Joe Murphy
New Member
- Joined
- Sep 6, 2022
- Messages
- 2
I am completely new to the world of solar generators. I am in the process of buying a Bluetti AC300 solar power station (which is rated at 3kW). The system can accommodate from one to four B300 batteries, with each battery having a capacity of 3kWh.
The AC300 has dual MPPT controllers (solar inputs), with each controller being rated as follows: 1200W max, Voc 12-150V, 12A max.
Bluetti offers two types of solar panel that would seem to be usable here, and I am trying to decide which of the two to go for, with the main consideration being to max out the amount of solar input:
PV350: If, for each MPPT controller, I used 3 x PV350 in series, this would give a combined output of 1050W max, being only 150W short of the max 1200W that can be handled. It would also give a combined Voc of 139.5 (46.5 x 3). My main question: Is 139.5V too close to the max allowable input voltage of 150V, considering that the Voc value can apparently increase in cold weather, and so apparently you need to allow some bit of a buffer?
PV200: Otoh, if I instead used PV200, I would be limited to a quantity of 5 in series for each MPPT controller in order to stay below the max input voltage allowed, being 150V. So, with 5 x PV200, this would give a combined output of only 1000W max, being 200W short of the max 1200W that can be handled. It would also give a combined Voc of 130.5 (26.1 x 5), which gives a slightly larger clearance from the 150V max allowable, compared with using 3 x PV350 units.
Another thought: an advantage of using PV350 units might be in having fewer panels and fewer connections to have to manage.
Any thoughts would be welcome.
The AC300 has dual MPPT controllers (solar inputs), with each controller being rated as follows: 1200W max, Voc 12-150V, 12A max.
Bluetti offers two types of solar panel that would seem to be usable here, and I am trying to decide which of the two to go for, with the main consideration being to max out the amount of solar input:
- PV350 (Pm = 350W, Voc = 46.5V, Isc = 10.8A, Vmp = 37.5V, Imp = 9.2A)
- PV200 (Pm = 200W, Voc = 26.1V, Isc = 10.3A, Vmp = 20.5V, Imp = 9.7A)
PV350: If, for each MPPT controller, I used 3 x PV350 in series, this would give a combined output of 1050W max, being only 150W short of the max 1200W that can be handled. It would also give a combined Voc of 139.5 (46.5 x 3). My main question: Is 139.5V too close to the max allowable input voltage of 150V, considering that the Voc value can apparently increase in cold weather, and so apparently you need to allow some bit of a buffer?
PV200: Otoh, if I instead used PV200, I would be limited to a quantity of 5 in series for each MPPT controller in order to stay below the max input voltage allowed, being 150V. So, with 5 x PV200, this would give a combined output of only 1000W max, being 200W short of the max 1200W that can be handled. It would also give a combined Voc of 130.5 (26.1 x 5), which gives a slightly larger clearance from the 150V max allowable, compared with using 3 x PV350 units.
Another thought: an advantage of using PV350 units might be in having fewer panels and fewer connections to have to manage.
Any thoughts would be welcome.