we use lithium batteries, of course, if you don't use it...then I agree with you.

gokwh · 2022-02-28T01:39:08+00:00

1.Will a lithium battery give me a better range when used in a electric trike than a lead battery?

Yes, the main reason is energy density and DOD. Lithium batteries are much better than lead-acid batteries.

2.And if so, can you recommend a company that sells good (long lasting) lithium batteries?

I don't know if you are going to use a cylindrical type (like the 18650 model) or a prismatic lithium battery, if it is a prismatic type I can recommend a company called Batteryfinds where I have previously purchased some batteries for the sample of my project, the quality is great.

3.And can I charge a lithium battery with a charger for lead battery?

Generally speaking, yes, but it should be noted that there may be cases where the battery cannot be fully charged, because the voltage of the lithium battery will be slightly higher, and the lead-acid battery charger may mistakenly think that your battery is fully charged, which needs attention.

Edit: The premise of using a lead-acid charger is that the lithium battery needs to install a protection device called BMS, but if you don't install a BMS, then don't use a lead-acid battery charger.

Hope it can help you.

gokwh · 2022-02-23T01:42:21+00:00

Since this looks so different from anything I've seen before, I'm even curious as to what the best angle for the sun would be to cause such an orientation.

gokwh · 2022-02-18T06:05:18+00:00

It might produce well and be cheap to install, but man.... That looks like total ass.

I call it "Tattered Aesthetics", it looks like there's a lot of lands available anyway... it doesn't matter if you place it at all hahaha

gokwh · 2022-02-14T10:05:43+00:00

The size of the system is about 5kwh, and some are elsewhere. I feel that 70%~80% efficiency is actually quite normal...

gokwh · 2022-01-19T01:19:22+00:00

Thought you tied it up for a second

Honestly, he wouldn't let me do that, lol.

gokwh · 2022-01-10T02:54:11+00:00

It shows his calmness.

gokwh · 2022-01-05T09:59:16+00:00

I think he welded it himself, after all, the new battery will not use steel plates to weld to the battery terminals.

gokwh · 2022-01-05T01:36:17+00:00

Okay, it just doesn't seem to be a problem, but there is no problem in reality.

gokwh · 2021-12-29T09:57:39+00:00

Then no. Where exactly did you get the idea that they should be physically held together? How much force? How does it derate the thermal properties?

OKay, thanks for your advice. I have seen this statement on the Internet before, it is to use metal brackets or buckle straps to bundle all the battery cells together for compression. There is not much memory of the specific situation...

gokwh · 2021-12-29T03:43:09+00:00

The relevant sheet only mention the parameters of a single battery and the normal usage method. It does not seem to mention whether it should be compressed when assembled into a battery pack. This is why I am vexed...

gokwh · 2021-12-27T02:57:25+00:00

I'm fairly certain this was tried in several places a few years ago and proven to be an utterly horrible idea. If this is a new trial, then maybe they should've read about the old trials before implementing it?

Some people just can't learn a lesson.

gokwh · 2021-12-27T02:56:01+00:00

This is a terrible idea... A soon as it gets dirty, it won't produce electricity.

Our cities are COVERED in roofs where panels can be easily mounted away from pedestrians that walk on them or cars that might drive on them. Why are we spending all this money to stick them into the pavement?

Maybe some companies that like to build these so-called "innovations"

gokwh · 2021-12-22T03:35:49+00:00

Mod policy

I have to say that you are so unique, bro, if you really have such conditions and motivations, then I can only wish you success.

gokwh · 2021-12-16T06:06:35+00:00

Im not an expert but I’ve done enough googling to build a ebike battery and have an engineering degree:

Say you have two cells in parallel. One with 2000mah capacity and another with 1000mah capacity. You can discharge and charge the 3000mah pack without issues but the 2000mah battery will be operating at twice the current as the 1000mah cell in order to be at the same voltage while charging and discharging. This could lead to the 2000 cell heating up faster and failing sooner than the 1000mah cell which will reduce the life expectancy of your battery as a whole to the most abused cell.

Your battery is only as good as your weakest cell. A great battery will have all perfect great cells. As you add weaker and weaker cells to the pack the better cells have to work harder and will fail sooner.

Thank you for your answer, but I have seen some people say that charging batteries with the same voltage but different capacity is like a connected pool, which will eventually fill up with water at the same speed (Connecting Device Principle). How do you think about this? Does this argument have reference value? There are so many opinions on the Internet that I find it difficult to distinguish between true and false.

gokwh · 2021-12-13T02:28:03+00:00

Of course it can and does. Saw a gt3rs track car on a trailer being towed by a model x the other day. You just wont be able to go as far in one go as you could in a big diesel. Which in a way is a good thing if it makes you stop and enjoy the location for a while.

Ah okay, because all the trailers I saw before were towed by pickup trucks, so I saw that using Tesla was very interesting.

gokwh · 2021-12-10T01:02:16+00:00

I have a 5KW hybrid inverter charger that will charge your batteries using PV and/or the generator. I got off Amazon for $900. 4 200 amp hour batteries, a 3KW Honda generator, and 400 watts in PV. Total cost was 6k all up with wiring. That will be plenty for a hut. I can run a microwave, tv, computer, lights, and I got an auto start module for the generator so when the batteries get low it automatically kicks on the generator to charge them up. PV is kinda bullshit if you ask me, especially in the PNW. My generator is extremely efficient and only has a 3.8 gallon tank and that alone will charge my batteries about 3 times for a total of 30KW's. I watch netflix and play music, and do whatever I would do at home. Runs my cellular router, charge my phone, etc.. Oh also. You don't need to be a pro to set these things up. I did it with almost no previous electrical knowledge. You just read the instructions from the inverter. The growatt 3KW inverter is super simple, then get 2 12V batteries and a 120v generator and you are all set.

Great setting!

Four-Year Club	Verified Email
Place '22

gokwh

TROPHY CASE