Mr. Prowse has provided such an excellent resource that in my copying his working I hope I assemble and select everything correctly. It'll be a 24v system.
So, here's my proposal for design which is the same one as Will provides; https://www.mobile-solarpower.com/4000-watt-24v-solar-system.html
- PV panels are Trina Solar SS250P-60 (here are the spec's found from the Ebay listing;
Rated Power of each panel: 250W
The idea is to let the Sun charge early in the day with the 5 South facing panels and then later in the day with the 5 West facing panels.
Each string of 5 panels will be connected in series.
The 2 MPPT controllers- 5 panels will be connected to each controller. I'm somewhat concerned that the input voltage to each controller will be exceeded and thus destroy the controllers. I'm new to this stuff....and cautious. What are your thoughts about this?
Batteries- I'll be using a LiFePo 24v 100Ah which I intend to purchase 8- 3.2v cells on Ebay, probably, making it a 24v battery. Why 100Ah? Because that seems to be a common Amp hour for most systems. Later, if need be, I assume I can increase the Amp hours by putting adding another 24v 100Ah battery in parallel. Let me know if this is wrong.
Battery Balancer- don't remember if one is needed.
BMS- will buy 2 OverKill BMS or perhaps Victron?
No Automatic Transfer Switch- at the moment I don't need one.
Inverter- pure sine wave just like Will's design mentioned above. However, I would like to add a separate 120v breaker system to the inverter for several 15a circuits.
The remainder of the system will be as pictured in Will's 24v system (mentioned above).
Lastly, I'm concerned about Bluetooth capable equipment for several reasons;
1- Not open source
2- Don't want the equipment to be hacked, modified or disabled by a malicious actor (as they say).
3- Perhaps I can use an old cell phone with Bluetooth capability?
4- I don't want anyone else looking at the power figures generated by my system.
Conclusion- what are your ideas? Any improvements you'd suggest? I certainly want to do this setup correctly the first time.
Thank you,
Peter
So, here's my proposal for design which is the same one as Will provides; https://www.mobile-solarpower.com/4000-watt-24v-solar-system.html
- PV panels are Trina Solar SS250P-60 (here are the spec's found from the Ebay listing;
Rated Power of each panel: 250W
- Open circuit voltage (VOC): 37.6 V
- Max power voltage (VMP): 30.3 V
- Short circuit current (ISC): 8.85 A
- Max power current: 8.27 A
- Power Tolerance 0/+3%
- Maximum system voltage: 600V (UL)
- Fuse Rating: 15 A
- Frame: Anodized aluminum alloy
- Weight: 41 lbs
- Dimensions: 64.95" × 39.05" × 1.37" inches
The idea is to let the Sun charge early in the day with the 5 South facing panels and then later in the day with the 5 West facing panels.
Each string of 5 panels will be connected in series.
The 2 MPPT controllers- 5 panels will be connected to each controller. I'm somewhat concerned that the input voltage to each controller will be exceeded and thus destroy the controllers. I'm new to this stuff....and cautious. What are your thoughts about this?
Batteries- I'll be using a LiFePo 24v 100Ah which I intend to purchase 8- 3.2v cells on Ebay, probably, making it a 24v battery. Why 100Ah? Because that seems to be a common Amp hour for most systems. Later, if need be, I assume I can increase the Amp hours by putting adding another 24v 100Ah battery in parallel. Let me know if this is wrong.
Battery Balancer- don't remember if one is needed.
BMS- will buy 2 OverKill BMS or perhaps Victron?
No Automatic Transfer Switch- at the moment I don't need one.
Inverter- pure sine wave just like Will's design mentioned above. However, I would like to add a separate 120v breaker system to the inverter for several 15a circuits.
The remainder of the system will be as pictured in Will's 24v system (mentioned above).
Lastly, I'm concerned about Bluetooth capable equipment for several reasons;
1- Not open source
2- Don't want the equipment to be hacked, modified or disabled by a malicious actor (as they say).
3- Perhaps I can use an old cell phone with Bluetooth capability?
4- I don't want anyone else looking at the power figures generated by my system.
Conclusion- what are your ideas? Any improvements you'd suggest? I certainly want to do this setup correctly the first time.
Thank you,
Peter