There is huge benefit to running a farm on solar power. Energy requirements must be assessed to determine how much energy is required, and when this is required. High peak loads can often happen in the early morning or evening, and switching to a Victron Inverter system that can utilize peak shaving and cleverly shift storage-versus-charging times, can achieve massive energy bill savings, before one even considers the other massive benefits of going solar.
The most accurate way of knowing the power requirements and the peak draw times will be to place a data logger on the supply lines for a few weeks, preferably over a time representative of operating at peak demand (when most pumping, or processing, or machinery might be used).
The night-versus-day usage figures obtained from accurate data-logging are essential to determine how best the battery can be sized to allow effective cycling with peak shaving.
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