Toggle navigation
0
  • Sign In / Register
  • Logout
  • Home
  • Solar Kit Guide
  • My Account
  • About Us
  • Contact Us
  • Solar
  • Wind
  • Energy Storage
  • Wireless
  • Building
Solar
Wind
Energy Storage
Wireless
Building
Shopping Cart
Sign In
PersonMy Account
  • My Account
  • My Projects
  • Purchased Items
  • My Profile
  • My Contributions
  • My Questions
  • Settings
  • Billing
  • Addresses
  • MegaWatt Membership
  • Referral Program
  • Rewards Program
  • Logout

Renvu

  • All
  • Solar
  • Wind
  • Energy Storage
  • Wireless
  • Building
Magnifying Glass
ABOUT US SUPPORT
Register For Prices
Home > Newest Products: Solar > Learn > Introduction To Solar > 

Combining Microinverters On One String

Michele Ladd 5/3/2017


What is the maximum number of Enphase M215 and S280s that fit on one string?


Visitor: I want to expand an existing install that I have that has Enphase M215 inverters (9 on a brand), I wanted to add some S280s' but wanted to know what the maximum qty of S280s is when added to the M215s? 

Michele | RENVU: The maximum S280's and M215 on one string...that is a good question.
 


Richard strange: I know with just M215s its 17
 but the s280's say 14 


Michele: The scoop is the Amperage of each string is maximized at 80% of 20A (= 16A)
. 80% --> 20% reduction for a safety factor. 20A for the PV breaker that lands in the main panel and the max rating of the Enphase microinverters. (Note: Darfon microinverters have a 30A maximum.)

 

Each S280 microinverter has a Nominal Output Current @ 240V 1.13A, thus 14 units can be added to a string reaching an Amperage of 15.82A. Likewise each M215 has a Nominal Output Current @ 240V 0.9A, thus 17 units can be added to a string reaching an Amperage of 15.3A.

 

Following if there is a string of 12 M215’s this makes 10.8A. There is 6 A available to be utilized by future S280’s. In this example you could add 4 s280’s to the string. The ending amperage would be 15.32A.

Downloads

Comments

Your comment will appear once it has been approved by the RENVU team.

Add A Comment

You must Login / Register to post a comment.

Related Items

  • Home
  • Terms & Conditions
  • Privacy Policy
  • Payment Methods
  • Shipping Policy
  • Careers
  • Contact Us
  • Facebook
  • Twitter
  • LinkedIn
  • YouTube

Copyright © 2021 Renvu - All Rights Reserved