muttmaster
Senior Member
- Joined
- Feb 28, 2014
- Messages
- 174
Knowing my propane was approaching low level and decided to test using the Dometic 2.7 cf 3 way on DC. As FWC does not recommend it unless you are driving and charging battery via alternator. Actually, they don’t recommend that either due to charging wiring issues and high amp usage of these fridge. I just added 120 watts semi flex to the factory installed 160 for this test.
At 9:45 am, ZAmp controller shows 13.6 v at float. 100% charged battery when I switched to DC mode. In 30 minutes, I got 12.7 v and 11.0 A charge current and 11.2 ah. Still 100%.
At one hour on DC at 10:45, ZAmp shows the battery out of 100%, but does not show %. At 12.6 v, 11.6 A, 16.4 ah charged capacity.
So my question is how long can the 280 watts keep my two 75 ah AGM charged enough to run the Fridge in DC mode? Seems worthwhile test before I run out of propane. Also, why FWC didn’t install heavier gauge wires so I can charge batteries via alternator or solar more efficiently.
At 9:45 am, ZAmp controller shows 13.6 v at float. 100% charged battery when I switched to DC mode. In 30 minutes, I got 12.7 v and 11.0 A charge current and 11.2 ah. Still 100%.
At one hour on DC at 10:45, ZAmp shows the battery out of 100%, but does not show %. At 12.6 v, 11.6 A, 16.4 ah charged capacity.
So my question is how long can the 280 watts keep my two 75 ah AGM charged enough to run the Fridge in DC mode? Seems worthwhile test before I run out of propane. Also, why FWC didn’t install heavier gauge wires so I can charge batteries via alternator or solar more efficiently.