XPost: talk.politics.guns, sci.energy   
   From: muratlanne@gmail.com   
      
   "cshenk"  wrote in message   
   news:f8KdnXJdAcArXQP4nZ2dnZfqn_WdnZ2d@giganews.com...   
      
   Don't be so tied to battery backups.  It's not a 'can't afford it yet'   
   in the way you seem to be pushing.  It's 'may add a 4-6 hour unit' to   
   prevent higher peak hour consumption rates'.  With no cut-out switch,   
   it's only usable when grid is up.  The potential jackery backup is for   
   use during grid down times for basic comfort.   
      
   You seem to address this from 'desirement'.  This is very different   
   from my point view which is 'requirement' based.   
      
   The math doesn't work out here on 'bang for the buck'.  You did catch   
   that I only produce 92% of my annual needs' right?  A honkin' big   
   backup battery setup would not only never fill, some of it would be   
   lost whereas I am protected from any loss as it is as that storage is   
   nown the problem of the grid.  I get all of it back with no loss.   
      
   ---------------------------   
      
   I didn't check the details, but this is a very competitive price per KWH and   
   hopefully a good sign of a continuing downward trend.   
   https://sungoldpower.com/collections/new-years-sale/products/5-1   
   kwh-powerwall-lifepo4-lithium-battery-sg48100m   
      
   Being LiFePO4 it doesn't ever need to fill, the suggested charge level for   
   maximum life is 60-80%. It or similar could be charged from 120VAC when your   
   rate is low and used when it's high, or saved for outages, avoiding the   
   expense of new panels and their installation and wiring.   
      
   However the IRS apparently doesn't allow a Form 5695 deduction for batteries   
   not exclusively charged by alternate energy. I arranged my system so only   
   the batteries for daily cycling I bought used at a flea market and didn't   
   claim are charged with a prioritized mix of solar then grid when solar   
   output is low or uncertain. In clear weather I switch the grid input off and   
   discharge the battery overnight. The batteries bought new and claimed are   
   separately solar charged in clear weather and saved for outage backup.   
      
   The most common use of the system is to go on battery when a night squall   
   line or thunderstorm is predicted, so my electronics are isolated from the   
   power line.   
      
   If you have a secure location like an enclosed deck a Jackery etc could be   
   charged outdoors from free-standing panels either aimed due south or   
   occasionally shifted toward the sun. I made fold-out panel rear supports   
   from 1/2" electrical conduit bent into a V. On clear days my batteries   
   recharge before noon and the initial 10AM panel aim is enough. 100W panels   
   are now below $70.   
      
   Since I build whatever I want I have no experience with Jackerys or similar.   
   I do have an old Harbor Freight 5-in-1 power pack refitted with LiFePO4 but   
   18Ah (216Wh) won't run much overnight.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)