I originally bought my Delta Pro Ultra with the single battery, worked great is able to power my entire home for about 4 to 5 hours during peak times. That includes kids playing their games, washer/dryer going, electric stove, house heating and lights throughout. Hope that explains why it last 4-5 hours. I bought a second battery, love how it stacks up and no cable sticking out wasting space. My run time has doubled eliminating the anxiety. I do plan to add a third battery at some point when prices drop a bit. Here is a concern I have, I noticed the battery closest to the inverter seems to run hotter than the one below. About 10 degrees warmer. I switched the batteries around to ensure that it wasn’t the battery and got the same results. My concern is when the climate changes and gets warmer, will I have overheating issues making my Delta Pro Ultra useless during the summer? My garage could get up to 98 degrees during the summer, that means my batteries can overheat. I truly hope this issue can be resolved with a software upgrade.
I added an additional DPUB to my DPU setup with SHP2. It is heavy but still portable, even for a single person. I can't speak of longevity, too early for that. KwH seems accurate based on current charge and discharge cycles (I only charge to 90%). Flat cable is a big plus for space saving and make for a clean install. Conditioning is nice in winter, not sure yet how they are going to behave in summer. Happy to provide an update after 6 months as I use them daily for TOU optimization.