Sanwizard
Solar Wizard
- Joined
- Feb 2, 2021
- Messages
- 2,714
I recently purchased an MPP LV6548 for my present home to get started with solar. I also purchased 16 x 330W Q-cell panels, and 32 x Lishen 272Ah batteries. I also started building a ground mount for the panels. All was looking great, but then my Daughter had a baby, and now the wife wants to move to South Carolina. Plans change i guess. In any event, I just bought a house down there (currently live on Long Island), and it happens to already be grid tied with 25 LG 250w panels connected to 2 x SMA sunny boy 6K inverters.
My quandry is I want to keep the MPP Inverter, panels, and battery, but am wondering how to integrate the DC system with the AC based Sunny Boys.
I want to use the MPP as battery backup in case the grid goes down.
Does anyone have any experience or advice on how to get the best of both systems? I am thinking I could always use an AC connection from the grid tie system as the AC input to the LV6548, and ground mount my 16 Qcells as a secondary system with transfer switch to a sub panel for critical loads, but that leaves the 25 LG panels as useless when out outage occurs.
My other thought was to just buy another MPP LV6548 and simply replace the SMA's with the MPP's, and get off grid tie altogether, but that also seems wasteful.
Any Ideas or experience to share with battery backup for grid tied systems would be very welcome. Thanks in advance!
My quandry is I want to keep the MPP Inverter, panels, and battery, but am wondering how to integrate the DC system with the AC based Sunny Boys.
I want to use the MPP as battery backup in case the grid goes down.
Does anyone have any experience or advice on how to get the best of both systems? I am thinking I could always use an AC connection from the grid tie system as the AC input to the LV6548, and ground mount my 16 Qcells as a secondary system with transfer switch to a sub panel for critical loads, but that leaves the 25 LG panels as useless when out outage occurs.
My other thought was to just buy another MPP LV6548 and simply replace the SMA's with the MPP's, and get off grid tie altogether, but that also seems wasteful.
Any Ideas or experience to share with battery backup for grid tied systems would be very welcome. Thanks in advance!