Over zealous non technical swimming in too many options!
2 Weeks into research I've over spent my budget. Not that I'm upset with that - I feel like it's been a good investment that will pay off, but now I'm at a point where I have to purchase a solar panel ever 2 weeks to match the battery back I stumbled on.
First off, I bought a 400W Off Grid System (4) 100W Solar Panels w/ 1500W Inverter from Eco systems for $798. Some of the particulars:
|Open Circuit Voltage(Voc)||21.6V|
|Short circuit current (Isc)||6.11A|
|Temperate coefficient of Isc||(010+/- 0.01 )%/ ℃|
|Temperate coefficient of Voc||- (0.38 +/-0.01 )%/ ℃|
|Temperate coefficient of power Voc||-0.47%/℃|
|Temperature range||-40℃to +80℃|
|Frame||Heavy duty aluminum|
|Guarantee of power||90% with in 10 years 80% with in 25 years|
|Kind of glass and its thickness||Low Iron, high transparency tempered glass of 3.2mm|
|SLA Battery Voltage||12V|
15A Solar Charge Controller Regulator with timer and light sensor
● Timer control for saving energy
● 12/24V system automatic detectable
● PWM charging available
● With small self consumption, 2mA at 12V system
● 3-stage charging algorithm: impulse, bulk and float
● Wrong battery pole connection protection
● Light sensor adjustable
● Adjust the timer and light sensor
● Lightning protection
My thoughts? I could probably run one window AC every 3 days if I got the right set of batteries. AND, I could expand to 800W really really easily. So, I really just started looking for about 400AH of battery power, not really knowing what I needed. Well, I was about to buy some brand new BMW deep cell batteries (knowing full well they weren't the perfect solution - but they were $500 for 5 of them), but a few hours before I was to go, I ran across a crazy good deal. I ended up with 6 of these for $550:
GNB Marathon M12V155FT General Specifications:
Voltage: 12 V
8 hr To 1.75 VPC @ 25ºC: 155 Ah
10 hr To 1.80 VPC @ 20ºC: 150 Ah
Length: 559 mm, 22.00 in
Width: 124 mm, 4.90 in
Height: 283 mm, 11.15 in
Nominal Weight: 53.8 kg, 119 lbs
Short Circuit Current: 3,883 A
Internal Resistance: 3.0 mΩ
Now, I have too much battery and I haven't even set the system up yet (It'll give me something to do between Good Friday and Easter!.
I'm essentially way over my battery need, right? I plan to add a 100W panel every 2 weeks until I max out my current system. I may add a wind turbine for the kids afterwards, but honestly - I'm in a fringe wind area and its just for fun for the kids (guessing of the 300W advertised I'd only pull in 75 - 100. Honestly - I'm getting a battery bank monitor because my balance is so out of wack, I feel like I lose complete situation awareness.
So, My plan is to set up with system using 6 gage wire (is that enough?), and run all 6 batteries in parallel (unless you all suggest I shouldn't!). I've watched more youtube in the last 3 weeks - I know what it's like to be my 13 year old son now! Anyhow, I've read a bunch of posts over here (this forum helped me decide to partially bury my battery bank against the house), and I thought "What could it hurt to post". I'm an ol' jarhead that couldn't spell solar a few weeks ago, and am looking forward to making a few mistakes, but ultimately getting my AC costs down.
Have a great evening!