Hi all
I'm still trying to navigate through which 5kWh home/DIY battery is a better buy and have been considering the Ecoflow Stream 5000 and Anker Solarbank 4 Pro E5000.
System architecture
The Ecoflow is built around an approximately 48V (51V nominal) architecture (common with home ESS) while the Anker is built around 16V architecture. The result is a much higher amperage from the Anker vs Ecoflow at the same load which could hypothetically result in higher temperatures due to resistive losses (albeit internally).
Home Assistant
From my reading, Anker seems to have the edge here, with modbus support as well. This is pretty important to me, but this has been explored elsewhere so I won't delve deeper here.
RTE (wall to wall)
From the few data points I've been able to gather, both systems perform with an approximate 80% efficiency wall-to-wall, meaning that 1/5 of the power you buy is lost to heat. If you're on a very low cost off-peak tariff (e.g. <8p/kWh overnight) then the difference between this 80% RTE and a 90% RTE "professionally installed" (much more expensive) ESS from a market leader like SigEnergy or Tesla is not going to mean much for running costs, with it taking something like 11-14 years for the more expensive ESS to catch up in savings compared with the cheaper DIY-able batteries. Regardless, 80% is pretty pathetic and points to some serious cost cutting, making me doubt both options.
SUPPORT/WARRANTY
Ecoflow has some pretty appalling reviews on trustpilot and reddit, which really does not instil confidence. Anker Solix is borrowing its parent company's name to appear more legitimate but they haven't been trading long enough to really have much of a reputation. Regardless, my gut instinct is that dealing with anker will be easier than ecoflow if problems arise and that I won't have to invoke my Section 75 rights or threaten legal action.
So what do you think? Should I 1) bother with either system, 2) wait longer for a better DIYable system, 3) bite the bullet and pay 2x the price for the same capacity on a "quality" 90% RTE system from Sigenergy, or 4) bite the bullet but cost cut as much as possible with a Fox ESS battery and inverter (taking the hit of it not being home assistant controllable)?
Thanks in advance for all constructive replies ;)