Along with others, I'm interested in using a SunampPV for my DHW.  The units currently on offer contain 2 cells which equates (roughly) to 4.4kWh worth of energy storage.  Having done my sums, I came to the conclusion that this wasn't going to meet our requirements and that I needed additional capacity. Having previously had discussion with Andrew @ Sunamp in respect of the Sunamp Stack, I asked if it would be possible for them to supply a larger (4 cell) SunampPV, which would give a capaci