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Just the beginning...  started building this little unit today to keep the inverter / charger, fuse box and other wiring protected.

Will probably push the Easysolar-II back slightly (3-4 cm) as there is a recess in the wall of my motorhome, so that the top vent extrudes a bit... this means the bottom shifts up and I can wire downward from the glands visible at bottom of photo no. 1.

The lip is riveted onto both short side (left and right of photos 1 & 2) to allow the chequer plate (that's vastrap to you) to slide in and out.

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This afternoon: built bottom section for battery cells. 2 sets of 16 cells -  space for all to sit on the floor of the bottom shelf, or can be separated into 2 sub-shelves. Floor for bottom also to be chequer plate sealed with silicone, to prevent potentially corrosive gases escaping.

Top and bottom will each have their own separate venting systems - likely just large 220VAC fans on front and back creating a pressure gradient, with foam filters to catch dust.

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Posted (edited)

LiFePO4 cells (16x 2p) on lower shelf / tray. Riveted 2mm gauge angle onto all 4 lower edges, creating strength so chequer plate shelf now holds 100 kg of cells without flex.

Will soon connect in series, through 100A HRC fuse, then to  Victron EasySolar-II unit for its first run. Right now cells are just resting / balancing after paralleling.

 

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Edited by Wick
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Posted (edited)

Put the LiFePo4 battery pairs / 12V series into 48V series last night, today drilled out lugs, cut battery positive and connected 100A fuse, connected phase and neutral, connected to mains ground, tested voltage on input terminals which looked too low, tightened all bolts on busbars, tested again and looked OK at +52.6V.

Then the moment of truth - shut the 100A fuse holder - and flipped the on switch (to I, not II, in case any new Victron MP/ES owners read this).

Fan hummed gently and GX display came on without error! Connected to its wi-fi network without hassles and will be exploring the EasySolar-II's capabilities further.

Thanks to @Bain Viljoen @ Lithium Batteries SA and @Geoff Earnshaw @ Sustainable Energy Solutions for their assistance in sourcing the primary goods: batteries and inverter-charger.

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Edited by Wick
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