Solar Boost 2000E input voltage
Comments
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Re: Solar Boost 2000E input voltage
See this post
http://forum.solar-electric.com/showthread.php?p=25841&highlight=lensing#post25841
about solar / cloud / lensing effect. It does happen, and coupled with the cool panel, and bright edge, you get a brief boost. A MPPT controller should handle it fine, only lasts a couple seconds, I don't know how a PWM controller would deal with it - fine, or fry?Powerfab top of pole PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-Lister , -
Re: Solar Boost 2000E input voltage
In general, a good quality MPPT controller will "manage" it output current and internal temperatures even with presented with an edge of cloud event (the MPPT is designed to self limit)--so I would not worry at all.
A PWM solar charge controller does not need to "know" its output current--so the less expensive ones may have an issue...
However, current for a solar panel actually drops a tiny bit as the panels cool off (current output is pretty much flat with temperature for our needs here).
The Edge of Clouds event is both a lensing and a temperature effect (increasing voltage from cool panels and somewhat increasing current due to lensing)--and since a PWM charge controller cannot convert the "voltage rise" into added current output--the Edge of Cloud effect would be much less noticeable for a PWM controller.
So--I would doubt that a good quality PWM controller would be affected much (if at all) by such an event.
-BillNear San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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