Now what did I do wrong....

[Gdwats]

I should probably know better by now, but can you use this 200 watt panel
(https://www.acosolar.com/acopower-20...saAqsrEALw_wcB) . Amps and volts look ok.
in place of two 100 watt panels in an array? It seems it would be dummied down to a 100w?
I am told they are half the price if you get big ones. And I do need more in a bit for 800W total. Should have have bought 250s to start(50W free)

[sensij]

I should probably know better by now, but can you use this 200 watt panel
(https://www.acosolar.com/acopower-20...saAqsrEALw_wcB) . Amps and volts look ok.
in place of two 100 watt panels in an array? It seems it would be dummied down to a 100w?
I am told they are half the price if you get big ones. And I do need more in a bit for 800W total. Should have have bought 250s to start(50W free)

Yes, that is a 24 V panel, with 72 cells, and will be close to electrically equivalent to two 12 V, 36 cell, 100 W panels in series. Also, yes, buying 60 cell or 72 cell panels tends to be much less expensive per W than buying the 12 V panels you've used so far.

Please don't lose track of the need for overcurrent protection in your system. Every connection that can trace directly back to the battery needs to be fused or protected with a breaker. The MRBF dual terminal blocks sold by Blue Sea Systems that mount directly to the battery terminal posts are a nice option when you are only connecting a charge controller and inverter. They can also be a good choice when you limit yourself to just two connections to the battery... one from the charge controller, and one to a load distribution block (which might have additional fusing for each load).

How do you plan to wire in both inverters? Are you using some kind of distribution block?

Also, is the system going to be floating, or grounded? Have you sketched out a drawing or schematic yet?

[Gdwats]

Yes, that is a 24 V panel, with 72 cells, and will be close to electrically equivalent to two 12 V, 36 cell, 100 W panels in series. Also, yes, buying 60 cell or 72 cell panels tends to be much less expensive per W than buying the 12 V panels you've used so far.

Please don't lose track of the need for overcurrent protection in your system. Every connection that can trace directly back to the battery needs to be fused or protected with a breaker. The MRBF dual terminal blocks sold by Blue Sea Systems that mount directly to the battery terminal posts are a nice option when you are only connecting a charge controller and inverter. They can also be a good choice when you limit yourself to just two connections to the battery... one from the charge controller, and one to a load distribution block (which might have additional fusing for each load).

How do you plan to wire in both inverters? Are you using some kind of distribution block?

Also, is the system going to be floating, or grounded? Have you sketched out a drawing or schematic yet?

I'll get a 200W next time, thanks.

fusing/breaker protection, I have none yet and am kinda clueless there other than making sure I don't approach any limits. I am starting to get some powered going though. I will look into that BSS unit.

I was thinking I could hook both a 1500W and a 300W to the same posts of the Fla batteries, or the BSS unit you mentioned, no?

what is a load distribution block?
thanks

[sensij]

You have a 1500 W continuous, 3000 W surge inverter, 24 V battery. That is 62.5 A continuous, 125 A surge (@100% inverter efficiency). Samlex actually includes a table and notes explaining their OCPD recommendations.

When you know what size wire is being used to hook up the 1500 W inverter, you can make a better call on what size fuse/breaker you'll need. Note that Samlex's recommendations are based on conductors with an insulation rating of 105 deg C, using ISO 10133 ampacity.

You'll need to go through the exercise for each of the components that is connected to the battery. The 300 W inverter can use finer wire and a smaller fuse, while the charge controller needs a 40 A fuse for the 8 AWG

samlex pst1500.JPG

samlex notes.JPG

[Mike90250]

Connecting both an inverter and a charge controller to a battery, is a excellent application for the blue seas dual MRBF fuse holder
40A on one post, 300A on another.
Fuses sold seperatly

https://www.bluesea.com/products/2151/Dual_MRBF_Terminal_Fuse_Block_-_30_to_300A

[Gdwats]

Thanks all! Just great info. I imagine that chart is in my pst1500 manual, but it helps a lot to have someone point out it's importance. I tend to brush over manuals too quickly. That blue unit looks simple enough, thanks again.

[Gdwats]

Looks like 82.5% from the panels, is that good or bad?:
3sx3s arrays(strings?) of 100W for 600W tot.
Noon: 45V at panels x 11A = 495W. 495/600=0.825 on the panel side of controller. 16A going to batteries @24V when bank is at 26V full(ish).