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PostPosted: Jan 21st, '13, 20:23 
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Wifi board arrived today.

mwa ha Ha HA HAAA!!!

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PostPosted: Jan 21st, '13, 20:39 
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lol

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PostPosted: Jan 21st, '13, 20:42 
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lol exciting times!

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PostPosted: Mar 1st, '13, 05:49 
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Hmmm 12.2 volts this morning. I'm not sure why the voltage has been slowly dropping away... perhaps I need a better charger.

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PostPosted: Mar 1st, '13, 09:05 
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Hasnt it been cloudy and stormy down there?

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PostPosted: Mar 1st, '13, 17:22 
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rsevs3 wrote:
Hasnt it been cloudy and stormy down there?


Not really, and the system should have loads of headroom if it was.
It's as if either the battery isn't being charged enough, or I'm pulling lots more current than expected. Or the battery is losing condition I guess :-(

Hmmm I wonder if you can get mppt controllers for lithium ion :-)

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PostPosted: Mar 1st, '13, 17:28 
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Dude... dont waste your time with lithium ion!

You want LiFePO4 batteries. Far more stable and can be used as a regular battery replacement.

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PostPosted: Mar 1st, '13, 19:49 
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Gee that's great, I had no idea they existed. Bit expensive though?

How is your solar adventure going?

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PostPosted: Mar 1st, '13, 20:01 
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I have not got a price yet. I found them by having the same idea as you. Lol. Then I thought A123 batteries. Then found those batteries. I'm pretty sure that a 150A/Hr will give a full 150A/Hr before the controller cuts it out.

I'm waiting on parts for mine. Then it will be a goer :)

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PostPosted: Mar 1st, '13, 21:25 
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"LiFePO4 is a natural mineral of the olivine family".

There's an olivine family now? When did that happen?

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PostPosted: Mar 4th, '13, 00:08 
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Researching the prospect of building an electric car convinced me that LiFePo4 are the way to go. Overcharging? They shrug it off, not explode/catch fire like the Boeing planes.

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PostPosted: Mar 4th, '13, 17:34 
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What an interesting thread. Most of the electronics stuff goes straight over my head of course but i would love to go solar with my system one day.

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PostPosted: Mar 4th, '13, 17:36 
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What an interesting thread. Most of the electronics stuff goes straight over my head of course but i would love to go solar with my system one day.

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PostPosted: Mar 7th, '13, 16:40 
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Jimbo Rollins wrote:
Researching the prospect of building an electric car convinced me that LiFePo4 are the way to go. Overcharging? They shrug it off, not explode/catch fire like the Boeing planes.


They can still catch fire.

http://www.batteryvehiclesociety.org.uk ... php?t=1825

any "high" energy density battery needs a good Battery management system on each of it's cells.


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PostPosted: Mar 7th, '13, 20:47 
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Great info there DEnd, I just read that whole thread!

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