Murata announced the compact DMR20-10-DCM “nanoMeter” self-powered auto-ranging DC voltmeter designed for mounting in an industry-standard “oiltight” 30 and 30.5 mm / 1.2 inch round panel cutout.

The SP 8-100 3½-digit panel voltmeter has bright red LED digits that are 14.2 high. It comes in a one-piece housing that ensures splash-proof protection when correctly mounted with the supplied seal.

[Paulo]’s got a few solar panels on his shed, and while he does have a fairly nice setup with a battery charge controller, he found himself looking around for a panel voltmeter. Of course you can buy ...