I am planning to buy solar panel 10W, including 7 Ah SLA battery for my light.?
How to determine light / LED Specifications (Watts, amps, volts, etc.) that fits for this system? Yes, John, I'm trying to determine the maximum light power for this system and expects the light of at least 4 hours daily
7 Ah x 12 V = 84 Wh. Draining the battery below 50% will damage it, and for long life, can go only about 20%, but let's assume 50%. 84 kWh x 50% = 42 Wh Duration = 4 hours 42 Wh / 4 h = 10.5 W at full load that a decent LED light. If the Group can recharge the battery each day depends on conditions sun and if the group is actually 10W or not.
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