Purchased this unit one year ago. I had many good months of charging. Now it has stopped. Checked the fuse, Read 19-22 vdc from panel, blue light is steady but nothing going to battery.
Possible warranty perhaps.
asked
Smart Solar MPPT 75 15 solar charger not charging
Hi,
Fault finding steps.
1. log your settings in app before reset.
2. factory reset the mppt.
3. connect battery on it's own to mppt.
4. measure battery voltage on terminals at bat in MPPT.
5. connect PV cables to MPPT PV in.
6. measure battery voltage on terminals at Pv in MPPT.
As long as your PV is +5V above Battery reading it should start charging.
The 75/15 mppt has an external ato type blade fuse next to the VE.direct port. Remove and test this fuse only when PV and Battery are disconnected.
There is no internal fuse in that model so if everything still doesn't work it's warranty time.
