General > General Technical Chat
Watt the fμck?
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paulca:
Sure the ideal way to keep a UPS SLA bank topped up is a small 12V solar panel?
james_s:

--- Quote from: AVGresponding on September 30, 2022, 01:12:27 pm ---Never seen one here in 30 years in the business. Sounds like it's a 7 that's just been qualified at a different, lower, discharge current. Either that or it's a Chinese "9Ah" like those 900,000mAh power banks and 5000mAh 18650's on ebay.[/color][/size][/b]

--- End quote ---


Or technology has improved and they're able to pack a bit more into the same size package?

Power Sonic is a reputable brand, they offer both a 7 and 9Ah battery, Digikey is a reputable seller and carries them, albeit at an inflated price. I have about half a dozen UPSs with that size and they all came with 9Ah batteries in them.

https://www.digikey.com/en/products/detail/power-sonic-corporation/PS-1290-F2/13577465
Neper:

--- Quote from: AVGresponding on September 30, 2022, 01:12:27 pm ---Never seen one here in 30 years in the business. Sounds like it's a 7 that's just been qualified at a different, lower, discharge current.
--- End quote ---

From what I understand, they use a somewhat different technology named AGM (for Absorbent Glass Mat). No lead gel as before but fibreglass mats soaked with a liquid electrolyte. Might explain the slight difference in capacity.
mikerj:

--- Quote from: nali on September 28, 2022, 08:32:05 pm ---What about those natty little in home displays you get to tell you how much money you're saving with your smart meter? (according to the sales propoganda)

--- End quote ---

I presume the power that the smart meter requires is drawn from the unmetered side?  Anyone know typical power draw?  Guessing not huge but when there is millions of the bloody things...
Gyro:
We all hope so. Given that smart gas meters are powered by a big lithium primary cell that we didn't get charged for, it seems likely.
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