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Notes/2026-01-25 1428 Home and van battery upgrades.md

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+---
+category:
+  - "[[Journal]]"
+type:
+  - "[[Log]]"
+title: Home and van battery upgrades
+created: 2026-01-25T14:28:52
+date: 2026-01-25
+tags:
+  - research
+---
+So my general plan for increasing the capacity of the house battery and also being able to use that in the van while camping.
+
+- House side
+	- EcoFlow STREAM Microinverter
+		- £99
+		- MPPT range
+			- 16-60v dc
+		- Start-up voltage
+			- 20v
+	- Batteries
+		- 12v, minimum of 2 to achieve MPPT start-up voltage
+			- 12v 100 Ah = 1.3 kWh @ £160 = £125 / kWh (frogstar)
+			- 12v 280 Ah = 3.6 kWh @ £360 = £100 / kWh (eco-worthy)
+			- 12v 314 Ah = 4.2 kWh @ £450 = £107 / kWh (frogstar)
+			- 12v 460 Ah = 5.9 kWh @ £600 = £101 / kWh (frogstar)
+	- Charger
+		- This maybe the limiting factor here, how much kW over cheap rate
+			- 24v 40A = ~1.0 kW @ £135 (frogstar) = 5.0 kWh (in 5 hrs)
+			- 48v 35A = ~1.9 kW @ £150 (frogstar) = 9.5 kWh (in 5 hrs)
+- Van side
+	- renology mppt dc-dc charge controller 50A @ ~£200
+	- charge the ecoflow off van service battery (will be slow, but constant)
+
+@ 2 x 280 Ah batteries (7.2 kWh capacity)
+£1,155 total