Rui P
New member
- Joined
- Aug 31, 2017
- Messages
- 12
Given my lack of real world DYI powerwall experience, 3 weeks ago I started full retail (sorry!) with my solar setup:
Before continuing the retail-way (that is, splashing money in expanding the BYD battery), I want to give the DYI a chance, when increasing my storage capacity to ~10kWh!
Can you please point out any red signs or shortcomings in the following plan?
Material:
Connection diagram.
Like this: http://evwest.com/support/EV West Off Grid Back Up.pdf
Questions:
Thanks!!
- 6x270W Jinko solar panels
- Victron SmartSolar MPPT 250/60
- Victron Multiplus II 48/3000/35-32 hybrid inverter
- Venus GX for system monitoring
- BYD B-Box 2.5kWh LiFePo4 battery
Before continuing the retail-way (that is, splashing money in expanding the BYD battery), I want to give the DYI a chance, when increasing my storage capacity to ~10kWh!
Can you please point out any red signs or shortcomings in the following plan?
Material:
- 2 x 5,3KWH TESLA MODULE 6S74P. I would really prefer to connect them in series, so that my MPPT has headroom to install additional PV panels (its rated 60A => 1720W@24V and 3440W@48V)
- Victron BMV-712 battery monitor
- Cabling and fuses
Connection diagram.
Like this: http://evwest.com/support/EV West Off Grid Back Up.pdf
Questions:
- Will it be stupid not to have a BMS, if I connect the 2 modules in series?
If so, would it be less stupid not to have a BMS if I connect the modules in parallel?
By connecting in parallel and staying at 24V,I would lose the MPPT headroom for doubling the current number of solar panels (6x270Wto 12x270W). - Is there any way to have the BYD and the DIY PW connected at the same time to my inverter/MPPT? Or would I need to add a second Multiplus II inverter/charger?
I can also part ways with the BYD, and end up only with the DIY PW. - Using the BMV-712 battery monitor, will I still see a nice SoC % indicator throughout my Victron management software, like I see now? Would it be reliable, or not so much?
- Any other mistakes, shortcomings, warnings?
Thanks!!