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Meanwhile, in lead acid battery land, a Trojan T-105 is ~$150 for a 6 volt, 225 amp hour battery, which you might comfortably cycle 0.9kWh each day for 5+ years
by jws 11y ago
Meanwhile, in lead acid battery land, a Trojan T-105 is ~$150 for a 6 volt, 225 amp hour battery, which you might comfortably cycle 0.9kWh each day for 5+ years. Use 12 of them to match the 10kWh Powerwall and it only costs $1800, replace them at the end of 5 years and you have about the same cost as the 10 year Powerwall.
Powerwall is several times smaller and lighter and presumably doesn't give off hydrogen gas when you charge it or burst and flood your room with sulphuric acid if you get to freezing temperatures with a discharged battery bank (done that), so there are certainly plusses.
It just isn't the silver bullet I was hoping for. I've been putting off replacing my batteries in a cabin while I wait for this, I suppose I'll nurse them through the Summer and make a decision in the Fall.
- Turbo_hedgehog 11y agoYou need 20, not 12, don't you? 6V*20 = 120V edit: the Powerwall runs at 350-450V, 5 amps nominal. Guess it depends on the inverter you use.
- teraflop 11y agoThe voltage is irrelevant. You can run an inverting 120VAC power supply from one battery, or a hundred, as long as it supports the right voltage range. Yes, putting 20 6V batteries in series would give you 120VDC, but that's not particularly useful. What matters is the energy capacity, which is measured in kWh.
- jws 11y agoThe 12 number comes from energy storage capacity. Voltage conversion and DC to AC is handled by your inverter/charger which is a separate item.
- kbenson 11y agoI guess the question is how long the powerwall is expected to last, and how novel the linking of them is (I have no idea). Additionally, we can hope that once the gigafactory is up and running, or version 2 of it is, that prices drop. Really, I think the big advancement here is attractive packaging of the product and experience, a la Apple.
- aptwebapps 11y agoI assume the Powerwall includes an inverter, what do they run?
- X-TraxxX 11y agoAt $150 a battery its a pretty good deal. There is a guy here in Ontario Canada that sells them for that price as well. His site is http://cartguy.ca/ http://cartguy.ca/ ( E-mail: sales@cartguy.ca Toll free: 1-888-905-2278 Our Location: 2933 Hwy 35 S, Lindsay, On K9V 4R4 Our Mailing address: 2 Peel St, Lindsay, On K9V 3L7) He also has the Trojan T-105RE for $199 a piece. Not sure if the advantage of the T-105RE is worth it.