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craig shaw

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  1. Like
    craig shaw got a reaction from Scorp007 in battery imbalance and adding battery   
    thanks - we have 8 batts now - we charged and ran in two sets of 4.. we now let them equalise each to voltage by connecting them (off load and not in circuit) - we got the voltage to 53.36-53,40 ranges for the 8 - (like a waterfall). we will run and disconnect some time for them to settle and feed each other off load and not in circuit - might need a few hours just sitting..
    the SOC of the two sets were exactly the same 96,9% but voltages differed by 0,03-0,04V.. 6 of them are exactly 53,36 and only two are 53.37 and 53,40V.  its like 2 of them are HIGH achievers...
    ps they came from 2 batches 23 march and 28 march.  (4 each)
    DEYE DOES NOT HAVE A LARGE HV CHARGER HERE - BALANCING IS A BUGGER - big learning curve- HV batts on a deye 20kw - have to buy them in batches of 4... as the inverter does not turn on (DC circuit) with 3.... (160V) even with grid ON
    Lots of lesson learnt with HV system
  2. Like
    craig shaw got a reaction from WannabeSolarSparky in East/west panel installation   
    no feeding - just using and storing.....have to add more batteries - producing up to 70kwh per day now
  3. Like
    craig shaw got a reaction from BritishRacingGreen in East/west panel installation   
    hi guys
    i just finished my east west install and started generating power..
    15 east and 17 west panels
    getting about 2kw at 7am and 4 kw at 5pm with a peak about 12,4kw at 12/13:00
    at 10:40am getting about 10kw
    the late west pv production is lower than expected 6pm it dies now..rays are soft at 6pm
    9october.
     
  4. Thanks
    craig shaw reacted to Grootkoos in Sunsynk and Generator   
    I cannot see why not. As long as the output of your generator is stable and stays within the correct voltage and frequency parameters, you should not have a problem.
  5. Like
    craig shaw reacted to Steve87 in High Voltage (400V+) Battery Inverters   
    I think one needs not only look at the voltages etc. One needs to consider your loads. The HV inverters to me make a lot of sense for some large 3 phase loads like bore hole pumps that require cold start surge and inductive loads. The HV machines make heaps of sense due their transformer architecture. The smaller LV especially Sunsynk and Deye are transformerless in design. 
    Yes the HV batteries are scare but they make a lot of sense and the copper losses are much less. Prices are actually similar HV vs LV. Thats for FreedomWon anyways, i cant comment for the others, I only install these both HV and LV.
  6. Like
    craig shaw reacted to P1000 in Deye 12kw 3-Phase inverter MPPT question   
    Yes, which is one of the reasons you would choose 2x12 instead of 3x8.

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