joshuafarmer
Active member
if I were to purchase the new 200 watt kit from renogy what would be best for a battery bank Im thinking 2 12volt but what size should they be whould 2 100 ah be too much or should I go smaller idk
scottorious said:Certainly wouldn't be too much. You might get advice to get get 2 big 6 volt true deep cycles and link them in series. I suppose the an important question is, what do you want to power?
joshuafarmer said:ANY RECOMENDATIONS ON INVERTER SIZE
This world isn\ said:I think the heat producing appliances on 120V are too much of a draw with your present thoughts. You'd need much more storage capacity, a bigger inverter than most, and a better way to replenish your batteriues than 200 watts of solar, especially given shorter winter sunshine hours and cloudy days.
If you dump the 120v heating/cooking idea, stick with either 12v appliances (Roadpro is a brand truckers use) or use propane, then you can do what you want with either the two 12v marine batteries or better yet, the two six volt golf cart batteries (which are true deep cycle as opposed to hybrid batteries like the marine style). Either way you need to read up on the electrical forum threads for cooking appliances and decide if the big investment in equipment is what you want compared to easily used propane.
John61CT said:Watts are not a per day, or per any time, measurement.
Watt-hours yes, so panels putting out an average of 700W over 5 hours (best case in winter? ) would be 3500 wH per day.
Assuming high efficiency charging at 14+V that would be 200+AH in theory available for replenishing the bank. Lots of other real-life factors make the power actually absorbed much lower.
Just as an example explaining the measurement units, no idea if that's in line with the actual scenario here.
That is per day production - you know that right?DLTooley said:200 watts of panels. At actual operating efficiencies 700wh is a reasonable rough calculation during the winter.
I can't decipher all the pseudo HTML there, so I'll just saygeogentry said:font tags
geogentry said:That is per day production - you know that right?
Yes I know that the term watts or amps is inclusive of a time factor and assumed when discussing those terms. When a motor is rated as needing 5 amps rarely do you see that it will have a much larger amperage draw when it initially starts, unless you read the technical specifications. As for the constant draw and the cycling effects - a 1200 watt heater will not draw any amps when it cycles off -which it is assumed people know- but is still rated at 1200 watts. And the hour tag is also assumed. It will use 1200 watts per hour while operating. They abbreviate it to 1200 watts for simplicity. Mathematically it is an instantaneous measurement but for practical purposes it is a durational time element.John61CT said:I can't decipher all the pseudo HTML there, so I'll just say
Watts are an instantaneous power measure, the unit already internally represents a flow rate with a time element included, just like amps.
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