Modular - Additional panels and controllers can be easily added if required. Ideal for small auto or marine systems requiring only 1 - 2 solar panels. Great low-cost setup for smaller-scale off-grid systems up to 6kW Very high efficiency - up to 99% battery charging efficiency (using MPPT) MPPT charge controllers are a relatively cheap, very efficient and secure way of ensuring batteries are charged even in the event of an AC shutdown - this is especially important in remote locations. There are also higher 600V units available from Schneider Electric and Morningstar, although these are much more expensive and don't have multiple MPPTs inputs like many solar string inverters used in AC-coupled systems. Higher voltage MPPT solar charge controllers are available, up to 250V from Victron Energy and 300V from AERL in Australia, which enables longer strings and can be used with larger solar arrays up to 6kW. Higher voltage MPPT solar charge controllers Due to the common 150V upper voltage limitation of many low-cost MPPT solar controllers, only 3 panels can be linked in series, which means for larger solar systems above 3kW the installation can become more complex and involves combining strings of panels in parallel with fuses.
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