Question for all you solar experts
I have ordered a 250 watt Sharp 24 volt Solar panel. Now for my question. I would like to use a Morningstar Sun Saver 15 MPPT controller. The problem is that the sales person said that the 15 amp MP...
Forum Discussion
The Morningstar MS-MPPT-15 will clamp output at 15 A. If you exceed the input up to 70 V, IIRC, the maximum output will still be 15 A. With two 24V nominal panels in series you may be exceeding the high voltage rating, depends on panel voltage maximum and if you connect them in parallel or series.
I use this controller with a single 235W panel. It performs excellently. The RS232 interface is a seamless way to adjust charge voltages and observe charging characteristics. When I plotted my system, I took into consideration adding another panel. I decided I could, at that future point, add another controller if needed. As it has turned out, the single panel meets my charging needs. One surprise to me is that these polycrystalline modules will still be harvesting power on the shoulder hours of the day. Mine harvests even at sundown, albeit at very low amperage output. It is "the little controller that could".
I use this controller with a single 235W panel. It performs excellently. The RS232 interface is a seamless way to adjust charge voltages and observe charging characteristics. When I plotted my system, I took into consideration adding another panel. I decided I could, at that future point, add another controller if needed. As it has turned out, the single panel meets my charging needs. One surprise to me is that these polycrystalline modules will still be harvesting power on the shoulder hours of the day. Mine harvests even at sundown, albeit at very low amperage output. It is "the little controller that could".
