50 new modules!

50 new modules!

Last week I drove to Canberra to pick up 50 modules. These modules had previously been used in a HV powewall (48 modules, 96 cells in series!). Estimated remaining capacity of around 16kwh. I will be testing these in time and then rebuilding the powerwall to incorporate all the newfound modules.

Batrium Ramped targets – For CAN Enabled inverters

Batrium Ramped targets – For CAN Enabled inverters

On the 20th of December, Batrium released Watchmon toolkit 2.17.15 which includes a great new feature for inverters that support CANbus. The new feature is called ‘Ramped Targets’ and allows the charging current to be reduced at the top or bottom ends of SOC. I use this feature to bring down the max charge current…

Adding more DC Solar Part 7 – Completing the Install & Testing
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Adding more DC Solar Part 7 – Completing the Install & Testing

I started work on the system yesterday by completing the DC cabling on the lean-to. I installed the branch connectors and then cut custom lengths of cable and terminated with the required MC4 connectors. I used large zip ties to tidy up the wiring. I then went back to the wiring inside the shed. here…

Adding more DC Solar Part 6 – Mounting the inverter
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Adding more DC Solar Part 6 – Mounting the inverter

Before starting on the inverter (Victron SmartSolar 150/35) I connected the DC Cable to the rooftop isolator. This involved terminating the cable with male and female MC4 connectors. I used the correct crimp tool (Narva brand) with the #12 crimp insert. I then connected to the output of the rooftop isolator and temporarily cable tied…

Adding more DC Solar Part 3 – Testing Second Hand Panels
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Adding more DC Solar Part 3 – Testing Second Hand Panels

Before installing the panels, I wanted to make sure they were all OK. I performed two tests: Short Circuit Current – Using a current clamp to measure current. Insulation Test using a Megger Short Circuit Current This step is rather easy. Simple connect the positive and negative plugs together on your solar panel and point…