3 ms·

AGM and gel type batteries are collectively known as valve-regulated lead-acid or VRLA types. The maintenance procedures you described are for flooded batterie

AGM and gel type batteries are collectively known as valve-regulated lead-acid or VRLA types. The maintenance procedures you described are for flooded batteries (FLA) and are neither required nor even possible with VRLA batteries. You can save even more money by using FLA if you're willing to do the maintenance. If you're not, the direct comparison is with VRLA. VRLA is much cheaper than the Powerwall on an apples-to-apples basis. It's hard to point to a specific source describing maintenance procedures that don't exist. For example, a common manufacturer's manual may be found at http://rollsbattery.com/public/docs/user_manual/Rolls_Battery_Manual.pdf http://rollsbattery.com/public/docs/user_manual/Rolls_Batter.... Note the difference between FLA and AGM (VRLA) maintenance procedures. Specifically, there are none for the latter.

deleted 11y ago
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- fredkbloggs 11y ago
  So that's your pitch, no vent? All modern VRLA batteries are fully recombinant and that vent is only for safety (see for example https://www.gsbattery.com/content/vrla https://www.gsbattery.com/content/vrla). It requires no maintenance, inspection, or installation accommodation according to any manufacturer's recommendations I can find. And unfortunately, lithium-ion cells have vents, too, for the same reason: to limit the risk of explosion due to overcharging or cell defects. See among many other examples http://batteryuniversity.com/learn/article/lithium_ion_safety_concerns http://batteryuniversity.com/learn/article/lithium_ion_safet.... You can find discussions of venting in these cells in articles about Boeing's problems with the Dreamliner batteries. I can see no material distinction here. Even if I were to accept that the vent design in Li-ion cells is superior to that of VRLA designs, it wouldn't justify paying twice as much for the same capabilities.

deleted 11y ago

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fredkbloggs 11y ago
So that's your pitch, no vent? All modern VRLA batteries are fully recombinant and that vent is only for safety (see for example https://www.gsbattery.com/content/vrla https://www.gsbattery.com/content/vrla). It requires no maintenance, inspection, or installation accommodation according to any manufacturer's recommendations I can find. And unfortunately, lithium-ion cells have vents, too, for the same reason: to limit the risk of explosion due to overcharging or cell defects. See among many other examples http://batteryuniversity.com/learn/article/lithium_ion_safety_concerns http://batteryuniversity.com/learn/article/lithium_ion_safet.... You can find discussions of venting in these cells in articles about Boeing's problems with the Dreamliner batteries. I can see no material distinction here. Even if I were to accept that the vent design in Li-ion cells is superior to that of VRLA designs, it wouldn't justify paying twice as much for the same capabilities.