Broken solar inverter

This 500W mains inverter beeped and flashed into failure mode!
Let's open it up, check it out and see if it can be repaired.
It used to be on the Power Cube, a homebuilt solar system for low wattage mains powered devices (rotary tool, 8W LED light etc). As such, power demands have always been low. But, on a 90F/30C day it looks like it overheated.
Moving the new capacitors to the outside of the case defeats a common issue, of manufacturers putting them next to heatsinks. I've fixed a TV and other devices by simply moving new capacitors away and they've remained trouble free for years afterwards.
The inverter will have a fan blowing over it for future use, to make sure the new caps don't suffer from the same problem.
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[@GrandadIsAnOldMan]

If nothing else, those caps are a good example to show when you want to talk about puffy caps. That fix is so satisfying 😊😊

[@Slider2732_]

An ASMR fix haha, maybe!
Was thinking, it was perhaps a good thing for all 4 to blow. If one of them hadn't, then the whole thing may have smoked.

[@johnwynne-qx6br]

What has been damaging the inverters in the first place. Good fix I wonder if your solar charger is faulty that is presuming that you are using solar charger. Hopefully this sorted things out for you.

[@Slider2732_]

Good stuff to think about, thanks. The solar charger wasn't running when this blew up though, it was a direct in from the 2x paralleled 12V LFP batteries. I'd turned input off at a main switch after the other went wonky. The charging has been checked and is fine, with the Redodo 40A MPPT and 20A Batteria MPPT.
This fixed unit is modified sine, limiting use, but am glad it works again 😀

[@Jon-fs2zj]

Nice fix.
I don't know much about electronics, your replacement caps equal 9400uf at 25volts?
If that's right it's okay to be bigger than what was originally in place?
Also do you run the risk of maybe frying something further down the line if they charge higher than the original 16volts?
Just wondering thanks.

[@Slider2732_]

Thanks 😀
9400uF compared to 8800uF is a bit like having 8 gallons of fuel in a car compared to 7 1/2. It could run a little further if needed but every journey uses 5 gallons. Caps can be higher rated in voltage value, never lower. From the design, these would fill with the power input for internal load balancing, so around 13V... they're the ones that cause sparks when folks don't use some kind of resistor on first connecting.