ECO-WORTHY (Brand+) via AliExpress [aliexpress.us].
ECO-WORTHY 48V 100Ah Wall-Mount LiFePO4 Lithium Battery 5.12KWh for Home Solar Storage $667 + Free Shipping from US warehouse.
Apply coupon for $90 off at checkout USSS90.
Key Features:
- Capacity:​ 100Ah (5.12KWh) rated energy, 51.2V system voltage.
- Chemistry:​ A-Grade LiFePO4 cells with 6000+ cycles at 80% depth of discharge.
- Low-Temp:​ Works from -20°C to 55°C, charges/discharges even at -4°F (-20°C).
- Installation:​ Flexible wall-mount or floor-standing with included bracket and conduit box.
- Monitoring:​ 4.3-inch smart display with Bluetooth & Wi-Fi for app control.
- Protection:​ Multi-layer safety with smart BMS, 125A breaker, and built-in fire suppression module.
- Power:​ 100A max continuous charge & discharge current.
- Expandable:​ Supports parallel connection of up to 32 units for larger systems.
Note:​ You must be signed into your AliExpress account and have your address added to your address book to add items to your cart and place an order. You may have to manually type in the promo code to apply it at checkout. Price may fluctuate slightly with currency exchange rates.
https://www.aliexpress.us/item/32...10631.html 
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This guy explains how to do what your asking better than I can. https://m.youtube.com/watch?v=p0A_zzM
It seems too small to do much on its own, so multiple ones will need to get lined up. So rack mount seems preferable.
A separate inverter needs to be wall mounted.
5kw might cover a small house.
So mainly for off grid small buildings? Or limited backup power? Or maybe a small personal electric car charging station?
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It has a rating for light sprinkling of water like an accident, but it not designed for exposure to the outside elements. Also, it requires ventilation, so you can't just enclose it in a large NEMA rated box for protection from the elements as it would prevent proper ventilation.
It seems too small to do much on its own, so multiple ones will need to get lined up. So rack mount seems preferable.
A separate inverter needs to be wall mounted.
5kw might cover a small house.
So mainly for off grid small buildings? Or limited backup power? Or maybe a small personal electric car charging station?
Easier to mount that a server rack battery for something like that IMO.
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