Greg, Now that you say 270 watt panels Id install at least three but 4 to 6 gives you more energy harvest ability HOWEVER the answer still depends on your energy requirements ?????????
FWIW I think Renogy is a decent brand. Some gents like Mono but mine are Poly and work fine.
On a solar charge controller, don't forget in addition to the input voltage the charging capacity needs to be adequate. If you had lets use four 270 watt panels and were charging at 13 volts that's 83 charging amps meaning a 100 amp controller
When connecting multiple panels parallel means less of a problem when partial shading is present but in series there's more voltage so less current flows down to the controller. My three 245 watt 24 volt panels are all wired in parallel
I like AGM because there's less venting concern of corrosive potentially explosive gasses then in conventional flooded lead acid YOU CHOSE WISELY
Don't forget you need a good (Id use Pure Sine Wave PSW versus the cheaper Modified Sine Wave MSW) Inverter and smart 3/4 stage charger but as I mentioned better yet a combination Inverter/Charger like Magnum makes
John T Hope to meet up on the road some day. Ive been dry camping the last 2 weeks and will the next few and my batteries stay charged fine yayyyyyyyyyyyy
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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