3 ms·

Thanks for the details. How do you scale this up to power the whole house? On the low end I would imagine you need 30 kWh worth, along with the appropriate equi

Thanks for the details. How do you scale this up to power the whole house? On the low end I would imagine you need 30 kWh worth, along with the appropriate equipment (5 kW inverter, cabling, enclosures) to tie it all together into a single system, manage charging, connect it to your home’s circuit safely, and so on. Do you buy off the shelf solutions for all that or pay for some kind of ongoing service or DIY?

sponaugle 5y ago
The scale is based on two things - storage capacity, and power capacity. Storage is the kwh of storage, which will determine how long you can run off-grid. The power capacity is the peak output power of the system when off-grid, and is usually limited by the inverters. I am using the Enphase Encharge system, in which each battery unit also includes grid-creation capable micro-inverters. They are integrated into the same boxes, and can provide both grid offset, or grid generation. There is also a 'smart switch' that does the interconnects to the grid, and provides the autotransformer capability ( needed to have 120V split phase ). There are some more details in my house/shop build thread on garage journal: https://www.garagejournal.com/forum/threads/jeffs-mountain-side-shop-portland.409988/ https://www.garagejournal.com/forum/threads/jeffs-mountain-s...
- throwawaysea 5y ago
  Thanks for sharing - that seems like an ambitious (and expensive?) project. Are you planning to do an all-up retrospective on it (not just the backup power but the entire site and building)?