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Updated: 36 min 20 sec ago

Re: Measure battery temp

39 min 37 sec ago
Flux
Thank you for your help.
gww

Re: Measure battery temp

1 hour 7 min ago
The sg is temperature dependent , it falls with temperature so what I think you are seeing is the maximum sg on full charge with temperature modest, then you are gassing and making heat, the sg then seems to fall as the temperature rises.

If you apply ...

Re: Measure battery temp

1 hour 24 min ago
Flux
My belief is it was low from the get go.  It is hard to be sure due to my first charging regiment was absorb at 57.2  volts and EQ at 62 volts.  My commissioning EQ was about 16 hours and the cell was as it is now.  My fm 80 was holding all charge...

Re: Measure battery temp

2 hours 37 min ago
Ideally with a new battery they should be equalized and sg adjusted to bring each one within limits. I am not sure whether your low cell has gone bad or whether the sg was never correct from new.

The main thing to watch now is that the bad cell returns...

Re: Measure battery temp

3 hours 59 min ago
maryalana
two degrees is not much, perhaps I will try that.

Flux
I have a doc wattson hooked to the battery at the 24 volt range.  In charging just the 2 volt cell, would it work simular, ie; just hook charger to the two volt cell and that is all that ...

Re: Measure battery temp

8 hours 44 min ago
Normally the temperature sensor is to set the charging routine to the battery temperature, which will be close to the ambient near the battery.

You are doing something different and are trying to limit destructive temperature, don't feed this temperatu...

Re: Generator specs aren't making sense

Mon, 09/01/2014 - 17:03
Another way to look at it is that the nameplate VOLTAGE at the nameplate speed is the sum of the voltage from generation at the nameplate RPM and the voltage drop from the nameplate current.

This is at full load, so the current (and thus its voltage dr...

Re: Passive solar tracking

Mon, 09/01/2014 - 16:41
Propane is best option has good thermal expansion rates. leak would just result in non operating unit with a layer of frost for a short while, you need a spark to follow for any flamage. As said simply place away from any ignition source where there is...

Re: AXIAL FLUX AND CORROSION

Mon, 09/01/2014 - 16:41
Why do ferrite magnets not rust?  Because they're ALREADY MADE of rust!

Unfortunately, ferrite magnets are not very strong.  It was the availability of
super-strong rare-earth magnets that made permanent-magnet alternators
a technology suited for a ded...

Re: Measure battery temp

Mon, 09/01/2014 - 16:19
I put a simple $7 remote thermometer inside my battery box to track air temps(that were within 2 degrees of rthe battery temp reported by my MPPT45).

Re: Measure battery temp

Mon, 09/01/2014 - 15:54
thirteen
Thanks, I don't know but the batteries have a metal case around them.  I was hoping someone was using something that they felt was working.  It seems simple and the clamp meter was better then nothing but I don't want to spend 60 plus bucks re...

Re: Active Pitchcontrol

Mon, 09/01/2014 - 13:50
We would like to find out if implementing the drone pitchcontrol on our windmills is possible.

Regards Rinus

Re: Measure battery temp

Mon, 09/01/2014 - 11:05
Would a digital house thermoste work by just glueing it on the side of a battery? Or even a remote monitor.  They do need a AA battery to work. I just replaced one in my daughters house so maybe. Just a idea. 13

Re: Measure battery temp

Mon, 09/01/2014 - 09:41
damon
Thanks for the reply.  I actually have outback mx 60 and fm80 charge controllers and they didn't play well with the temp senser attatched just on top of the battery cases.  I would like some kind of thermomitor that I can look at.  thought about ...

Re: Measure battery temp

Mon, 09/01/2014 - 08:28
With my Morningstar MTTP controller I bolted their matching remote temp sensor onto one of the (gel) battery terminal posts near the middle of the set.  Possibly an anode.

Rgds

Damon

Re: ATmega328P for OpenTRV use

Mon, 09/01/2014 - 08:25
Probably not appropriate at the moment though we have considered it repeatedly.

Basically the team needs to be available flat out for media access for an extended period, I believe, and we don't have that sort of time now!  I haven't yet given up the d...

Measure battery temp

Mon, 09/01/2014 - 07:03
What are you using to measure battery temp. I have a forklift battery. I unhooked the temp senser from the charge controllers on advice from outback tech support. There was no good way to put it on the battery.

I had been keeping an eye on the battery...

Re: Passive solar tracking

Sun, 08/31/2014 - 23:18
I've though of using propane.  Much cheaper than (other) liquid refrigerants.  Liquid at reasonable pressure.  Suitable containers and plumbing are easy to come by.

Site it far from the house, though.  You'd need several pounds of it, so a leak would m...

Re: Solyndra PV tube, what to do with it?

Sun, 08/31/2014 - 23:15
I think that their solar panels sold for about $5 per watt while regular silicon panels were around $2 per watt.

At that price point, they were doomed to fail without some super marketing plan.