I had Escape install one of their 1500w inverters to my twin group 27 batteries. I use an Escape 90w solar panel for recharge. When I plug in and use my 400w coffee maker the batteries drop from 100% to 41% durning the coffee making cycle. Once the coffee cycle is over the batteries quickly spring back to 95% then 100%. Is this normal?
The GoPower solar regulator estimates state of charge from the voltage. When there is a heavy load on the batteries the voltage drops, then rises again once the load is off. That is why the state of charge appears to go up and down this much. This is normal.
If you want an accurate estimate of state of charge you will need a more battery monitor such as the Trimetric TM2025RV which takes into account the amp-hours in and out of your batteries.
Another solution is to just notice the state of charge on the GoPower regulator in the evening when it is dark and there are no loads on the battery. This will be a more accurate estimate of the true state of charge.
2003 Subaru Forester
2012 Toyota Highlander V6
2010 Escape 13 "Ladybug" Feb 2010
Trailer: Escape#4, 2019 Escape21 DejaView pulled by 2014 Ram Hemi/8sp
Yes, the batteries drop and rise with use, normal and when you need to check them, wait until all draws have been disconnected as well as solar charging (this means you will have to do this at night) then you plug in a voltmeter to determine your state of charge.
Sometimes life gets in the way of living......