bajaguy
Elite Nomad
Posts: 9247
Registered: 9-16-2003
Location: Carson City, NV/Ensenada - Baja Country Club
Member Is Offline
Mood: must be 5 O'clock somewhere in Baja
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Tesla Powerwall 2
https://techcrunch.com/2016/10/28/teslas-powerwall-2-packs-o...
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DENNIS
Platinum Nomad
Posts: 29510
Registered: 9-2-2006
Location: Punta Banda
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The new target for enterprising thieves. Maybe hang it inside the garage?
"YOU CAN'T LITTER ALUMINUM"
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Russ
Elite Nomad
Posts: 6741
Registered: 7-4-2004
Location: Punta Chivato
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It's great that there are more and more options for our full time solar systems. I just bought new batteries 2 years ago so I'll have some time to see
how these Tesla power cells hold up and if they're going to be cost effective. Maybe as new innovations are developed the cost of lead acid batteries
will become more reasonable. I hate the maintenance of lead acid batteries. Telsa's roof tiles seem like an attractive option too.
Bahia Concepcion where life starts...given a chance!
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ehall
Super Nomad
Posts: 1906
Registered: 3-29-2014
Location: Buckeye, Az
Member Is Offline
Mood: It's 5 o'clock somewhere
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Technology keeps pushing forward. Tesla new car with roof solar panels is interesting also.
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larryC
Super Nomad
Posts: 1482
Registered: 8-11-2008
Location: BoLA
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Didn't we just go over this stuff a month or 2 ago? Or is this something new from Tesla since then?
Off grid, 12-190 watt evergreen solar panels on solar trackers, 2-3648 stacked Outback inverters, 610ah LiFePo4 48v battery bank, FM 60 and MX60
Outback charge controllers, X-240 Outback transformer for 240v from inverters, 6500 watt Kubota diesel generator.
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Fastbird
Junior Nomad
Posts: 39
Registered: 10-20-2013
Location: Chivato
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Tesla Not Marketing for OFF Grid Systems
The Tesla powerwall system is meant for typical grid tied solar systems where the panels are in series to get a voltage in the 400 volt range. So if
you want to use this Tesla battery in an off grid system you need to get the voltage from the panels or batteries up to about 400 volts . Then the
voltage output has to be 240/120 for use in your house.
If you want Lithium Iron P04 (LFP) batteries , they are typically 3.2 volts per cell and of varying Ahs up to 700. 8 of the 3.2 volt cells will get
you to a 24 volt nominal system. Thus you can use your present inverter and solar charge controller. Then you should have a BMS ( computer) that
keeps the cell voltages balanced. There is no maintenance and you can draw out 80% without shortening the life/cycles.
Specifications[VERY HARD to FIND!)
Since March 2016, there was only a single model: the 6.4 kWh version for daily cycle applications[7], before the Powerwall 2 was introduced:
Model Price Voltage Current Power Energy Energy per price Operating temp. Weight Dimensions (H x W x D)
1 US$3,000 350–450 V DC 9.5 A 3.3 kW 6.4 kWh
2.13 Wh/US$ −4 to 110 °F (−20 to 43 °C) 214 lb (97 kg) 51.3 in × 34 in × 7.2 in (130 cm × 86 cm × 18 cm)
2 US$5,500 7kW peak / 5kW continuous 13.5 kWh
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StuckSucks
Super Nomad
Posts: 2306
Registered: 10-17-2013
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Tesla Unveils its New Line of Camouflaged Solar Panels
Also, scroll down for more on the Powerwall.
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MulegeAL
Nomad
Posts: 298
Registered: 8-25-2009
Location: PDX/Mulege
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I wonder if they have made any progress with shading issues that lead to large voltage output drops.
Seems like having so many discrete tiles/panels could offer some wiring/gridding options to deal with that. I have no idea how these tiles
interconnect.
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