How long can I run the power inverter on my battery?

12 Volt Battery Chart Typical Load Battery Size Inverter BCI Group Size 22NF 24 27 8D Dual 8D Output Power Reserve Capacity 90 Min 140 Min 180 Min 400 Min 900 Min Watts Amps-Hrs 50 75 100 200 400 50 Stereo System Operating Time 9 HRS 14 HRS 20 HRS 40 HRS 80 HRS 100 27' Color TV Operating Time 4 HRS 6 HRS 10 HRS 20 HRS 40 HRS 200 Computer System Operating Time 2 HRS 3 HRS 4.5 HRS 10 HRS 20 HRS 300 Blender Operating Time 1.3 HRS 2.2 HRS 3 HRS 6 HRS 12 HRS 600 Small Coffee Machine Operating Time N.R. N.R. 1 HRS 2.5 HRS 6 HRS 800 Small Microwave Operating Time N.R. N.R. N.R. 1.5 HRS 4 HRS 1000 Toaster Operating Time N.R. N.R. N.R. 1 HRS 3 HRS 1500 Full Size Microwave Operating Time N.R. N.R. N.R. 0.5 HRS 2 HRS 2500 Hair Dryer Operating Time N.R. N.R. N.R. 0.2 HRS 0.8 HRS

 

Tip: Deep cycle (marine) batteries generally have the highest reserve ratings. They are also capable of withstanding repeated drains of power and recharging.

Tip: Engine start batteries should not be discharged below 90% charged state, and marine deep cycle batteries should not be discharged below 50% charged state. Doing so will shorten the life of the battery based on most battery manufacturers recommendations.

Note: If you intend to use power tools for commercial use, or any load of 200W for more than 1 hour regularly (between battery recharging) we recommend installing an auxiliary battery to provide power to the inverter. This battery should be a deep cycle type and sized to meet your run time expectations with the engine off. The auxiliary battery should be connected to the alternator through an isolator module to prevent the inverter from discharging the engine start battery when the engine is off.

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