Battery / Solar Panel Size for Fridges
BATTERY & SOLAR PANEL SIZING CHART FOR 12V FRIDGES
This guide has been developed to provide at least 3 days running power with a maximum battery discharge of 60% with zero sunshine.
The solar panels noted below will have the ability to bring your batteries back to 100% with a full day of sunshine. For lithium batteries, only 60% of the AGM battery capacity (Ah) is required.
Generally, slightly less than double the Ah battery storage is recommended in watts of solar when matching solar panels with batteries. Eg: a 100Ah battery would require approximately 200watts of solar.
Please note: all values are approximate. Generally, the amount of battery and solar needed has been over estimated.
|Fridge||1hr (Ah)||1 Day (Ah)||3 Days (Ah)||AGM Battery Size (60% Discharge after 3 days)||Solar Panels|
|35 - 52L||0.8||20||60||100Ah||200W|
|50 - 65L||1.0||24||72||120Ah||200W|