Battery Usage Time Calculation:
1)The working time of inverter, it is depend on the battery power and load power.
2)Formula: Working time (hours)= Battery Capacity X Battery Voltage X 0.8X0.9/Load Power
3) For example, the battery of 12V 60AH is supplied to a 220V 100W bulb.
The working time is = 12(V) X 60(AH) X 0.8 X 0.9/100(W)=5.18(hours)
( Note: 0.8 is battery discharge coefficient, 0.9 is inverter conversion efficiency)
What Size Power Inverter Do I Need?
The size you choose depends on the watts (or amps) of what you want to run (find the power consumption by referring to the specification plate on the appliance or tool). We recommend you buy a larger model than you think you'll need (at least 10% to 20% more than your largest load).
Logistics information
Our products are located in Hong Kong, China, and the logistics speed depends on your specific location. According to our experience, it usually takes about 15-20 days of transportation time
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How to choose the correct size:
Step 1 Please measure your foot length carefully.
Step 2 Please choose the correct size according to your foot length and chinese size.
For example, If your foot length is 255 mm , you should choose the size 8.
