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I would get the SOK. In a few years, battery technology will change so much you will want a different system again. Save yourself the money for now.

Yes, you would have to configure your charge controller for 48V and have enough power from your array. It's pretty simple. This will also give you the ability to increase your array size from (24V) max 1500 watts to (48V) 3000 watts max. FM 60/80

A general rule of thumb is the size of your inverter should be around the same size of your array. You need an efficient AC unit. Look at a mini split system. This place has great deals and maybe better than buying on Amazon even if you have to pay shipping... HERE. I would go with 48V if I...

Most people also say TESLA wrong, listen to Elon, he says TEZLA in his interviews.

From the Valence website "Our battery modules are energy storage devices that can be configured in a variety of ways to meet the particular requirements of an application. To do so requires a properly configured Valence Battery Management System (BMS) for the system parameters and contactors...

I spoke with Tesla and asked them about using it off grid only and they said NO, the inverter must sense a grid connection for the Powerwall to work.

Are these still available?

Wondering if anyone has tried these batteries. Price is right especially since it has a built in BMS. https://pacificsunsystems.com/catalog/product/12v-100ah-lithium-battery-lifep04/

Bought this unit last year and never used it. Brand new and warranty for 5 years. I'll let it go for $85 + shipping

Purchased this unit and never used it. Brand new and comes with a 5 year warranty. $85 + shipping.

Doesn't sound like you need a transfer switch. I personally really like Victron components, they are slick! I'm voting for the Victron Multiplus 24v 3000W. I also like the idea of having redundancy. 5% off @Northen Arizona Wind and Sun now. Pull the trigger.

Agree but it does come with a 4 year warranty...

https://www.solar-electric.com/ 6% Off, no tax and free shipping. Just got a couple...

What BMS are people using with Valence Lithium U27-12XP batteries? Do I even need one if I am only using 1 battery?

SOLD

Good to know, hopefully it will be a good situation for you. I called them and inquired about the batteries and other products. They seem straight up. Please lets us know how your findings.

Northern Arizona Wind & Sun | Off Grid & Grid-Tied Solar Power Systems (solar-electric.com) These guys will have 10% off most everything, no tax either and some sharp people work here.

Plus Shipping: US $492.63

How many hours a night would you run the AC and what size AC? The bottom line is you just need to figure out how many watts you will be using and scale everything else appropriately (Batteries, Solar Array, Inverter, Wire Sizes, Charge Controller and Breakers). I have 18KW of lead acid storage...

Yeah looks like a good deal...

I'm tempted to get a couple of these for my house in Mexico. Just don't know anything about BYD or the seller. https://www.techdirectclub.com/byd-lfp-24v-5-kwh-200-ah-battery-pack-with-bms-130a-lifepo4/

For what it’s worth I have 4 24V batteries I bought last year from battery evo and they have been great. I cycle them pretty much everyday and they are still very good. I primarily use them to charge my Tesla so they get a good workout.

Let me know how it turns out. I really would like to get a couple. It's a killer deal if its a good product.

Just saw this in craigslist, if you looking for BB, this is a good deal BATTLE BORN BATTERIES - general for sale - by owner (craigslist.org)