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Ecky · 08-24-2014, 01:17 PM

Started ordering parts for a grid charger. Looking to build the whole thing for under $30 shipped.

Here's a diagram I kipped from a post on InsightCentral and made minor modifications to:

These are my chosen 90v power supplies. - $19 shipped

This is my chosen 12v power supply. - $3.38 shipped

Apparently if your transformer isn't isolated, it will cause CELs and may even be dangerous. I need to learn a bit more about circuit design because I don't know how to tell if one is or isn't; I only know that these are safe because they've been confirmed so in threads on IC.

I haven't yet picked out a permanent voltmeter because I haven't found one with 12v leads that are properly isolated, and I'd rather not use a battery powered unit. I can still assemble the grid charger without it.

Also need to decide on what connectors to use and buy them, and find a box to build it in. I'll probably use an old PC power supply.

08-24-2014, 01:17 PM	#73 (permalink)
Ecky Master EcoModder Join Date: Dec 2011 Location: New Zealand Posts: 5,096 ND Miata - '15 Mazda MX-5 Special Package 90 day: 39.72 mpg (US) Oxygen Blue - '00 Honda Insight 90 day: 58.53 mpg (US) Thanks: 2,907 Thanked 2,572 Times in 1,594 Posts	Started ordering parts for a grid charger. Looking to build the whole thing for under $30 shipped. Here's a diagram I kipped from a post on InsightCentral and made minor modifications to: These are my chosen 90v power supplies. - $19 shipped This is my chosen 12v power supply. - $3.38 shipped Apparently if your transformer isn't isolated, it will cause CELs and may even be dangerous. I need to learn a bit more about circuit design because I don't know how to tell if one is or isn't; I only know that these are safe because they've been confirmed so in threads on IC. I haven't yet picked out a permanent voltmeter because I haven't found one with 12v leads that are properly isolated, and I'd rather not use a battery powered unit. I can still assemble the grid charger without it. Also need to decide on what connectors to use and buy them, and find a box to build it in. I'll probably use an old PC power supply. __________________ Ecky's (new) JDM Insight Ecomodding 2015 MX-5 Miata Honda Insight w/Acura TSX engine 2000 Insight TLC & Build Thread Last edited by Ecky; 08-24-2014 at 01:30 PM..