Inverter too small?
I have a 1000w cobra inverter i bought to power a small 5 cubic foot freezer that pulls 4 amps when running. The battery i use for the inverter is 105 amp marine deep cycle group 29.The inverter is co...
Forum Discussion
Do battery manufacturers use the same standards (allowable voltage drop and same load) to test batteries in order to establish amp-hour ratings.
My understanding is that amp-hour ratings can be manipulated to achieve higher ratings by allowing for a greater drop in voltage during the test to establish the rating. If one manufacturer uses a 12.3V limit while another uses an 11.8V limit they may call them both 105 amp-hour batteries but you're not going to get the same performance. I would think there is an industry standard for setting amp-hour ratings but I'm not aware of it.
The amperage used by the manufacturer to establish the amp-hour rating can also have an affect. You can establish a longer amp-hour rating by drawing a lower current over a longer time.
My understanding is that amp-hour ratings can be manipulated to achieve higher ratings by allowing for a greater drop in voltage during the test to establish the rating. If one manufacturer uses a 12.3V limit while another uses an 11.8V limit they may call them both 105 amp-hour batteries but you're not going to get the same performance. I would think there is an industry standard for setting amp-hour ratings but I'm not aware of it.
The amperage used by the manufacturer to establish the amp-hour rating can also have an affect. You can establish a longer amp-hour rating by drawing a lower current over a longer time.
