Diesel Heater for Back-up heat during long grid failures?

Xringer · 12-21-21, 04:20 PM

I wonder if I should stick a tiny volt meter on top of that battery, or buy one of those fancy Battery Monitor Meters from Amazon?
Maybe instead of looking at voltage and guessing, read the actual Ah used?
Like this: https://www.amazon.com/dp/B013PKYILS/
Or this: https://www.amazon.com/dp/B07FN3VXH4/
Anyone used one of these before?

I've inserted a 70A breaker in the + side, so the battery can be cut completely off from the load of the meter and the heater's controller standby current draw.

12-21-21, 04:20 PM	#11
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	How many watthours remain? :) I wonder if I should stick a tiny volt meter on top of that battery, or buy one of those fancy Battery Monitor Meters from Amazon? Maybe instead of looking at voltage and guessing, read the actual Ah used? Like this: https://www.amazon.com/dp/B013PKYILS/ Or this: https://www.amazon.com/dp/B07FN3VXH4/ Anyone used one of these before? I've inserted a 70A breaker in the + side, so the battery can be cut completely off from the load of the meter and the heater's controller standby current draw. __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..