If anyone is interested "Tesla Powerwall" is being sold on Lazada ????

 

https://www.lazada.co.th/products/must-10kwh-ess-tesla-powerwall-48v-200ah-lifepo4-battery-hybrid-grid-home-solar-energy-storage-system-i2777108044-s10101632895.html

 

Hardly "Tesla" but it's in a nice box and the size and weight are about right for a 200Ah x 48V LiFePO4 pack, looks like a reasonably "smart" BMS too.

 

You could probably DIY a pack for half that but no nice pre-packaged box.

 

70kbht seems expensive for 200AH.

200AH gel batteries cost 10Kbht but you can only use 1/2, so 200ah would in reality cost 20Kbht.

 

I'd rather pay 60Kbht for 600AH of usaable storage capacity in old tech.

19 minutes ago, BritManToo said:

70kbht seems expensive for 200AH.

200AH gel batteries cost 10Kbht but you can only use 1/2, so 200ah would in reality cost 20Kbht.

 

I'd rather pay 60Kbht for 600AH of usaable storage capacity in old tech.

 

Don't forget it's 200Ah @ 48V nominal (about 10kWh) ???? 

 

So you'd need 8 x the 200Ah gel batteries for the equivalent storage.

And it's Out of Stock already so some AseanNow Member (maybe) has snapped it up ????

3 minutes ago, MJCM said:

And it's Out of Stock already so some AseanNow Member (maybe) has snapped it up ????

So quick, there will be more.

10 minutes ago, MJCM said:

And it's Out of Stock already so some AseanNow Member (maybe) has snapped it up ????

 

Would I do something like that???

 

If I had the $$$, of course

30% more expensive, only one left, get them whilst they're hot!

 

https://www.lazada.co.th/products/lithium-phosphate-battery-power-wall-48v-512v-200ah-lifepo4-battery-10kwh-i2771668007-s10076827453.html

 

10 units available & sold by same dealer on LAZ w/1 unit ... t j solar

and about 5000 baht less

https://shopee.co.th/MUST-10kwh-Ess-Tesla-Powerwall-48V-200Ah-LiFePO4-Battery-Hybrid-Grid-Home-Solar-Energy-Storage-System-i.35505682.13112340074

Here's a better deal, 24v 200AH for 28kbht.

Two of these give you the same storage for 56kbht, a saving of 14kbht.

https://shopee.co.th/แบตเตอร์รี่-Lithium-Lifepo4-24V-200A-มี-BMS-มีของพร้อมส่ง-i.195327111.3945196897?sp_atk=9810f562-8984-4cbd-b46b-f111df525e54

16 minutes ago, BritManToo said:

Here's a better deal, 24v 200AH for 28kbht.

Two of these give you the same storage for 56kbht, a saving of 14kbht.

https://shopee.co.th/แบตเตอร์รี่-Lithium-Lifepo4-24V-200A-มี-BMS-มีของพร้อมส่ง-i.195327111.3945196897?sp_atk=9810f562-8984-4cbd-b46b-f111df525e54

Would it be a problem for the BMS inside if you put them in series , to create 48V ? I do know for parallel it is no problem ,

7 hours ago, sezze said:

Would it be a problem for the BMS inside if you put them in series , to create 48V ? I do know for parallel it is no problem ,

 

It will work fine, mostly (and you could do it with 4 x 12V packs too which might be even cheaper).

 

A couple of caveats.

 

You need to top-balance both packs before connecting them in series so they both have the same charge level.

 

If you start out with one at low charge and the other at high charge then when in series the high charge one will become full and its BMS will cut off before the other pack has reached full charge (so it never will). Conversely when discharging the lower charge pack will become empty first and cut off the discharge path leaving unusable capacity in the higher charged pack.

 

Even with a top-balance any mismatch in capacity of the two packs will, over time, result in them getting further and further out of sync, eventually also leading to the above.

 

Of course, the issue is easily fixed by another top-balance.

 

Buy your packs from the same source at the same time to get the most similar packs.

 

I'll stick with my used golf-cart cells, 200Ah @ 1,600 Baht (about 80% of rated capacity left), 16 needed plus a 16s BMS.

Tesla in my Issan farmhouse - likely not

Teslas in the Emporium parking garage for which the hi-sos gladly pay 100% markups - yeah

4 hours ago, Crossy said:

 

It will work fine, mostly (and you could do it with 4 x 12V packs too which might be even cheaper).

 

A couple of caveats.

 

You need to top-balance both packs before connecting them in series so they both have the same charge level.

 

If you start out with one at low charge and the other at high charge then when in series the high charge one will become full and its BMS will cut off before the other pack has reached full charge (so it never will). Conversely when discharging the lower charge pack will become empty first and cut off the discharge path leaving unusable capacity in the higher charged pack.

 

Even with a top-balance any mismatch in capacity of the two packs will, over time, result in them getting further and further out of sync, eventually also leading to the above.

 

Of course, the issue is easily fixed by another top-balance.

 

Buy your packs from the same source at the same time to get the most similar packs.

 

I'll stick with my used golf-cart cells, 200Ah @ 1,600 Baht (about 80% of rated capacity left), 16 needed plus a 16s BMS.

Here a Video about what Crossy is saying (it helped me to understand it better)