[RE-wrenches] Large off-grid inverter/storage

[Starlight Solar Power Systems]

Hi Andrew,

Any phrase that includes “per hour” while describing power use, generation or storage in a RE system is probably a misnomer. Think about it: you could just as well say 25kW per second or per month. That’s because kW is a term that describes a rate or power, not a quantity of energy used or stored; kWh defines that. 

In our retail store I have heard this term hundreds of times. While I am describing the difference between Watts and Watt-Hours, which is typically the source of  confusion, I ask, “Would you say that your car has a 200HP “per hour” engine?” No, you would just say 200HP because you are describing power.

So, if you meant the combined loads require 25kW to operate, use that number to determine inverter or generator sizes. If you are describing 25kWh of energy use or storage, use that to determine power production and battery bank size.

To your question: I am a fan of using Li-ion batteries for the long life, weight and space savings, no maintenance, much higher charge rates, fastest recharging, and the 40% reduction in the PV system size compared to LA storage. Plus you get battery protection and monitoring included. Since you never have to fully charge them, for offgrid use, the advantages are huge. For people making $$$$ growing weeds, buy the best. Contact me off the list if you would like more understanding about Li battery storage. 

Larry Crutcher
Starlight Solar Power Systems
larry at starlightsolar.com


On Sep 6, 2019, at 9:32 AM, Andrew <andrew at greenwired.com> wrote:
Yeah these are for industrial cannabis operations that are starting to spring up due to legalization..36” industrial greenhouse fans, pre vegetation lighting, supplemental light and dehumidifiers… why they still want to do it in the middle of the boonies with now power is beyond me..
 
Andrew Perkins
Greenwired
P: 707-923-2001 ext. 100
1150 #1 Evergreen Rd
Redway, CA 95560


On Sep 5, 2019, at 2:15 PM, Andrew <andrew at greenwired.com> wrote:

Hey Everyone,
                I have been recently been getting more and more inquiries for some quite large off-grid sytems(25kw per hour) and seeing what you guys have for suggestions on bigger inverters and storage systems?  I could do 2 triple stack Schneider’s and a bunch of HUPS industrial batteries but it all just takes up so much space and I know there are some other companies out there with package units. Thoughts? 
 
Andrew Perkins
Greenwired
P: 707-923-2001 ext. 100
1150 #1 Evergreen Rd
Redway, CA 95560

 

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