diff --git a/packages/web/components/ScenarioWizard.tsx b/packages/web/components/ScenarioWizard.tsx
index 8db3662..3d705a5 100644
--- a/packages/web/components/ScenarioWizard.tsx
+++ b/packages/web/components/ScenarioWizard.tsx
@@ -28,8 +28,9 @@ interface WizardState {
   // Solar
   solar_enabled: boolean;
   solar_location: string;
-  solar_dc_mwp: number;
   solar_ac_mw: number;
+  solar_dc_ac_ratio: number;
+  solar_dc_mwp: number;
   // Wind
   wind_enabled: boolean;
   wind_location: string;
@@ -49,8 +50,9 @@ const DEFAULT_STATE: WizardState = {
   cod_date: "2027-04-01",
   solar_enabled: true,
   solar_location: "RJ",
-  solar_dc_mwp: 100,
-  solar_ac_mw: 80,
+  solar_ac_mw: 100,
+  solar_dc_ac_ratio: 1.4,
+  solar_dc_mwp: 140,
   wind_enabled: false,
   wind_location: "RJ",
   wind_mw: 50,
@@ -83,21 +85,29 @@ function Input({
   type = "text",
   step,
   min,
+  max,
+  readOnly,
+  className = "",
 }: {
   value: string | number;
   onChange: (v: string) => void;
   type?: string;
   step?: number;
   min?: number;
+  max?: number;
+  readOnly?: boolean;
+  className?: string;
 }) {
   return (
     <input
       type={type}
       step={step}
       min={min}
+      max={max}
+      readOnly={readOnly}
       value={value}
       onChange={(e) => onChange(e.target.value)}
-      className="border rounded px-3 py-1.5 text-sm focus:outline-none focus:ring-2 focus:ring-primary bg-background"
+      className={`border rounded px-3 py-1.5 text-sm focus:outline-none focus:ring-2 focus:ring-primary bg-background ${readOnly ? "bg-muted cursor-default" : ""} ${className}`}
     />
   );
 }
@@ -203,15 +213,6 @@ function StepSolar({
               options={LOCATION_OPTIONS}
             />
           </Field>
-          <Field label="DC Capacity (MWp)">
-            <Input
-              type="number"
-              value={state.solar_dc_mwp}
-              step={5}
-              min={1}
-              onChange={(v) => set("solar_dc_mwp", Number(v))}
-            />
-          </Field>
           <Field label="AC Capacity (MW)">
             <Input
               type="number"
@@ -221,6 +222,31 @@ function StepSolar({
               onChange={(v) => set("solar_ac_mw", Number(v))}
             />
           </Field>
+          <Field label="DC:AC Ratio">
+            <Input
+              type="number"
+              value={state.solar_dc_ac_ratio}
+              step={0.05}
+              min={1.0}
+              max={1.8}
+              onChange={(v) => {
+                const ratio = Number(v);
+                set("solar_dc_ac_ratio", ratio);
+                set("solar_dc_mwp", parseFloat((state.solar_ac_mw * ratio).toFixed(3)));
+              }}
+            />
+          </Field>
+          <Field label="DC Capacity (MWp)">
+            <Input
+              type="number"
+              value={state.solar_dc_mwp}
+              step={5}
+              min={1}
+              readOnly
+              className="bg-muted cursor-default"
+              onChange={() => {}}
+            />
+          </Field>
         </>
       )}
     </div>
@@ -365,8 +391,7 @@ function StepReview({ state }: { state: WizardState }) {
           <>
             <dt className="text-muted-foreground">Solar</dt>
             <dd>
-              {state.solar_dc_mwp} MWp DC / {state.solar_ac_mw} MW AC (
-              {state.solar_location})
+              {state.solar_ac_mw} MW AC / {state.solar_dc_mwp} MWp DC ({state.solar_location}, {state.solar_dc_ac_ratio}x)
             </dd>
           </>
         )}
@@ -438,8 +463,9 @@ export function ScenarioWizard({ onSubmit, onCancel }: ScenarioWizardProps) {
       solar: state.solar_enabled
         ? {
             location_id: state.solar_location,
-            capacity_dc_mwp: state.solar_dc_mwp,
             capacity_ac_mw: state.solar_ac_mw,
+            dc_ac_ratio: state.solar_dc_ac_ratio,
+            capacity_dc_mwp: state.solar_dc_mwp,
           }
         : null,
       wind: state.wind_enabled