My goals as stated in the beginning of this thread are:
- Shift loads so that all my solar production gets credited at the Peak Rate.
- Have a backup in the case of a power outage.
- AC couple the Outback inverter to my Grid tied system so that during a power outage the additional capacity if that system can supplement my back up.
A generator won't help me much to shift loads and leverage my existing grid tie system.
- Shift loads so that all my solar production gets credited at the Peak Rate.
- Have a backup in the case of a power outage.
- AC couple the Outback inverter to my Grid tied system so that during a power outage the additional capacity if that system can supplement my back up.
A generator won't help me much to shift loads and leverage my existing grid tie system.
1) is a money issue. This system will not save you money due to battery cost.
2) and 3) are for backup power and your needs will be better served by a generator. (That's why pretty much every off-grid system has a generator; it's the reliable backup for the less reliable solar system.)
I have a feeling that you just really, really want to build a solar battery system, even if it isn't cost effective. If so, that's fine - it's your money. But let's state that up front.
I have picked a voltage parameter based on the charge curve of my battery. I pick that voltage to avoid the knee of the curve. I do not want to fully charge my Lithium batteries. That strategy should lengthen their life. My BMS allows me to tell the charger to turn off when the Amperage in the Constant Voltage stage reaches a specific value.
I don't need a FlexNet because all that is integrated in the Skybox.
I don't have any interest in how SimpliPhi or LG communicate with the Skybox. My comment was trying to understand your original statement, "There aren't many lithium chemistry batteries yet that work with the Skybox." You have still not answered my question about what you mean by that statement. Any examples? My belief, and Outback seems to agree, is that the Skybox will work with any chemistry.
The chemistry itself doesn't matter. The fact that lithium chemistries need BMSes is what matters. If people had sodium-sulfur batteries that needed a BMS the same comment would apply.
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