SMA Sunny Boy 4000US (SB4000US) Positive Ground Inverter | SunPower Replacement 300Ah The SunSaver's low cost is

The SunSaver's low cost is made possible by Morningstar's unique approach to design and manufacturing their charge controllers: automatic production

The answer is simple

SunKeeper™ solar controller provides a low cost regulated output directly from the solar module to maximize battery life in small solar power applications

this design will isolate the cell stopping any other damage and allows the battery to function safely

EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES

SMA Sunny Boy 4000US (SB4000US) Positive Ground Inverter | SunPower Replacement 300Ah The SunSaver's low cost isWhy these inverters are a great value: These are NEW OLD STOCK, A quality products in factory sealed boxes. USA Manufacturing, German engineering and superior design. (ARRA Compiant). Sunny Boy Inverters are the most popular solar inverters in the world for over two decades. Exceptional real world efficiencies make Sunny Boy the top choice for solar designers and installers. These inverters are among the most reliable designs SMA has ever built.