BFL13 wrote:
Since the voltages are adjustable in "user", between trips you can pick the same voltage for absorb and float. Then the timing doesn't matter.
Smk is always asking about that time in absorb! :)
The "default" charging profile is the standard EP Solar one I had a couple years ago in the LandStar with that two hour fixed absorb time. The RN series has that too. This new BN series brings the "user" feature plus an extra 50v from 100Voc limit to 150Voc limit.
Trolling eBay.ca, I found the 40a, 4215BN with the MT50 remote and cable for $285 (Can) free shipping.
Don't know the price for a BN 20a, but a 20a RN with remote was $165 free shipping. A 20a Eco-Worthy is still about $100 but has 42Voc limit vs the 100Voc in the RN.
BFL,
Do to parking at work etc., I've had to re-think my set-up, and I now plan to do a roof top install, c/w tilt and twirl (and a custom vinyl cover to keep the snow and ice off when necessary), and probably MPPT. But I'm still not sure whether to go series or parallel (yes I know I would be better off with 24v panels now, but smaller, lightweight portable may still be in the not so far off future).
Correct me if I'm wrong; if I go MPPT, which ever way I wire is irrelevant, seeing as both will result in the same power output in watts (your favorite subject). Considering temps, rainy weather, etc., it seems if I go series I would have 35v x 8a for 280w, and if I go parallel I would have 17.5v x 16a for 280w. And on a rainy day, when amperage would suffer greatly, at say half, I would have 35v x 4a, or 17.5v x 8a, for 140w, either way.
The only other thing would maybe be the issue of shading or partial obstructions; which if I understand correctly, would indicate series wiring would be best?
