diy solar

diy solar

Recent content by rdanneskjold

  1. R

    SOC vs. additional series battery

    sorry, I wrote that post in a fit of insomnia. I meant 4S4P. 100Ah deep cycle AGM 12v each for 48V. I was asking about charging 60v of battery capacity to only 48V. apparently there is no benefit with lead-acid batteries by doing this. My understanding is that deep cycle batteries can be...
  2. R

    SOC vs. additional series battery

    I read somewhere that charging the last 10-15% of a battery causes it to expire earlier than they otherwise would. IOW, charging a 3.8v battery to 3.4v greatly extendes the battery's number of charge cycles. First, is this true? yes, you give up significant capacity, but your battery will last...
  3. R

    Controller for Everything!

    In full disclosure, it is my style to begin with over-complex designs, and work backward toward simplicity. ;)
  4. R

    Controller for Everything!

    Hello, I am in the beginning stages of implementing a backup power system for my house. I live in SoCal, so power here is expensive. but that is not my motivation. I am looking for power security, and do not want to be reliant on the grid. Fire season is coming, and because of last year's...
  5. R

    Battery Series-Parallel Basics

    I know a guy who will spend $10 to save $1 in taxes. That ain't me, but I do get obsessive.... ;)
  6. R

    Battery Series-Parallel Basics

    sorry, the 'parallel question' was implied.... it's a question about capacity, one way or the other. You answered my question--thank you! This is for a battery backup power source for my home. at present the plan is to run my natural gas powered generator (which is actually tri-fuel) to charge...
  7. R

    Battery Series-Parallel Basics

    Hello All, My first post here. I am building an AGM battery bank, and I have a question about wiring these things in series and/or parallel. The current plan is to use 4 x 12V for 48V. but, why not five for 60V or six for 72V? or 144V? I know balancing is an issue for series packs, but...
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