David Baillie

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since Jan 07, 2016
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kids dog books chicken earthworks cooking solar wood heat woodworking homestead
Builder, tinkered, gardener, charcoal gasification enthusiast.
North central Ontario
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Recent posts by David Baillie

The heat loss in winter through those skylights will be an order of magnitude higher then any residual heat that might be left from warmer time... skylight aesthetics are nice but they totally mess up heating and cooling...
3 weeks ago
My math says about 1 tonne of stored carbon per acre per year stored in my woodlot... Permanently harvestable as biomass. Pretty damn neat machine. I still like my solar panels though.
4 weeks ago
If you can try to locate some old patio doors. they tend to pe tempered glass which can deal well with the heat the cell put off. Build your own has kind of gone away with dirt cheap panels. Lots of adds online for 230-260 watt panels for anywhere from 15 to 25 cents a watt all done... Lots of the farms have upgraded to the newer panels and flooded the market with 7-10 year old perfectly good panels...
Just a thought. Good luck on your project.
Cheers,  David
4 weeks ago

Kimi Iszikala wrote:Blue Sky response:

Those are great questions.  First, there is no 'burning' of the saltwater electrolyte.  They are sealed and never require any maintenance.  

As I mentioned in a previous mail, our batteries are 500W each, continuous power, so that particular comment is fairly accurate.  3-4 of our stacks match the capacity of one Discover (~7.2 kWhs).  But that one Discover can handle load of 7kW (if your inverter is that large), which will cover a lot of surges!  3-4 of our Saltwater batteries want to see about 1.5-2.0kW continuous charging/discharging.  8 Saltwater will want to see roughly 4kW.  Your 2 Discovers will not flinch at loads up to 14kW.  Our saltwater (and Aquion) are 48V batteries with a continuous charge / discharge of roughly 10amps (~500W).  They can surge up to 20amps for a few seconds.  

Love their fast and thorough response.  Not sure my hub will love the less fast and less thorough response of the batteries, though...

Do you know -- if we have a backup generator, does this just mean that with power surges (well pump, power tools, etc), if we overtax the batteries, the whole house backup generator will kick in?  Or is it going to be a pain in the neck when we get big surges, with shutdowns & reset etc?

that is the most of it. So if you overtax the batteries the voltage will crash and the inverter will reset. Good to know about the electrolyte learn something everyday..
1 month ago
You will burn more water on the saltwater then a lead acid.
1 month ago
its basically the same technology as the aquion batteries. Bluesky energy tried to buy Aquion but it seems they are now out of bankruptcy protection and making batteries again so you could also research Aquions for reviews. The technology is interesting but the power density is low so your bank will be quite large. The big problem Aquion had was how fast each stack of batteries could give up amps or absorb them. It was really really low like in the 30 or 40 amp range. You had to gang up many strings of quite expensive batteries to get say 100 to 150 amps of draw at 24 volts for a 2.4 to 3.5 kW load not unusual when it comes to starting a deep well pump. Same thing if you wanted to have a larger array you needed too many strings of batteries to get the charge rate you wanted. I never used them just trouble shooted a battery bank for someone. I found that flooded lead acid beat them even factoring in midlife battery change out. That was 3 years ago maybe prices have changed.
Cheers,  David
1 month ago

Jeremy Baker wrote:

David Baillie wrote:.make sure you incorporate a BMS for the lithium cells to not over discharge them. Most of the rest has been covered above. If you are building a system using a midnite kid spring for the 2000 watt inverter...

The Electrodacus BMS I have is rated for 12/24 volts not for 48 volts unfortunately. This is one of the biggest complaints about it otherwise it’s a amazing device. Any suggestions on BMS rated for 48 volts? Thanks

No good recommendations for a BMS unfortunately. Why not use the 24 volt configuration if you like the BMS you have? The kid will do 25 amps at 24 volt so it should cover the 460 watt panel...
2 months ago
.make sure you incorporate a BMS for the lithium cells to not over discharge them. Most of the rest has been covered above. If you are building a system using a midnite kid spring for the 2000 watt inverter...
2 months ago
If you want to incorporate solar electric heat it gets easy if you run pex and water. There are 24 volt dc rated heating elements that could take the feed from a 60 cell panel when it was available....
2 months ago
To add perspective 1 lb of wood has roughly 7000btu in it or roughly 2300watts or 2.3kW of heat energy. In the darkest part of the winter in Nova Scotia you could expect an average of 1.5 hrs of sun. So each kW of installed solar 0anels can be expected to produce as much heat as 1lb of firewood.
Cheers,  David
2 months ago