totalconfusion
New Member
- Joined
- Dec 24, 2020
- Messages
- 62
Apologies if this is the wrong section for this post. I'm after a hand sizing up a charge controller.
These are the panels I'm looking at purchasing:
320w
lsc = 9.11
voc = 44.85
My configuration will be 2S2P and if I go with the bigger charge controller, this would eventually grow to 3S3P
These are the charge controllers I'm looking at:
Victron SmartSolar MPPT 100/20 ($200)
and
Victron SmartSolar MPPT 150/35 ($520)
I have three concerns:
1. The first is not having enough safety margin running 2S2P with the much cheaper 100/20 charge controller.
2. What is "nominal PV power" What is this and is it of any concern? Or should I just be calculating off lsc and voc?
3. What is "rated charge current". Is this the current with which the battery is charged? If I went with the 100/20 MPPT, will I experience much slower battery charging than the 150/35? What are the practical limitations for charging batteries? I was thinking of running a couple of 200AH deep cycle lead acid batteries in parallel for 400AH at 12v but would consider running a 24v system.
Thanks for reading and I really appreciate your help!
These are the panels I'm looking at purchasing:
320w
lsc = 9.11
voc = 44.85
My configuration will be 2S2P and if I go with the bigger charge controller, this would eventually grow to 3S3P
These are the charge controllers I'm looking at:
Victron SmartSolar MPPT 100/20 ($200)
and
Victron SmartSolar MPPT 150/35 ($520)
I have three concerns:
1. The first is not having enough safety margin running 2S2P with the much cheaper 100/20 charge controller.
2. What is "nominal PV power" What is this and is it of any concern? Or should I just be calculating off lsc and voc?
3. What is "rated charge current". Is this the current with which the battery is charged? If I went with the 100/20 MPPT, will I experience much slower battery charging than the 150/35? What are the practical limitations for charging batteries? I was thinking of running a couple of 200AH deep cycle lead acid batteries in parallel for 400AH at 12v but would consider running a 24v system.
Thanks for reading and I really appreciate your help!