This is a 30W LED, I want to know how much power to V with a?

Answer:

This voltage should be 24 volts, because the 12 volt is the 4 string plus a resistor, this power is directly connected220 after voltage transformer power should meet the requirements, preferably 50 Watt remaining marginThe 24 volt battery can be connected by positive and negative electrodes

220 inputs need 40W AC output 24V transformer, full wave rectifier after capacitive filter can beUsing 24V or 12V battery battery needs to boost module, go to Taobao to buy an adjustable booster module, the output voltage can be 27-36v, 24V battery needs more than 10AH, 12V battery needs more than 20AH, otherwise the battery easily burned

This is a lamp combination of single 1W and LED. 10 on 3 and a total of 30 composed of 30WLED lamp...The power supply voltage needs 3. 5X10 about 35 volts or so...220 volts input, then the secondary voltage at least 36 volts above, but to have constant voltage constant current circuit, otherwise, life will be reduced much...24V power, it is best to boost the circuit up to about 35 volts, can also be brought directly, but the brightness and power of less than 30W standards.