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--- opinion:frater_secessus:controllers_and_dollars_per_watt [2020/05/25 12:08]
frater_secessus [cost analysis of small controller / panel combinations]
+++ opinion:frater_secessus:controllers_and_dollars_per_watt [2021/06/26 14:33] (current)
frater_secessus [Morning, ideal]
@@ Line 16: / Line 16: @@
 I ran some numbers, using Renogy gear where possible:
+===== general conclusion =====
+The general pattern is that MPPT typically makes more power in absolute terms, and PWM/shunt make more power per dollar spent.
@@ Line 38: / Line 45: @@
   - 20A MPPT 200W poly/mono, **174.80W**  @ $1.65/W.  $289.
   - 20a PWM 200w poly **125.89W** @ $1.99/W.  $250.
+  - 10A MPPT 200w mono/poly, **121W** @ $2.16/W.  $261.
   - 10a MPPT 100W mono/poly **87.4W** @ $1.84/W.  $161.
   - 10a PWM 100W poly **62.94W** @ $1.82/W.  $115.
-  - 10a PWM 100w mono **59.25W** @ $1.93/W.  $115.
@@ Line 48: / Line 54: @@
   - 20A MPPT 200W poly/mono, 174.80W  @ **$1.65/W**.  $289.
   - 10a PWM 100W poly 62.94W @ **$1.82/W**.  $115.
-  - 10a MPPT mono/poly 87.4W @ **$1.84/W**.  $161.
+  - 10a MPPT 100W mono/poly 87.4W @ **$1.84/W**.  $161.
-  - 10a PWM 100w mono 59.25W @ **$1.93/W**.  $115.
+  - 10a PWM 100W mono 59.25W @ **$1.93/W**.  $115.
   - 20a PWM 200w poly 125.89W @ **$1.99/W**.  $250.
@@ Line 98: / Line 104: @@
   - 20A PWM 200w mono 154.47W @ **$1.62/W**.  $250.
   - 20A MPPT 200W mono/poly 165.27W @ **$1.75/W**.  $289.
-  - 10A MPPT 200w mono/poly **146.0W** @ $1.78/W.  $260.
+  - 10A MPPT 200w mono/poly 146.0W @ **$1.78/**W.  $260.
   - 10A MPPT 100W mono/poly 82.63W @ **$1.95/W**.  $161.

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