โOct-18-2017 10:42 AM
โOct-20-2017 09:53 AM
โOct-20-2017 09:14 AM
โOct-20-2017 08:14 AM
โOct-20-2017 08:03 AM
โOct-20-2017 07:45 AM
Almot wrote:Itinerant1 wrote:
These are lithium batteries no absorb.
Alright, then you donโt need to push it to 95%. They are happier when staying in 20-80% range.
There is no Absorb or Float in Li battery, but the Float on the controller should be set low enough for BMS to stop charging (in absence of loads). I doubt that your battery BMS will automatically do this at 85%, so you'll have to do it yourself.
RV.net server is finicky today. No service, and then suddenly double and triple post.
โOct-19-2017 10:14 PM
โOct-19-2017 10:14 PM
โOct-19-2017 10:12 PM
Itinerant1 wrote:
These are lithium batteries no absorb.
โOct-19-2017 05:18 PM
liborko wrote:
Good catch time2roll. I realized that as soon as I posted it.
โOct-19-2017 05:15 PM
โOct-19-2017 03:56 PM
โOct-19-2017 03:49 PM
liborko wrote:Actually there are 9 bypass diodes (not resistors) in series.
Output from panels in series with one panel in shade:
8A*30V+8A*30V+0A*0V=0W !!!
Your analysis would work if there were 9 resistors in series.
โOct-19-2017 03:38 PM
โOct-19-2017 02:34 PM
Almot wrote:Itinerant1 wrote:
... battery bank normally gets back to 95-100% even after a couple/ few days of playing catch up but in this location it's been getting to 70% (350ah) by sundown ...
That's what seemed odd to me that I wasn't gaining back the lost power after a couple days of heavy overcast and snow. The way I'm parked and the path of the sun is enough for the antenna shadow to stay on the panels a fair amount of the day.
Hard to tell why it couldn't catch up to 95% when changing the location. Antenna shade could've contributed, or this location had some trees/mountains blocking the early sun when you needed it the most, or there is less sun in late October than it was in August :). Or you changed the time pattern of loads. Increased current is needed only until you get to Absorb, then you can get by with very little charging current - until you turn some heavy loads on. If battery can't catch up past 70% - change the way you run loads, avoid running heavy loads after sunset.
Most solar systems require a fair amount of self-discipline, charging all the tools and running other loads is better in daytime - especially after the battery went to Float. Then you could use the energy from the sun directly, rather then discharging the battery. Battery stays in Float, sun runs your devices.