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Small scale solar MPPT wins 21% | 47 comments (47 topical, 0 editorial)

Re: Small scale solar MPPT wins 21% (3.00 / 0) (#4)
by tecker on Tue Aug 26th, 2008 at 10:35:01 PM MST
(User Info)

I don't understand the blue glazing . The circuit is interesting C3 can go away it's just there to keep the ripple shunted . batteries like ripple just fine As a matter of fact the caps won't react at all across a battery . looks like your wasting power at Qi Sb540 is a 5A schottky . Looks like fun

Re: Small scale solar MPPT wins 21% (3.00 / 0) (#5)
by elt on Wed Aug 27th, 2008 at 08:24:01 AM MST
(User Info)

In hindsight, it was probably a mistake - I thought that painting the inside of the box blue would make it look more like a "real" panel at a distance. Now I think that it adds to the heating and voltage loss. At any rate, the glazing is clear Lexan.

> [...] C3 can go away

C3 is a .22 uF polypropylene cap; IIRC, it was suggested that I put one in a different design to protect the FET from switching spikes and I just copied it into this one. That cap is big and expensive, I'd be happy to put it back in the cap pile if you think it's not needed here.

Thank you,
- Ed.

[ Parent ]

Re: Small scale solar MPPT wins 21% (3.00 / 0) (#6)
by tecker on Wed Aug 27th, 2008 at 09:41:21 AM MST
(User Info)

There's no spikes the battery doesn't obsorb here and no doubt the caps is retaining battery voltage . Keep working on it

[ Parent ]

Small scale solar MPPT wins 21% | 47 comments (47 topical, 0 editorial)

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