how many amps is it drawing .im not trying to be pedantic just like to know my be I'm missing some thing.
If we look at actual amp use of the heater it works out at just over half an amp to get it fired up , and the same to shut it down .
If you where to run the heater at full power after start up it will use maximum of 3 amps per hour .
I run mine at full power , heater and pump combined giving 60c water at 2LPM works out at 6 amps per hour , I normally get through 35 amps all day ( 6 hours )
I use a 105 amp Numax , so only use 30% of the charge each day , I do fully bench charge it every day