roddilkes wrote: Hi Barney,
What is your peak charge voltage?
That is, what is the highest voltage your charger gets to before switching off?
Hi Rod. I can answer this one...
I have noticed 2 different figures: 165ishV (in feb12) and 161V (last week, aug12).
Back in Feb I was noticed the floating charge process seemed out-of-whack (cant recall what I actually noticed, now, but I had been away for 4 weeks in January and someone else was keeping it charged up). Anyway, this particular night I did watch the main meter in the car every 30 mins or so, and at the time added notes on my 'smartphone' (aside: those phone makers have a way with words, eh?).
That evening (22feb12) charging had started around 6:15ishpm (I know, I know, but I wanted to watch it without staying up til all hours).
At 9:25pm, the pack voltage was climbing slowly towards 164.7V, and the ZIVAN charger was pushing 19.4A in. The apparent capacity was 96.9%.
By 9:35pm the Amps in had slowly dropped from 7A to 3A and by 9:35pm was 0.7A.
By 10:20pm the gauge reported 164.6V and 100% capacity. But not until 10:47pm did the Zivan beep, beep beeeeep its 'finished ok' tones and turn off.
Presumably this was some top-up charging process going on; normally the topping out is much quicker.
A few months later whilst charging I noticed it was hitting 161V and stopping. The long drawn out step from 96% to 100% seems to have gone. So 17may12 it stopped at 160V, capacity 99.6% at 10.30pm (cant recall when charging started, probably 8 or 9pm). Last week it was similar, voltage climbing to 161V and Zivan beeping finished without the long slow close of February.
By the morning the pack seems to have settles back to 150 or 151V. Does that tell us something?