[RE-wrenches] intermittent battery problem

[jay peltz]

the sunfrost has a very small compressor, which makes me very suspect that it could cause such a big bank to move at all.
I would suggest just running some big loads like a skill saw etc, and see what happens.
A bad connection/battery should appear with any large load. It would show up as low battery of course, and then you would have measure each battery under load.
I would also turn off the pv and wind to really make a good test.

a few questions.

what are the bulk voltage setpoints for the mx
and
what is the dump load setting on the diversion controller?

jay 
peltz power


On Oct 11, 2011, at 10:29 PM, Ron Young wrote:

> Client gave me the float readings from the MX and they look ok but there's been no float in the last couple of weeks. I've been thinking an electrical contact problem either inside the E-panel, the inverter or the battery causing the unexplained voltage drop. Brian and Mark you may be spot on. I'll have to try a load test on each battery.
> 
> Float readings from MX:
> Day14: 108 min.
> Day 18:  16 min.
> Day 22:  135min.
> Day 23: 115min
> Day 52: 156 min.
> Day 56: 243 min.
> Day 57:  112min
> Day 59:  100 min
> Day 61:  243 min.
> 
> Ron Young
> earthRight Products - Solareagle.com
> Alternative Energy Solutions ~ Renewable Energy Products
> 
> On 2011-10-11, at 5:05 PM, Brian Teitelbaum wrote:
> 
>> I once saw a brand new L16 battery that would read the proper voltage (6.3 VDC) and had good hydrometer readings, but the voltage would drop to zero when a load was applied. We were even able to do a dead short with a piece of #10 wire with only a faint spark visible upon connection, and then nothing.
>>  
>> The manufacturer replaced it (after much haggling and the usual “that’s not possible”) so I never found out for sure what caused it, but I suspected a fracture in one of the internal bus bars. Could be what you are seeing here since the voltage change is about 2V.
>>  
>> I second Mark’s suggestion to load test each battery
>>  
>> Brian Teitelbaum
>> AEE Solar
>>  

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